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Sample records for rubidium 78

  1. Discovery of interstellar rubidium

    NASA Technical Reports Server (NTRS)

    Jura, M.; Smith, W. H.

    1981-01-01

    Interstellar rubidium is detected through observations of the resonance line of Rb I at 7800 A towards zeta Oph. The abundance ratio of rubidium to potassium is estimated to be approximately solar, and if rubidium is generally found to have an abundance similar to potassium, it is indicated that the local interstellar medium is well mixed with a wide variety of the products of nucleosynthesis.

  2. Mineral Commodity Profiles -- Rubidium

    USGS Publications Warehouse

    Butterman, W.C.; Reese, R.G.

    2003-01-01

    Overview -- Rubidium is a soft, ductile, silvery-white metal that melts at 39.3 ?C. One of the alkali metals, it is positioned in group 1 (or IA) of the periodic table between potassium and cesium. Naturally occurring rubidium is slightly radioactive. Rubidium is an extremely reactive metal--it ignites spontaneously in the presence of air and decomposes water explosively, igniting the liberated hydrogen. Because of its reactivity, the metal and several of its compounds are hazardous materials, and must be stored and transported in isolation from possible reactants. Although rubidium is more abundant in the earth?s crust than copper, lead, or zinc, it forms no minerals of its own, and is, or has been, produced in small quantities as a byproduct of the processing of cesium and lithium ores taken from a few small deposits in Canada, Namibia, and Zambia. In the United States, the metal and its compounds are produced from imported raw materials by at least one company, the Cabot Corporation (Cabot, 2003). Rubidium is used interchangeably or together with cesium in many uses. Its principal application is in specialty glasses used in fiber optic telecommunication systems. Rubidium?s photoemissive properties have led to its use in night-vision devices, photoelectric cells, and photomultiplier tubes. It has several uses in medical science, such as in positron emission tomographic (PET) imaging, the treatment of epilepsy, and the ultracentrifugal separation of nucleic acids and viruses. A dozen or more other uses are known, which include use as a cocatalyst for several organic reactions and in frequency reference oscillators for telecommunications network synchronization. The market for rubidium is extremely small, amounting to 1 to 2 metric tons per year (t/yr) in the United States. World resources are vast compared with demand.

  3. Rubidium-Strontium collisions

    NASA Astrophysics Data System (ADS)

    Kleinert, Michaela; Potter, Garrett; Whitehead, Marc; McEntee, Elyse; Koll, Christopher J.

    2010-03-01

    The invention of the magneto-optical trap (MOT) in 1987 - which was awarded the Noble Price in Physics 10 years later - has enabled many new and exciting experiments. Among them are precision measurements of basic atomic properties, ultracold collisions, Bose-Einstein Condensates, atom lasers, etc.. Recent developments in the field of atomic and molecular physics have included the creation of diatomic (homo- and heteronuclear) molecules. These ultracold molecules promise to revolutionize physical chemistry, few-body physics, precision measurements and quantum information processing, similar to how ultracold atoms revolutionized AMO physics several years ago. We will present our first results of a mixed alkaline (rubidium) and alkaline-earth (strontium) magneto-optical trap.

  4. The USNO rubidium fountains

    NASA Astrophysics Data System (ADS)

    Peil, Steven; Hanssen, James; Swanson, Thomas B.; Taylor, Jennifer; Ekstrom, Christopher R.

    2016-06-01

    Four rubidium fountains at the U.S. Naval Observatory (USNO) have been in operation for 4.5 years. Each fountain has demonstrated periods of stability marked by Total or Theo deviation below 10-16 Occasional frequency changes, on order of 1.5 times per year per fountain, introduce deviations from white-frequency noise behavior. Averaged together, the four fountains form an ensemble with a white-frequency noise level of 10-13 and excellent long-term stability as compared to the primary frequency standards contributing to TAI. Progress on using the clocks at USNO for improving limits on coupling of fundamental constants to gravity by measuring the universality of the gravitational redshift for different types of clocks is discussed.

  5. The USNO rubidium fountains

    NASA Astrophysics Data System (ADS)

    Peil, Steven; Hanssen, James; Swanson, Thomas B.; Taylor, Jennifer; Ekstrom, Christopher R.

    2016-06-01

    Four rubidium fountains at the U.S. Naval Observatory (USNO) have been in operation for 4.5 years. Each fountain has demonstrated periods of stability marked by Total or Theo deviation below 10‑16 Occasional frequency changes, on order of 1.5 times per year per fountain, introduce deviations from white-frequency noise behavior. Averaged together, the four fountains form an ensemble with a white-frequency noise level of 10‑13 and excellent long-term stability as compared to the primary frequency standards contributing to TAI. Progress on using the clocks at USNO for improving limits on coupling of fundamental constants to gravity by measuring the universality of the gravitational redshift for different types of clocks is discussed.

  6. Rectified Forces in Rubidium

    NASA Astrophysics Data System (ADS)

    Grove, Timothy Todd

    The forces exerted on a three-level atom by a bichromatic standing-wave field are investigated. A theoretical analysis shows that the standing-wave dipole force can be rectified, i.e., maintain its sign over many optical wavelengths. Three systems in particular are studied: the lambda, the vee, and the cascade. Experimental results for the rubidium 5S --> 5P --> 5D cascade system are used to confirm the theory. The nearly coincident transition wavelengths for this system (780.0 nm and 776.0 nm) provide potential wells repeating at the beat wavelength (71 μm) which can accumulate laser cooled atoms. This force may have future applications in forming deep neutral atom traps as well as in the creation of new elements for atom optics. Two-color, two-photon spectroscopy of the 5D_{5/2}<=vel using the same cascade system (5S --> 5P --> 5D) was also performed.

  7. Electromagnetically induced transparency in rubidium

    NASA Astrophysics Data System (ADS)

    Olson, Abraham J.; Mayer, Shannon K.

    2009-02-01

    We investigate ladder-type electromagnetically induced transparency (EIT) in rubidium gas. The theoretical absorption profile of a weak probe laser beam at 780.2nm (5S1/2→5P3/2) is modeled in the presence of a strong coupling laser beam at 776.0nm (5P3/2→5D5/2) and the absorption transparency window is characterized. We use two grating-feedback diode lasers and observe EIT experimentally in rubidium and compare the results to the theory. This experiment brings quantum optics into the advanced undergraduate laboratory and utilizes equipment and expertise commonly available in laboratories equipped to perform diode-laser-based absorption spectroscopy of rubidium.

  8. Rubidium dimer destruction by a diode laser

    SciTech Connect

    Ban, T.; Aumiler, D.; Pichler, G.

    2005-02-01

    We observed rubidium dimer destruction by excitation of rubidium vapor with diode laser light tuned across the Rb D{sub 2} resonance line in a 2400 GHz tuning interval. The destruction was measured for rubidium atom concentrations in the (1-9)x10{sup 16} cm{sup -3} range, pump beam power up to 43 mW, and with a 5 Torr of the helium buffer gas. We discuss the physical mechanisms involved and specify the molecular pathways which may effectively lead to the observed dimer destruction.

  9. Rubidium-87 gas cell studies, phase 2

    NASA Technical Reports Server (NTRS)

    Vanier, J.

    1973-01-01

    A description is given of the development of a compact rubidium-87 maser. Data cover the electronic control system for the maser itself and a superhetrodyne receiver capable of locking a crystal oscillator to the maser signal.

  10. RUBIDIUM IN THE INTERSTELLAR MEDIUM

    SciTech Connect

    Walker, Kyle M.; Federman, S. R.; Knauth, David C.; Lambert, David L. E-mail: steven.federman@utoledo.ed E-mail: dll@astro.as.utexas.ed

    2009-11-20

    We present observations of interstellar rubidium toward o Per, zeta Per, AE Aur, HD 147889, chi Oph, zeta Oph, and 20 Aql. Theory suggests that stable {sup 85}Rb and long-lived {sup 87}Rb are produced predominantly by high-mass stars, through a combination of the weak s- and r-processes. The {sup 85}Rb/{sup 87}Rb ratio was determined from measurements of the Rb I line at 7800 A and was compared to the solar system meteoritic ratio of 2.59. Within 1sigma uncertainties, all directions except HD 147889 have Rb isotope ratios consistent with the solar system value. The ratio toward HD 147889 is much lower than the meteoritic value and similar to that toward rho Oph A; both lines of sight probe the Rho Ophiuchus Molecular Cloud. The earlier result was attributed to a deficit of r-processed {sup 85}Rb. Our larger sample suggests instead that {sup 87}Rb is enhanced in these two lines of sight. When the total elemental abundance of Rb is compared to the K elemental abundance, the interstellar Rb/K ratio is significantly lower than the meteoritic ratio for all the sight lines in this study. Available interstellar samples for other s- and r- process elements are used to help interpret these results.

  11. Disciplined rubidium oscillator with GPS selective availability

    NASA Technical Reports Server (NTRS)

    Dewey, Wayne P.

    1993-01-01

    A U.S. Department of Defense decision for continuous implementation of GPS Selective Availability (S/A) has made it necessary to modify Rubidium oscillator disciplining methods. One such method for reducing the effects of S/A on the oscillator disciplining process was developed which achieves results approaching pre-S/A GPS. The Satellite Hopping algorithm used in minimizing the effects of S/A on the oscillator disciplining process is described, and the results of using this process to those obtained prior to the implementation of S/A are compared. Test results are from a TrueTime Rubidium based Model GPS-DC timing receiver.

  12. A rubidium clock for SEEK-TALK

    NASA Technical Reports Server (NTRS)

    Riley, W. J.

    1983-01-01

    The development of a tactical rubidium frequency standard (TRFS) for the SEEK-TALK program is discussed. This effort, which is entering the prototype stage, is directed toward the establishment of a production capability for miniature rubidium clocks of medium stability capable of fast warmup and extreme ruggedness for military avionics applications. The overall unit consists of an ultraminiature physics package and four plug-in circuit boards inside a 2 1/2-inch square by 4-inch box. This size is achieved without the extensive use of hybrid microcircuitry, yet is believed to be the smallest atomic frequency standard yet developed.

  13. Nonlinear Spectroscopy of Rubidium: An Undergraduate Experiment

    ERIC Educational Resources Information Center

    Jacques, V.; Hingant, B.; Allafort, A.; Pigeard, M.; Roch, J. F.

    2009-01-01

    In this paper, we describe two complementary nonlinear spectroscopy methods which both allow one to achieve Doppler-free spectra of atomic gases. First, saturated absorption spectroscopy is used to investigate the structure of the 5S[subscript 1/2] [right arrow] 5P[subscript 3/2] transition in rubidium. Using a slightly modified experimental…

  14. A rubidium clock for GPS. [breadboard model

    NASA Technical Reports Server (NTRS)

    Riley, W. J.

    1982-01-01

    The design objectives and approach; the more important design features; the signal parameters and error budget; and early test results in the development of a second-source rubidium frequency standard for use in the GPS navigation satellites are discussed. Tests of a breadboard version of the RFS show that the measured time-domain stability is within the goal specification. The results are uncorrected for the conribution of the reference and are probably limited by the reference stability in the medium term region. The Rb reference is bbetter in the medium term region, but the Cs reference is etter at 10,000 seconds and longer, probably because of the barometric sensitivity of the rubidium reference unit.

  15. Rubidium 87 gas cell studies, phase 2. [design and characteristics of rubidium maser

    NASA Technical Reports Server (NTRS)

    Vanier, J.

    1974-01-01

    The design, development, and characteristics of a rubidium 87 maser are discussed. The design of a receiver capable of locking a crystal oscillator to the maser signal is reported. The subjects considered are: (1) maser construction, (2) maser control electronics, (3) the characteristics of the receiver, and (4) results of experimental maser tests.

  16. Rubidium-strontium relations in tranquillity base samples.

    PubMed

    Hurley, P M; Pinson, W H

    1970-01-30

    Preliminary total rock analyses disclosed a greatly different rubidium depletion between two groups of these igneous rocks, and ratios of strontium-87 to strontium-86 indicate that the rubidium depletion in these materials must have occurred during or shortly after the accretion of the terrestrial planets.

  17. Pulsed filling of a dark magnetooptical trap for rubidium atoms

    SciTech Connect

    Chapovskii, Pavel L

    2006-03-31

    The parameters of a dark magnetooptical trap for rubidium atoms are measured. The rubidium atoms captured and cooled in the trap occupy a hyperfine level of the ground electronic state, which does not interact with cooling laser radiation. The pulsed filling of the trap is produced due to desorption of rubidium caused by irradiation by a short (1 ms) light pulse. The trap captures and cools 2.5x10{sup 8} rubidium atoms approximately for 0.2 s. The absorption spectra of a weak probe field by cold atoms are obtained, which demonstrate a good spectral resolution of the hyperfine structure in the excited state. This structure is completely hidden by the Doppler broadening in rubidium vapours at room temperature. (laser cooling)

  18. Rubidium dimers in paraffin-coated cells

    NASA Astrophysics Data System (ADS)

    Acosta, V. M.; Jarmola, A.; Windes, D.; Corsini, E.; Ledbetter, M. P.; Karaulanov, T.; Auzinsh, M.; Rangwala, S. A.; Kimball, D. F. Jackson; Budker, D.

    2010-08-01

    Measurements were made to determine the density of rubidium dimer vapor in paraffin-coated cells. The number density of dimers and atoms in similar paraffin-coated and uncoated cells was measured by optical spectroscopy. Due to the relatively low melting point of paraffin, a limited temperature range of 43-80 °C was explored, with the lower end corresponding to a dimer density of less than 107 cm- 3. With 1 min integration time, a sensitivity to dimer number density of better than 106 cm- 3 was achieved. No significant difference in dimer density between the cells was observed.

  19. Rubidium-87 gas cell studies, phase 1

    NASA Technical Reports Server (NTRS)

    Vanier, J.

    1972-01-01

    The construction of a quartz bulb-quartz cavity type rubidium maser is described, and the results obtained with two of these masers are presented. The tuning characteristics, medium term stability, and short term stability are reported. It is concluded that the stability of the masers in the short term region is superior to any of the oscillators presently existing. On this basis it is believed that future development of the masers to reduce their size and improve their medium term stability is well justified.

  20. Rubidium-rich asymptotic giant branch stars.

    PubMed

    García-Hernández, D A; García-Lario, P; Plez, B; D'Antona, F; Manchado, A; Trigo-Rodríguez, J M

    2006-12-15

    A long-debated issue concerning the nucleosynthesis of neutron-rich elements in asymptotic giant branch (AGB) stars is the identification of the neutron source. We report intermediate-mass (4 to 8 solar masses) AGB stars in our Galaxy that are rubidium-rich as a result of overproduction of the long-lived radioactive isotope (87)Rb, as predicted theoretically 40 years ago. This finding represents direct observational evidence that the (22)Ne(alpha,n)(25)Mg reaction must be the dominant neutron source in these stars. These stars challenge our understanding of the late stages of the evolution of intermediate-mass stars and would have promoted a highly variable Rb/Sr environment in the early solar nebula. PMID:17095658

  1. Rubidium-rich asymptotic giant branch stars.

    PubMed

    García-Hernández, D A; García-Lario, P; Plez, B; D'Antona, F; Manchado, A; Trigo-Rodríguez, J M

    2006-12-15

    A long-debated issue concerning the nucleosynthesis of neutron-rich elements in asymptotic giant branch (AGB) stars is the identification of the neutron source. We report intermediate-mass (4 to 8 solar masses) AGB stars in our Galaxy that are rubidium-rich as a result of overproduction of the long-lived radioactive isotope (87)Rb, as predicted theoretically 40 years ago. This finding represents direct observational evidence that the (22)Ne(alpha,n)(25)Mg reaction must be the dominant neutron source in these stars. These stars challenge our understanding of the late stages of the evolution of intermediate-mass stars and would have promoted a highly variable Rb/Sr environment in the early solar nebula.

  2. Optical pumping of rubidium atoms in a parahydrogen matrix

    NASA Astrophysics Data System (ADS)

    Weinstein, Jonathan; Arnott, W. Patrick; Christy, Tim; Hartzell, Chase; Kanagin, Andrew; Momose, Takamasa; Patterson, David; Upadhyay, Sunil

    2016-05-01

    Building on prior work with rubidium atoms in a cryogenic argon matrix, we have grown solid parahydrogen crystals doped with rubidium atoms. Typical rubidium densities are on the order of 1017 cm-3. We have demonstrated optical pumping of the atomic spin of the implanted rubidium atoms; the measured spin polarization signals are roughly one order of magnitude larger than what was achieved in argon matrices. The combination of high atomic densities and optical addressability make this a promising experimental platform for applications such as magnetometry and fundamental physics measurements. Spin lifetimes (T1) on the order of 1 second have been observed. Progress towards measuring coherence times (T2) will be discussed. This material is based on work supported by the National Science Foundation under Grant No. PHY 1265905.

  3. On the detection of rubidium in diffuse interstellar clouds

    NASA Technical Reports Server (NTRS)

    Federman, S. R.; Sneden, C.; Schempp, W. V.; Smith, W. H.

    1985-01-01

    A search for absorption from neutral rubidium at 7800 A was conducted. No evidence for absorption to a 3 sigma limit of less than 1.5 mA was seen in the diffuse interstellar gas toward the stars omicron Persei, zeta Persei, and zeta Ophiuchi. Present results do not confirm the detection by Jura and Smith (1981) toward zeta Oph. A possible reason for the discrepancy is presented. In light of the present measurements, the abundance of interstellar rubidium in reconsidered.

  4. Two-element Zeeman slower for rubidium and lithium

    SciTech Connect

    Marti, G. Edward; Olf, Ryan; Vogt, Enrico; Oettl, Anton; Stamper-Kurn, Dan M.

    2010-04-15

    We demonstrate a two-element oven and Zeeman slower that produce simultaneous and overlapped slow beams of rubidium and lithium. The slower uses a three-stage design with a long, low-acceleration middle stage for decelerating rubidium situated between two short, high-acceleration stages for aggressive deceleration of lithium. This design is appropriate for producing high fluxes of atoms with a large mass ratio in a simple, robust setup.

  5. Quantum control and pathway manipulation in rubidium

    NASA Astrophysics Data System (ADS)

    Gao, Fang; Wang, Yaoxiong; Rey-de-Castro, Roberto; Rabitz, Herschel; Shuang, Feng

    2015-09-01

    There is an increasing interest in the extraction and control of the interfering quantum pathway amplitudes induced by control fields during laser-matter interactions. The Hamiltonian-encoding and observable-decoding (HE-OD) technique has been introduced for extracting the amplitudes of the pathways present in the dynamics and has recently been experimentally applied to the pathway manipulation of atomic rubidium. This paper theoretically explores various strategies for manipulating pathway amplitudes in the context of a laser field interacting with a multilevel system similar to atomic rubidium for both narrow-band and broadband ultrafast fields. In the perturbation regime, two second-order quantum pathways connecting the Rb states 5 S1 /2 and 5 D3 /2 dominate the dynamics, namely, 5 S1 /2→5 P3 /2→5 D3 /2 (pathway 1) and 5 S1 /2→5 P1 /2→5 D3 /2 (pathway 2). For narrow-band field control, the analysis is carried out in the time domain with the laser field including only four narrow-band envelope subpulses centered at the resonant frequencies. When the two pathways cooperate constructively, temporal oscillations appear in the ratio of the two pathway amplitudes, and we conclude in this case that the period corresponds to the detuning between transitions 5 S1 /2→5 P3 /2 and 5 P3 /2→5 D3 /2 . For broadband field control, the dynamics are treated in the frequency domain with the laser field including both resonant and continuous nonresonant frequency components. Various control strategies based on manipulating the phase of selected spectral components are tested. Compared to the outcome from a transform limited pulse, a π/2 step scheme can increase the dynamic range of the ratio between the two pathway amplitudes by a factor of ˜3 . A scheme that manipulates eight spectral blocks, in which the spectral boundaries depend on the resonant frequencies, can increase the ratio by several orders of magnitude. Numerical simulations show that further dividing the

  6. Catalysis of Forster Resonances in Rubidium

    NASA Astrophysics Data System (ADS)

    Win, A. L.; Williams, W. D.; Sukenik, C. I.

    2016-05-01

    When two ultracold Rydberg atoms collide they may change their quantum state if the total electronic energy of the two atoms before and after the collision is about the same. This process can be made resonant by tuning the energy levels of the atoms with an electric field, via the Stark shift, so that the energy difference between incoming and outgoing channels vanishes. This condition is known as a ``Forster resonance.'' We have studied a particular Forster resonance in rubidium: 34p + 34p --> 34s + 35s, by investigating the time dependence of the state change in an ultracold environment. Furthermore, we have added 34d state atoms to the mix and observed an enhancement of 34s atom production. We attribute this enhancement to a catalysis effect whereby the 34d atoms alter the spatial distribution of 34p atoms that participate in the energy transfer interaction. We will present results from the experiment and compare them to model calculations. Present address: Department of Physics, Smith College, Northampton, MA.

  7. Recovery of strontium activity from a strontium-82/rubidium-82 generator

    DOEpatents

    Taylor, Wayne A.; Phillips, Dennis R.; Sosnowski, Kenneth M.

    1999-10-12

    Strontium-82 is recovered from spent strontium-82/rubidium-82 generators to provide a source of strontium-82 for additional strontium-82/rubidium-82 generators. The process involves stripping of the strontium-82 from used strontium-82/rubidium-82 generators followed by purification of the strontium-82 material to remove additional metal contaminants to desired levels.

  8. Radiation hardness of Efratom M-100 rubidium frequency standard

    NASA Technical Reports Server (NTRS)

    English, T. C.; Vorwerk, H.; Rudie, N. J.

    1983-01-01

    The effects of nuclear radiation on rubidium gas cell frequency standards and components are presented, including the results of recent tests where a continuously operating rubidium frequency standard (Effratom, Model M-100) was subjected to simultaneous neutron/gamma radiation. At the highest neutron fluence 7.5 10 to the 12th power n/sq cm and total dose 11 krad(Si) tested, the unit operated satisfactorily; the total frequency change over the 2 1/2 hour test period due to all causes, including repeated retraction from and insertion into the reactor, was less than 1 x 10 to the -10th power. The effects of combined neutron/gamma radiation on rubidium frequency standard physics package components were also studied, and the results are presented.

  9. Operational frequency stability of rubidium and cesium frequency standards

    NASA Technical Reports Server (NTRS)

    Lavery, J. E.

    1973-01-01

    The frequency stabilities under operational conditions of several commercially available rubidium and cesium frequency standards were determined from experimental data for frequency averaging times from 10 to the 7th power s and are presented in table and graph form. For frequency averaging times between 10 to the 5th power and 10 to the 7th power s, the rubidium standards tested have a stability of between 10 to the minus 12th power and 5 x 10 to the minus 12th power, while the cesium standards have a stability of between 2 x 10 to the minus 13th power and 5 x 10 to the minus 13th power.

  10. Nonlinear transmission through a tapered fiber in rubidium vapor

    SciTech Connect

    Hendrickson, S. M.; Pittman, T. B.; Franson, J. D.

    2009-02-15

    Subwavelength-diameter tapered optical fibers surrounded by rubidium vapor can undergo a substantial decrease in transmission at high atomic densities due to the accumulation of rubidium atoms on the surface of the fiber. Here we demonstrate the ability to control these changes in transmission using light guided within the taper. We observe transmission through a tapered fiber that is a nonlinear function of the incident power. This effect can also allow a strong control beam to change the transmission of a weak probe beam.

  11. Spontaneuos and Parametric Processes in Warm Rubidium Vapours

    NASA Astrophysics Data System (ADS)

    Dąbrowski, M.; Parniak, M.; Pęcak, D.; Chrapkiewicz, R.; Wasilewski, W.

    2014-12-01

    Warm rubidium vapours are known to be a versatile medium for a variety of experiments in atomic physics and quantum optics. Here we present experimental results on producing the frequency converted light for quantum applications based on spontaneous and stimulated processes in rubidium vapours. In particular, we study the efficiency of spontaneously initiated stimulated Raman scattering in the Λ-level configuration and conditions of generating the coherent blue light assisted by multi-photon transitions in the diamond-level configuration. Our results will be helpful in search for new types of interfaces between light and atomic quantum memories.

  12. Discovery of rubidium, strontium, molybdenum, and rhodium isotopes

    SciTech Connect

    Parker, A.M.; Thoennessen, M.

    2012-07-15

    Currently, 31 rubidium, 35 strontium, 35 molybdenum, and 38 rhodium isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

  13. Dipole-dipole interaction between rubidium Rydberg atoms

    SciTech Connect

    Altiere, Emily; Fahey, Donald P.; Noel, Michael W.; Smith, Rachel J.; Carroll, Thomas J.

    2011-11-15

    Ultracold Rydberg atoms in a static electric field can exchange energy via the dipole-dipole interaction. The Stark effect shifts the energy levels of the atoms which tunes the energy exchange into resonance at specific values of the electric field (Foerster resonances). We excite rubidium atoms to Rydberg states by focusing either a 480 nm beam from a tunable dye laser or a pair of diode lasers into a magneto-optical trap. The trap lies at the center of a configuration of electrodes. We scan the electric field by controlling the voltage on the electrodes while measuring the fraction of atoms that interact. Dipole-dipole interaction spectra are presented for initially excited rubidium nd states for n=31 to 46 and for four different pairs of initially excited rubidium ns states. We also present the dipole-dipole interaction spectra for individual rubidium 32d (j, m{sub j}) fine structure levels that have been selectively excited. The data are compared to calculated spectra.

  14. Synthesis and characterization of a series of rubidium alkoxides and rubidium-titanium double alkoxides.

    PubMed

    Bunge, Scott D; Boyle, Timothy J; Pratt III, Harry D; Alam, Todd M; Rodriguez, Mark A

    2004-09-20

    This report investigates the structural aspects of the products isolated from the reactions of a series of titanium alkoxides [[Ti(OR)4]n n = 2, OR = OCH2C(CH3)3 (ONep) (1); n = 1, OC6H3(CH3)2-2,6 (DMP) (2)] with rubidium alkoxides [[Rb(OR)]infinity where OR = (ONep) (3), (DMP) (4), and OC6H3(CH(CH3)2)2-2,6 (DIP) (5)]. The resultant double alkoxides were determined by single crystal X-ray diffraction to be [Rb(mu-ONep)4(py)Ti(ONep)]2 (6), [Rb(mu-DMP)Ti(DMP)4]infinity (7), and [Rb(mu-DMP)2(mu-ONep)2Ti(ONep)]infinity (8). Compound 1 is the previously reported dinculear species with trigonal bipyramidal Ti metal centers whereas compound 2 is a monomer with a tetrahedral Ti center. Suitable X-ray quality crystals of 3 were not isolated. Compounds 4 and 5 demonstrate extended polymeric networks with Rb coordination ranging from two to five utilizing terminal mu- and mu3-OR ligands and pi-interactions of neighboring OAr ligands. The double alkoxide 6 revealed a simple tetranuclear structure with mu-ONep acting as the bridge, terminal ONep ligands on the Ti, and one terminal py on the Rb. For 7 and 8, the pi-interaction facilitated the formation of extended polymeric systems. All complexes were further characterized by FT-IR and multinuclear NMR spectroscopy.

  15. Observations on the Reliability of Rubidium Frequency Standards on Block 2/2A GPS Satellites

    NASA Technical Reports Server (NTRS)

    Dieter, Gary L.

    1996-01-01

    Currently, the block 2/2A Global Positioning System (GPS) satellites are equipped with two rubidium frequency standards. These frequency standards were originally intended to serve as the back-ups to two cesium frequency standards. As the constellation ages, the master Control Station is forced to initialize and increasing number or rubidium frequency standards. Unfortunately the operational use of these frequency standards has not lived up to initial expectations. Although the performance of these rubidium frequency standards has met and even exceeded GPS requirements, their reliability has not. The number of unscheduled outage times and the short operational lifetimes of the rubidium frequency standards compare poorly to the track record of the cesium frequency standards. Only a small number of rubidium frequency standards have actually been made operational. Of these, a large percentage have exhibited poor reliability. If this trend continues, it is unlikely that the rubidium frequency standards will help contribute to the navigation payload meeting program specification.

  16. Recycle Rate in a Pulsed, Optically Pumped Rubidium Laser

    SciTech Connect

    Miller, Wooddy S.; Sulham, Clifford V.; Holtgrave, Jeremy C.; Perram, Glen P.

    2010-10-08

    A pulsed, optically pumped rubidium laser operating in analogy to the diode pumped alkali laser (DPAL) system at pump intensities as high as 750 kW/cm{sup 2} has been demonstrated with output energies of up to 13 {mu}J/pulse. Output energy is dramatically limited by spin-orbit relaxation rates under these high intensity pump conditions. More than 250 photons are available for every rubidium atom in the pumped volume, requiring a high number of cycles per atom during the 2-8 ns duration of the pump pulse. At 550 Torr of ethane, the spin-orbit relaxation rate is too slow to effectively utilize all the incident pump photons. Indeed, a linear dependence of output energy on pump pulse duration for fixed pump energy is demonstrated.

  17. Resonant diffraction of synchrotron radiation in rubidium dihydrophosphate crystals

    SciTech Connect

    Mukhamedzhanov, E. Kh.; Kovalchuk, M. V.; Borisov, M. M.; Ovchinnikova, E. N.; Troshkov, E. V.; Dmitrienko, V. E.

    2010-03-15

    Purely resonant Bragg reflections 006, 55bar 0, and 666 in a rubidium dihydrophosphate (RbH{sub 2}PO{sub 4}) crystal at the K edge of rubidium have been experimentally and theoretically investigated. These reflections remain forbidden when the resonant dipole-dipole (E1E1) contribution to the resonant atomic factor is taken into account; they may be due to the dipole-quadrupole (E1E2) transitions as well as to the anisotropy atomic factor, which is caused by thermal atomic displacements (thermally induced contribution) and/or local jumps of hydrogen atoms. A numerical simulation showed that, at room temperature (experimental conditions), the thermally induced contribution to the 'forbidden' reflections is dominant.

  18. Cavity-enhanced frequency up-conversion in rubidium vapor.

    PubMed

    Offer, Rachel F; Conway, Johnathan W C; Riis, Erling; Franke-Arnold, Sonja; Arnold, Aidan S

    2016-05-15

    We report the first use of a ring cavity to both enhance the output power and dramatically narrow the linewidth (<1  MHz) of blue light generated by four-wave mixing in a rubidium vapor cell. We find that the high output power available in our cavity-free system leads to power broadening of the generated blue light linewidth. Our ring cavity removes this limitation, allowing high output power and narrow linewidth to be achieved concurrently. As the cavity blue light is widely tunable over the Rb855S1/2F=3→6P3/2 transition, this narrow linewidth light would be suitable for near-resonant rubidium studies including, for example, second-stage laser cooling. PMID:27176956

  19. Clocks for airborne systems. [performance of rubidium oscillators

    NASA Technical Reports Server (NTRS)

    Houlding, N.

    1982-01-01

    The potential performance of compact oscillators, needed for the development of accurate clocks for future airborne systems (such as Identification Friend or Foe schemes), is addressed. In particular, extensive testing of rubidium oscillators manufactured by Efratom is discussed. The results indicate that an accuracy of better than 10 microseconds should be achievable in tactical aircraft provided that appropriate measures are adopted to counter the many environmental factors. In a favorable environment a stability of better than 5 x 10 to the -13th power for one day is achievable with present commercial units, but improvements are required to suit operation in an aircraft. With further development of rubidium controlled clocks the ultimate limitation on time accuracy in aircraft will probably be associated with time dissemination, maintenance difficulties and doctrinal hurdles.

  20. Ramsey resonance of coherent population trapping in slow rubidium beam

    NASA Astrophysics Data System (ADS)

    Sokolov, I. M.

    2016-03-01

    We calculate the coherent population trapping (CPT) resonance in slow beam of rubidium 87 atoms caused by of their interaction with bichromatic electromagnetic field in two separated spatial domains. In the case of monovelocity beam we study the properties of the CPT resonance depending on type of working transitions, velocity of the atomic beam, intensity and polarization of electromagnetic fields, and space separation in Ramsey scheme.

  1. X-ray spectrographic determination of cesium and rubidium

    USGS Publications Warehouse

    Axelrod, J.M.; Adler, I.

    1957-01-01

    An x-ray spectrographic method for the determination of rubidium and cesium was developed, using the internal-standard method and a four-channel flat-crystal spectrograph. The sensitivity is within 0.1% for cesia and 0.02% for rubidia; the precision is within 10% of the amount present. Results agree well with those obtained by flame photometry and by radio-activation.

  2. Ionization of rubidium by 50-eV electrons

    SciTech Connect

    Haynes, M.A.; Lohmann, B.; Bray, I.; Bartschat, K.

    2004-04-01

    We report on a joint experimental and theoretical study of 50-eV electron-impact ionization of rubidium. Comparison of the experimental data with theoretical predictions from various models shows good qualitative agreement, as long as distortion and channel-coupling effects in the projectile-target interaction are accounted for. The remaining differences between experiment and theory indicate the need for further studies of this collision system.

  3. [Electrone probe microanalysis of rubidium retention in myocell of rat heart during acute ischemia].

    PubMed

    Pogorelov, A G; Pogorelova, V N; Pogorelova, M A

    2012-01-01

    In the given investigation contents of potassium and its physiological analog, rubidium, are determined in cardiomyocyte. Applying Electron Probe Microanalysis (EPMA), cytoplasmic concentrations of elements (K, Rb) are measured. The data obtained exhibit that for initial acute ischemia phase the active transport is involved in the uptake of rubidium which competes with potassium entry in cardiac myocell. Then, deep deenergization leads to the intracellular potassium depletion and rubidium retention. This suggests that Rb+ is physiologically not complete analog for K+. Results of combined perfusion with and without rubidium allow us to hypothesize the appearance of cascade of ionic transports to compensate acute ischemic disturbances following the oxygen and substrate deficiency. PMID:23136775

  4. Microwave interrogation cavity for the rubidium space cold atom clock

    NASA Astrophysics Data System (ADS)

    Wei, Ren; Yuan-Ci, Gao; Tang, Li; De-Sheng, Lü; Liang, Liu

    2016-06-01

    The performance of space cold atom clocks (SCACs) should be improved thanks to the microgravity environment in space. The microwave interrogation cavity is a key element in a SCAC. In this paper, we develop a microwave interrogation cavity especially for the rubidium SCAC. The interrogation cavity has two microwave interaction zones with a single feed-in source, which is located at the center of the cavity for symmetric coupling excitation and to ensure that the two interaction zones are in phase. The interrogation cavity has a measured resonance frequency of 6.835056471 GHz with a loaded quality factor of nearly 4200, which shows good agreement with simulation results. We measure the Rabi frequency of the clock transition of the rubidium atom in each microwave interaction zone, and subsequently demonstrate that the distributions of the magnetic field in the two interaction zones are the same and meet all requirements of the rubidium SCAC. Project supported by the National Natural Science Foundation of China (Grant No. 11034008), the Fund from the Ministry of Science and Technology of China (Grant No. 2013YQ09094304), and the Youth Innovation Promotion Association, Chinese Academy of Sciences.

  5. Microwave interrogation cavity for the rubidium space cold atom clock

    NASA Astrophysics Data System (ADS)

    Wei, Ren; Yuan-Ci, Gao; Tang, Li; De-Sheng, Lü; Liang, Liu

    2016-06-01

    The performance of space cold atom clocks (SCACs) should be improved thanks to the microgravity environment in space. The microwave interrogation cavity is a key element in a SCAC. In this paper, we develop a microwave interrogation cavity especially for the rubidium SCAC. The interrogation cavity has two microwave interaction zones with a single feed-in source, which is located at the center of the cavity for symmetric coupling excitation and to ensure that the two interaction zones are in phase. The interrogation cavity has a measured resonance frequency of 6.835056471 GHz with a loaded quality factor of nearly 4200, which shows good agreement with simulation results. We measure the Rabi frequency of the clock transition of the rubidium atom in each microwave interaction zone, and subsequently demonstrate that the distributions of the magnetic field in the two interaction zones are the same and meet all requirements of the rubidium SCAC. Project supported by the National Natural Science Foundation of China (Grant No. 11034008), the Fund from the Ministry of Science and Technology of China (Grant No. 2013YQ09094304), and the Youth Innovation Promotion Association, Chinese Academy of Sciences.

  6. Electromagnetically induced transparency in rubidium: An advanced undergraduate laboratory

    NASA Astrophysics Data System (ADS)

    Mayer, Shannon; Olson, Abraham

    2008-05-01

    Electromagnetically induced transparency (EIT) can be used to modify the optical response of an atomic medium to a resonant laser field. In EIT, a non-resonant pump laser beam can result in the reduction of absorption of a weak, resonant probe laser beam, provided the fields are coherently coupled by a common state. EIT provides a unique means of coherently controlling photons and has potential applications in fields ranging from quantum computing to telecommunications. In this advanced laboratory we describe the theory and experiment for investigating ladder-type EIT in rubidium gas. The theoretical absorption profile of a weak probe laser beam tuned across the 5S 1/2 to 5P 3/2 transition (780.2 nm) is modeled in the presence of a strong coupling laser beam tuned to the 5P 3/2 to 5D 5/2 transition (776.0 nm) and the absorption transparency window is characterized. Using grating-feedback diode lasers, we observe EIT experimentally in rubidium gas and compare the results to the theoretical model. Applications of EIT to high-resolution two-photon spectroscopy are also discussed. This laboratory uses much of the same equipment as the saturated absorption experiment commonly performed on the D2 line in rubidium, so it is easily implemented in laboratories with the equipment to conduct that experiment.

  7. Electromagnetically induced transparency in rubidium: An advanced undergraduate laboratory

    NASA Astrophysics Data System (ADS)

    Mayer, Shannon; Olson, Abraham

    2008-05-01

    Electromagnetically induced transparency (EIT) is a quantum interference effect used to modify the optical response of an atomic medium to a resonant laser field. In EIT, a non-resonant pump laser beam can result in the reduction of absorption of a weak, resonant probe laser beam, provided the fields are coherently coupled by a common state. EIT provides a unique means of coherently controlling photons and has potential applications in fields ranging from quantum computing to telecommunications. In this advanced laboratory we describe the theory and experiment for investigating ladder-type EIT in rubidium gas. The theoretical absorption profile of a weak probe laser beam tuned across the 5S 1/2 to 5P 3/2 transition (780.2 nm) is modeled in the presence of a strong coupling laser beam tuned to the 5P 3/2 to 5D 5/2 transition (776.0 nm) and the absorption transparency window is characterized. Using grating-feedback diode lasers, we observe EIT experimentally in rubidium gas and compare the results to the theoretical model. Applications of EIT to high-resolution two-photon spectroscopy are also discussed. This laboratory uses much of the same equipment as the saturated absorption experiment commonly performed on the D2 line in rubidium, so it is easily implemented in laboratories with the equipment to conduct that experiment.

  8. Electronically excited rubidium atom in a helium cluster or film

    NASA Astrophysics Data System (ADS)

    Leino, Markku; Viel, Alexandra; Zillich, Robert E.

    2008-11-01

    We present theoretical studies of helium droplets and films doped with one electronically excited rubidium atom Rb∗ (P2). Diffusion and path integral Monte Carlo approaches are used to investigate the energetics and the structure of clusters containing up to 14 helium atoms. The surface of large clusters is approximated by a helium film. The nonpair additive potential energy surface is modeled using a diatomic in molecule scheme. Calculations show that the stable structure of Rb∗Hen consists of a seven helium atom ring centered at the rubidium, surrounded by a tirelike second solvation shell. A very different structure is obtained when performing a "vertical Monte Carlo transition." In this approach, a path integral Monte Carlo equilibration starts from the stable configuration of a rubidium atom in the electronic ground state adsorbed to the helium surface after switching to the electronically excited surface. In this case, Rb∗Hen relaxes to a weakly bound metastable state in which Rb∗ sits in a shallow dimple. The interpretation of the results is consistent with the recent experimental observations [G. Auböck et al., Phys. Rev. Lett. 101, 035301 (2008)].

  9. Rubidium Optical Pumping for an Electron Spin Filter

    NASA Astrophysics Data System (ADS)

    Norrgard, Eric

    2010-03-01

    Our group is designing a novel polarized electron source based on spin exchange between an incident beam of electrons and an optically-pumped rubidium vapor target [1,2]. An overview of the spin filter design will be provided. I will then discuss optical pumping of rubidium and techniques for measuring spin polarization. An anomalous Rb polarization reversal detected when varying the wavelength of a pump laser with a spectral width of about 6 percent of the absorption profile of the Rb D2 transition width over the absorption profile will be examined. In the rubidium electron spin filter, viable spin exchange is thought to occur in the immediate vicinity of the exit aperture of the optical pumping region. Therefore, optical techniques for mapping the spatial dependence of a pumped Rb sample will be discussed, and measurements of Rb polarization throughout the optically-pump region will be presented.[4pt] [1] H. Batelaan et al., Phys. Rev. Lett., 82, 4216 (1999).[0pt] [2] M.A. Rosenberry, J.P. Reyes, D. Tupa, T.J. Gay Phys. Rev. A 75, 023401 (2007).

  10. Studies of atomic properties of francium and rubidium

    NASA Astrophysics Data System (ADS)

    Perez Galvan, Adrian

    High precision measurements of atomic properties are excellent probes for electroweak interaction studies at the lowest possible energy range. The extraction of standard model coupling constants relies on a unique combination of experimental measurements and theoretical atomic structure calculations. It is only through stringent comparison between experimental and theoretical values of atomic properties that a successful experiment can take place. Francium, with its heavy nucleus and alkali structure that makes it amenable to laser cooling and trapping, stands as an ideal test bed for such studies. Our group has successfully created, trapped and cooled several isotopes of francium, the heaviest of the alkalies, and demonstrated that precision studies of atomic properties, such as the measurement of the 8S 1/2 excited state lifetime of 210Fr presented here, are feasible. Further work in our program of electroweak studies requires a better control of the electromagnetic environment observed by the sample of cold atoms as well as a lower background pressure (10-10 torr or better). We have designed and adapted to our previous setup a new "science" vacuum chamber that fulfills these requirements and the transport system that will transfer the francium atoms to the new chamber. We use this new experimental setup as well as a rubidium glass cell to perform precision studies of atomic and nuclear properties of rubidium. Spectroscopic studies of the most abundant isotopes of rubidium, 85Rb and 87Rb, are a vital component in our program. Performing measurements in rubidium allows us to do extensive and rigorous searches of systematics that can be later extrapolated to francium. We present a precision lifetime measurement of the 5D 3/2 state of 87Rb and a measurement of hyperfine splittings of the 6S1/2 level of 87Rb and 85Rb. The quality of the data of the latter allows us to observe a hyperfine anomaly attributed to an isotopic difference of the magnetization distribution

  11. Was Bijvoet right? Sodium rubidium (+)-tartrate tetrahydrate revisited.

    PubMed

    Lutz, Martin; Schreurs, Antoine M M

    2008-08-01

    The first determination of the absolute configuration of an organic compound was published in 1951 on sodium rubidium (+)-tartrate tetrahydrate, Na(+).Rb(+).C(4)H(4)O(6)(2-).4H(2)O, but the atomic coordinates are not available in the public literature. This structure has therefore been redetermined using current equipment. The most up-to-date techniques for the determination of the absolute configuration have been applied and the question posed in the title can be answered with an unequivocal 'yes'. PMID:18682641

  12. Rubidium atomic frequency standards for GPS Block IIR

    NASA Technical Reports Server (NTRS)

    Riley, William J.

    1990-01-01

    The Rubidium Atomic Frequency Standards (RAFS) were provided for the GPS Block IIR NAVSTAR satellites. These satellites will replenish and upgrade the space segment of the Global Positioning System in the mid 1990s. The GPS RAFS Rb clocks are the latest generation of the high-performance rubidium frequency standards. They offer an aging rate in the low pp 10(exp 14)/day range and a drift-corrected 1-day stability in the low pp 10(exp 14) range. The Block IIR version of these devices will have improved performance, higher reliability, smaller size, and greater radiation hardness. The GPS Block IIR atomic clocks have a natural frequency configuration whereby they output a frequency of about 13.4 MHz that is a submultiple of the atomic resonance of Rb (or Cs). The RAFS operates at a low, fixed C-field for increased stability. The GPS Block IIR RAFS design, including the changes and improvements made, and the test results obtained are described.

  13. The Rubidium-Crystal Oscillator Hybrid Development Program

    NASA Technical Reports Server (NTRS)

    Vig, J. R.; Rosati, V. J.

    1984-01-01

    The rubidium-crystal oscillator hybrid (RbXO) will make precise time available to systems that lack the power required by atomic frequency standards. The RbXO consists of two subassemblies in separate enclosures. One contains a small rubidium frequency standard (RFS) without its internal oven-controlled crystal oscillator (OCXO), plus interface circuits. The second contains a low-power OCXO, and additional interface circuits. The OCXO is on continuously. Periodically, e.g., once a week, the user system applies power to the RFS. After the few necessary for the warmup of the RFS, the interface circuits adjust the frequency of the OCXO to the RFS reference, then shut off the RFS. The OCXO enclosure is separable from the RFS enclosure so that manpacks will be able to operate with minimum size, weight, and power consumption, while having the accuracy of the RFS for the duration of a mission. A prototype RbXO's RFS has operated successfully for 4200 on-off cycles. Parallel efforts on a Phase 2 RbXO development are in progress. Two sources for the RbXO are scheduled to be available during 1986.

  14. Labeling Feral Spruce Budworm (Lepidoptera: Tortricidae) Populations With Rubidium.

    PubMed

    MacKinnon, Wayne; Eveleigh, Eldon; Silk, Peter; Forbes, Glen

    2016-04-01

    Rubidium (Rb) is a trace element that occurs naturally in low concentrations and is easily absorbed by plants, making it a useful tool for labeling insect defoliators, such as spruce budworm (Choristoneura fumiferana Clemens). Balsam fir trees (Abies balsamea (L.) Miller) injected with either 8 or 16 g per tree of rubidium chloride (RbCl) showed quick uptake and distribution throughout the crown, with no negative effects on tree shoot growth or spruce budworm survival and development. Adult spruce budworm that fed as larvae on trees injected with RbCl were clearly labeled, with significantly higher Rb concentrations than the background levels found in adults that fed as larvae on control trees. Rb concentrations in feral spruce budworm adults for both the 8 g (9 µg/g) and 16 g (25 µg/g) per tree treatments were at least five times lower than those in laboratory-reared adults on 1,000 µg/g RbCl diet (125 µg/g); survival, development, pupal weight, sex ratio, and mating status of spruce budworm were not adversely affected by Rb treatment. Egg masses laid by feral females that fed as larvae on Rb-labeled trees were also labeled with Rb. Injecting trees with RbCl is a viable technique for labeling feral spruce budworm populations to help distinguish local populations from immigrants to better evaluate the success of early intervention strategies such as mating disruption. PMID:26920559

  15. Three-dimensional volumetric display in rubidium vapor

    NASA Astrophysics Data System (ADS)

    Kim, Isaac I.; Korevaar, Eric J.; Hakakha, Harel

    1996-03-01

    The successful demonstration of a novel 3D volumetric display based on the intersection of two low power diode laser beams in an atomic vapor is presented. A 780 nm laser and a 630 nm laser are directed via mirrors and x-y scanners towards an enclosure containing rubidium vapor, where they intersect at 90 degrees. Rubidium atoms within the small intersection volume undergo 5s1/2 to 5p3/2 excitation from the 780 nm laser, and then 5p3/2 to 6d5/2 excitation from the 630 nm laser, resulting in red omnidirectional fluorescence from the intersection point. Tuning of the lasers to the exact excitation wavelengths resulted in an extended red spot with maximum brightness. By tuning the lasers slightly off the transition wavelengths, a very localized red spot with slightly less brightness was produced. A series of intersection points were scanned in a time less than the eye's 15 Hz refresh rate to create true 3D volumetric images such as a floating cube and rotating globe, which were viewable from many angles. The maximum speed of the mechanical scanners limited the complexity of the 3D images. By incorporating higher power lasers and faster acousto-optical scanners, this technique could allow the 3D viewing of real time air traffic control, medical images, or theater battlefield management.

  16. Cell rubidium uptake: a method for studying functional heterogeneity in the nephron

    SciTech Connect

    Beck, F.X.; Doerge, A.B.; Bluemner, E.G.; Giebisch, G.; Thurau, K.

    1988-03-01

    Rubidium uptake into individual tubule cells of rat renal cortex as measured by energy-dispersive X-ray microanalysis on freeze dried cryosections was used as an index of potassium transport. Over a 30 second period following intravenous infusion of rubidium (0.5 mmol/kg body wt) rubidium content increased in all cells. After 30 seconds, rubidium contents were (in mmol/kg dry wt): 225 +/- 8 in distal convoluted tubule cells, 156 +/- 7 in connecting tubule cells, 110 +/- 7 in principal cells, 86 +/- 4 in proximal tubule cells and 24 +/- 2 in intercalated cells (mean +/- SEM). When distal sodium and potassium transport were stimulated by hypertonic saline loading, rubidium uptake was selectively increased into distal convoluted tubule cells by 38%, into connecting tubule cells by 36%, and into principal cells by 52%. However, rubidium uptake into proximal tubule and into intercalated cells remained unchanged. The preferential uptake of rubidium into distal convoluted tubule cells, connecting tubule cells, and principal cells correlates well with the known transport functions of sodium and potassium, whereas intercalated cells are distinguished by low sodium and potassium transport activity.

  17. Measurement of the lifetime of rubidium atoms in a dark magneto-optical trap

    SciTech Connect

    Permyakova, O I; Yakovlev, A V; Chapovskii, P L

    2008-09-30

    The lifetimes of rubidium atoms in a dark magneto-optical trap are measured at different populations of the 'bright' and 'dark' hyperfine states of captured atoms. It is found that the lifetime of atoms in the trap decreases if they spend more time in the bright state. A simple explanation of this effect is proposed which is based on the increase in the transport cross section for collisions of thermal rubidium atoms surrounding the trap with cold rubidium atoms upon their electronic excitation. (laser cooling)

  18. Hydrocarbon-free resonance transition 795-nm rubidium laser

    SciTech Connect

    Wu, S Q; Soules, T F; Page, R H; Mitchell, S C; Kanz, V K; Beach, R J

    2008-01-09

    An optical resonance transition rubidium laser (5{sup 2}P{sub 1/2} {yields} 5{sup 2}S{sub 1/2}) is demonstrated with a hydrocarbon-free buffer gas. Prior demonstrations of alkali resonance transition lasers have used ethane as either the buffer gas or a buffer gas component to promote rapid fine-structure mixing. However, our experience suggests that the alkali vapor reacts with the ethane producing carbon as one of the reaction products. This degrades long term laser reliability. Our recent experimental results with a 'clean' helium-only buffer gas system pumped by a Ti:sapphire laser demonstrate all the advantages of the original alkali laser system, but without the reliability issues associated with the use of ethane.

  19. Anomalous two-photon spectral features in warm rubidium vapor

    NASA Astrophysics Data System (ADS)

    Perrella, C.; Light, P. S.; Milburn, T. J.; Kielpinski, D.; Stace, T. M.; Luiten, A. N.

    2016-09-01

    We report observation of anomalous fluorescence spectral features in the environs of a two-photon transition in a rubidium vapor when excited with two different wavelength lasers that are both counterpropagating through the vapor. These features are characterized by an unusual trade-off between the detunings of the driving fields. Three different hypothetical processes are presented to explain the observed spectra: a simultaneous three-atom and four-photon collision, a four-photon excitation involving a light field produced via amplified spontaneous emission, and population pumping perturbing the expected steady-state spectra. Numerical modeling of each hypothetical process is presented, supporting the population pumping process as the most plausible mechanism.

  20. Laser-pumped paraffin-coated cell rubidium frequency standard

    SciTech Connect

    Bandi, Thejesh; Affolderbach, Christoph; Mileti, Gaetano

    2012-06-15

    We have realized and studied a rubidium atomic frequency standard based on a paraffin-coated cell, exhibiting a short-term frequency stability <3 Multiplication-Sign 10{sup -12} {tau}{sup -1/2} between {tau} = 1 and 100 s. Characterization of the wall-coating is performed by measuring the T{sub 1} and T{sub 2} relaxation times. Perturbations of the medium- to long-term clock stability, due to variations in the laser-intensity, laser frequency, the microwave power shift, and the shifts due to temperature variations are measured and analyzed. A method for reducing the intensity light-shift by detuning the laser frequency and the resulting improvement in clock stability is demonstrated. This work is of relevance for further improvements on Rb cell standards using anti-relaxation wall-coating technology.

  1. Nondegenerate four-wave mixing in rubidium vapor: Transient regime

    SciTech Connect

    Becerra, F. E.; Willis, R. T.; Rolston, S. L.; Orozco, L. A.; Carmichael, H. J.

    2010-10-15

    We investigate the transient response of the generated light from four-wave mixing (FWM) in the diamond configuration using a step-down field excitation. The transients show fast decay times and oscillations that depend on the detunings and intensities of the fields. A simplified model taking into account the thermal motion of the atoms, propagation, absorption, and dispersion effects shows qualitative agreement with the experimental observations with the energy levels in rubidium (5S{sub 1/2}, 5P{sub 1/2}, 5P{sub 3/2}, and 6S{sub 1/2}). The atomic polarization comes from all the contributions of different velocity classes of atoms in the ensemble modifying dramatically the total transient behavior of the light from FWM.

  2. Tunable rubidium excited state Voigt atomic optical filter.

    PubMed

    Yin, Longfei; Luo, Bin; Xiong, Junyu; Guo, Hong

    2016-03-21

    A tunable rubidium excited state Voigt atomic optical filter working at optical communication wavelength (1.5 μm) is realized. The filter achieves a peak transmittance of 57.6% with a double-peak structure, in which each one has a bandwidth of 600 MHz. Benefiting from the Voigt type structure, the magnetic field of the filter can be tuned from 0 to 1600 gauss, and a peak transmittance tunability of 1.6 GHz can thus be realized. Different from the excited state Faraday type filter, the pump efficiency in the Voigt filter is affected a lot by the pump polarization. Measured absorption results of the pump laser and transmittances of the signal laser both prove that the vertical linear polarization pumping is the most efficient in the Voigt filter. PMID:27136803

  3. Linewidth-tunable laser diode array for rubidium laser pumping

    SciTech Connect

    Li Zhiyong; Tan Rongqing; Xu Cheng; Li Lin

    2013-02-28

    To optimise the pump source for a high-power diodepumped rubidium vapour laser, we have designed a laser diode array (LDA) with a narrowed and tunable linewidth and an external cavity formed by two volume Bragg gratings (VBGs). Through controlling the temperature differences between the two VBGs, the LDA linewidth, which was 1.8 nm before mounting the two VBGs, was tunable from 100 pm to 0.2 nm, while the output power changed by no more than 4 %. By changing simultaneously the temperature in both VBGs, the centre wavelength in air of the linewidth-tunable LDA was tunable from 779.40 nm to 780.05 nm. (control of laser radiation parameters)

  4. Experimental research of a chain of diode pumped rubidium amplifiers.

    PubMed

    Li, Yunfei; Hua, Weihong; Li, Lei; Wang, Hongyan; Yang, Zining; Xu, Xiaojun

    2015-10-01

    In this paper, we have set up a diode pumped rubidium MOPA system with a chain of two amplifiers. The experimental results show an amplified laser power of 26W with amplification factor of 16.3 and power extraction efficiency of 53% for a single amplifier, and an amplified laser power of 11W with amplification factor of 7.9 and power extraction efficiency of 26% for a chain of two amplifiers. The reason for lower performance of cascade amplification is mainly due to the limited total pump power, which will be not sufficient for efficient pumping when assigned from a single amplifier into two amplifiers. The situation could be well improved by increasing the seed laser power as well as the pump power for each amplifier to realize high efficient saturated amplification. Such MOPA configuration has the potential for scaling high beam quality alkali laser into high powers. PMID:26480105

  5. Experimental research of a chain of diode pumped rubidium amplifiers.

    PubMed

    Li, Yunfei; Hua, Weihong; Li, Lei; Wang, Hongyan; Yang, Zining; Xu, Xiaojun

    2015-10-01

    In this paper, we have set up a diode pumped rubidium MOPA system with a chain of two amplifiers. The experimental results show an amplified laser power of 26W with amplification factor of 16.3 and power extraction efficiency of 53% for a single amplifier, and an amplified laser power of 11W with amplification factor of 7.9 and power extraction efficiency of 26% for a chain of two amplifiers. The reason for lower performance of cascade amplification is mainly due to the limited total pump power, which will be not sufficient for efficient pumping when assigned from a single amplifier into two amplifiers. The situation could be well improved by increasing the seed laser power as well as the pump power for each amplifier to realize high efficient saturated amplification. Such MOPA configuration has the potential for scaling high beam quality alkali laser into high powers.

  6. Interactions of Rubidium and Metastable Argon at Ultracold Temperatures

    NASA Astrophysics Data System (ADS)

    Shaffer, M. K.

    2005-05-01

    We are investigating the interaction between ultracold rubidium (Rb) and ultracold metastable argon (Ar*) simultaneously confined in a dual species magneto-optical trap (MOT). We will report on recent quantitative measurements of the inter-species trap loss coefficients and present our preliminary results on photoassociative spectra of the Rb-Ar* complex. We will also report on studies of Penning and associative ionization in the MOT using a modified residual gas analyzer (RGA) as a detector. Finally, we will discuss the prospects for producing and spatially confining ultracold ground state RbAr, a weakly-bound van der Waals molecule. Support provided by the National Science Foundation and the Office of Naval Research.

  7. A prospective comparison of rubidium-82 PET and thallium-201 SPECT myocardial perfusion imaging utilizing a single dipyridamole stress in the diagnosis of coronary artery disease

    SciTech Connect

    Go, R.T.; Marwick, T.H.; MacIntyre, W.J.; Saha, G.B.; Neumann, D.R.; Underwood, D.A.; Simpfendorfer, C.C. )

    1990-12-01

    The purpose of the present study is to prospectively compare myocardial perfusion imaging with rubidium-82 ({sup 82}Rb) by positron emission tomography (PET) with thallium-201 ({sup 201}Tl) imaging by single-photon emission tomography (SPECT) by recording both studies with a single dipyridamole handgrip stress, and reading both sets of images with the same display technique. In a series of 202 patients with previous coronary arteriography, the sensitivity, specificity, and accuracy of {sup 82}Rb PET were 93%, 78%, and 90% and for {sup 201}Tl SPECT 76%, 80%, and 77%, respectively. When 70 patients with previous therapeutic interventions were excluded, the remaining 132 patients showed a sensitivity, specificity, and accuracy of 95%, 82% and 92% for {sup 82}Rb PET and 79%, 76%, and 78% for {sup 201}Tl SPECT. The improved contrast resolution of PET resulted in markedly superior images and a more confident identification of defects.

  8. Rubidium-Strontium Formation Age of Allan Hills 84001 Carbonates

    NASA Technical Reports Server (NTRS)

    Borg, L. E.; Nyquist, L. E.; Shih, C.-Y.; Weismann, H.; Reese, Y.; Connelly, J. N.

    1998-01-01

    Our preferred age for the formation of carbonates in the martian meteorite ALH 84001 is 3.90 plus or minus 0.04 Ga for Lambda (Rubidium 87) equals 0.01402 Ga (exp -1), or 3.85 plus or minus 0.04 Ga for Lambda (Rubidium 87) = 0.0142 Ga(exponent -1). This age is determined by a three-point Rb-Sr isochron defined by leachates of high-graded carbonate-rich material. Major cation and especially phosphorous analyses of the leachates permit contributions from igneous whitlockite to be recognized for low-acidity leachates, and the corresponding data are omitted from the isochron. Data for the two highest acidity leachates plot close to the preferred isochron, but are omitted because we believe they contain contributions leached from the pyroxene substrate on which most of the carbonates are found. Nevertheless, the isochron age for all five highest-acidity leachates is 3.94 plus or minus 0.04 Ga, and is within error of the age obtained for the more restricted data set. All leachates used to define the isochron have major cation compositions that are singular to those obtained by microprobe analyses of the carbonate rosettes and are consistent with progressive digestion of the carbonates according to their composition. The age thus obtained for the carbonates is about 600 m.y. younger than the crystalization age of ALH 84001 determined by Sm-Nd analyses but is within error limits of the age of impact metamorphism inferred from the Rb-Sr and Ar-Ar systematics of silicates. which yield ages of 3.85 plus or minus 0.05 Ga and 4.05- 3.80 Ga to 4.3-3.8 Ga, respectively. Similarities between the carbonate crystallization age and the age of impact metamorphism as determined by Ar-Ar and Rb-Sr suggest that the carbonate formation is impact-related. Nevertheless, both high and low- temperature scenarios for the origin of the carbonates are possible.

  9. Production of complex rubidium and cesium hydrogen sulfate‒phosphates

    NASA Astrophysics Data System (ADS)

    Komornikov, V. A.; Grebenev, V. V.; Makarova, I. P.; Selezneva, E. V.; Andreev, P. V.

    2016-07-01

    The solubility in the CsH2PO4‒CsHSO4‒H2O system at different temperatures (25, 50, and 75°C) is studied and the phase equilibria in the Rb3H(SO4)2‒RbH2PO4‒H2O system under isothermal conditions (at 25°C) are analyzed. The temperature and concentration conditions for forming Rb2(HSO4)(H2PO4), Rb4(HSO4)3(H2PO4), Cs4(HSO4)3(H2PO4), Cs3(HSO4)2(H2PO4), Cs2(HSO4)(H2PO4), and Cs6H(HSO4)3(H2PO4)4 compounds (the latter has been obtained for the first time) are determined. The conditions for growing large single crystals of complex acid rubidium and cesium salts are found.

  10. Distribution of rubidium between sodic sanidine and natural silicic liquid

    USGS Publications Warehouse

    Noble, D.C.; Hedge, C.E.

    1970-01-01

    Phenocrysts of sodic sanidine from twelve upper Cenozoic units of silicic ash-flow tuff and lava from the Western United States contain from 0.25 to 0.45 the Rb present in the associated groundmass materials. The ratios of potassium to rubidium in the sanidines are, on the average, about four times greater than those of the groundmass. Separation of phenocrystic sanidine from salic melts provides an efficient method for raising the Rb content and lowering the K/Rb ratio of the melts, although the amount of differentiation probably is limited by continuous reequilibration of the alkalis between crystal and liquid phases through ion exchange. Syenites of cumulate origin will have appreciably lower Rb contents and higher K/Rb ratios than the melts from which they precipitated. Available data on the distribution of Rb between synthetic biotite and K-sanidine demonstrate that the separation of biotite probably will not deplete salic melts in Rb relative to K. ?? 1970 Springer-Verlag.

  11. The system design of a rubidium maser frequency standard

    NASA Technical Reports Server (NTRS)

    Xiong, C. X.

    1984-01-01

    The Rubidium Maser Frequency Standard is a precision frequency source with excellent short-term stability. A type PBR-II Rb maser frequency standard was developed by the Beijing Institute of Radio Metrology and Measurement (BIRMM). The time-domain frequency stability (two-sample variance) of this frequency standard is less than 1/5 times 10 to the 13th power for t=10ms yields 1.0s, fh=1.0 KHz. Two PBR-II frequency standards were used as reference frequency sources in a frequency stability measurement system. Some important system characteristics for the PBR-II Rb maser frequency standard such as phase noise and frequency stability transfer characteristics are discussed. Furthermore, the design of the frequency standard for optimum frequency stability of the output signal; the choice of a voltage controlled crystal oscillator for the frequency standard; the design of the phase-locked loop; and the frequency stability test results on the PBR-II are discussed.

  12. Influence of modulation frequency in rubidium cell frequency standards

    NASA Technical Reports Server (NTRS)

    Audoin, C.; Viennet, J.; Cyr, N.; Vanier, J.

    1983-01-01

    The error signal which is used to control the frequency of the quartz crystal oscillator of a passive rubidium cell frequency standard is considered. The value of the slope of this signal, for an interrogation frequency close to the atomic transition frequency is calculated and measured for various phase (or frequency) modulation waveforms, and for several values of the modulation frequency. A theoretical analysis is made using a model which applies to a system in which the optical pumping rate, the relaxation rates and the RF field are homogeneous. Results are given for sine-wave phase modulation, square-wave frequency modulation and square-wave phase modulation. The influence of the modulation frequency on the slope of the error signal is specified. It is shown that the modulation frequency can be chosen as large as twice the non-saturated full-width at half-maximum without a drastic loss of the sensitivity to an offset of the interrogation frequency from center line, provided that the power saturation factor and the amplitude of modulation are properly adjusted.

  13. Marking Drosophila suzukii (Diptera: Drosophilidae) With Rubidium or 15N.

    PubMed

    Klick, J; Yang, W Q; Bruck, D J

    2015-06-01

    Drosophila suzukii Matsumura (Diptera: Drosophilidae) has caused significant economic damage to berry and stone fruit production regions. Markers that are systemic in plants and easily transferred to target organisms are needed to track D. suzukii exploitation of host resources and trophic interactions. High and low concentrations of the trace element, rubidium (Rb), and the stable isotope, 15N, were tested to mark D. suzukii larvae feeding on fruits of enriched strawberry plants grown in containers under greenhouse conditions. Fly marker content and proportion of flies marked 1, 7, and 14 d after emergence from enriched fruits and fly dry mass were analyzed. Nearly 100% of the flies analyzed 14 d after emerging from 15N-enriched plants were marked, whereas only 30-75% and 0-3% were marked 14 d after emerging from high and low Rb concentration plants, respectively. Rapid Rb decay, strong 15N persistence, and the economics of using these markers in the field to elucidate D. suzukii pest ecology are discussed. PMID:26470275

  14. Transport of rubidium and strontium in detached wheat shoots

    SciTech Connect

    Feller, U.

    1986-04-01

    Rb is easily translocated in xylem and phloem (similar to K), while Sr is mobile in the xylem but rather immobile in the phloem. Wheat shoots from the field were cut 1 week after ear emergence below or above the uppermost node and incubated for 3 days standing in flasks with 2 mM rubidium chloride + 2 mM strontium chloride. In some plants the phloem flux to the ear was interrupted by steam-girdling below the ear. Rb and Sr were analyzed in the different parts of the shoots by atomic absorption spectroscopy. The Rb content in the ear depended remarkably on the treatment: 0.139 mg/ear were detected in shoots cut below the node (A), 0.015 mg/ear in shoots cut above the node (B), 0.019 mg/ear in shoots cut below the node after removing the flag leaf spread (C) and only 0.001 mg/ear in shoots cut below the node and steam-girdled below the ear (D). The Sr content was not drastically affected by these treatments: 0.278 (a), 0.317 (b), 0.356 (C) and 0.214 (D) mg/ear. These results suggest that Rb was transferred from the xylem to the phloem and translocated mainly with the phloem stream to the ear.

  15. Excitation and emission spectra of rubidium in rare-gas thin-films

    SciTech Connect

    Gerhardt, Ilja; Sin, Kyungseob; Momose, Takamasa

    2012-07-07

    To understand the optical properties of atoms in solid state matrices, the absorption, excitation, and emission spectra of rubidium doped thin-films of argon, krypton, and xenon were investigated in detail. A two-dimensional spectral analysis extends earlier reports on the excitation and emission properties of rubidium in rare-gas hosts. We found that the doped crystals of krypton and xenon exhibit a simple absorption-emission relation, whereas rubidium in argon showed more complicated spectral structures. Our sample preparation employed in the present work yielded different results for the Ar crystal, but our peak positions were consistent with the prediction based on the linear extrapolation of Xe and Kr data. We also observed a bleaching behavior in rubidium excitation spectra, which suggests a population transfer from one to another spectral feature due to hole-burning. The observed optical response implies that rubidium in rare-gas thin-films is detectable with extremely high sensitivity, possibly down to a single atom level, in low concentration samples.

  16. Operational stability of rubidium and cesium frequency standards. [analysis of equipment performance at NASA tracking stations

    NASA Technical Reports Server (NTRS)

    Lavery, J. E.

    1972-01-01

    In the course of testing various rubidium and cesium frequency standards under operational conditions for use in NASA tracking stations, about 55 unit-years of relative frequency measurements for averaging times from 10 to 10 to the 7th power have been accumulated at Goddard Space Flight Center (GSFC). Statistics on the behavior of rubidium and cesium standards under controlled laboratory conditions have been published, but it was not known to what extent the lesser controlled environments of NASA tracking stations affected the performance of the standards. The purpose of this report is to present estimates of the frequency stability of rubidium and cesium frequency standards under operational conditions based on the data accumulated at GSFC.

  17. Rubidium-mediated birch-type reduction of 1,2-diphenylbenzene in tetrahydrofuran.

    PubMed

    Krieck, Sven; Kretschmer, Robert; Görls, Helmar; Westerhausen, Matthias

    2011-05-11

    The reaction of 1,2-diphenylbenzene with rubidium metal in THF yields extremely sensitive and pyrophoric [η(5)-{1,2-diphenyl-2,5-cyclohexadienyl}rubidium](∞) (1). Compound 1 characterizes a possible intermediate in a Birch-type reaction and represents a very rare example of a fully characterized organorubidium complex as well as an open main-group metal pentadienide as part of a six-membered ring. In the solid state the rubidium atoms interact with the cyclohexadienyl moiety, whereas the coordination sphere of the soft cation is additionally stabilized exclusively by several metal π-arene interactions despite the presence of strongly coordinating donors. The bonding situation was elucidated by MP2/def2-TZVPP calculations including population analysis.

  18. Microresonator Brillouin laser stabilization using a microfabricated rubidium cell.

    PubMed

    Loh, William; Hummon, Matthew T; Leopardi, Holly F; Fortier, Tara M; Quinlan, Frank; Kitching, John; Papp, Scott B; Diddams, Scott A

    2016-06-27

    We frequency stabilize the output of a miniature stimulated Brillouin scattering (SBS) laser to rubidium atoms in a microfabricated cell to realize a laser system with frequency stability at the 10-11 level over seven decades in averaging time. In addition, our system has the advantages of robustness, low cost and the potential for integration that would lead to still further miniaturization. The SBS laser operating at 1560 nm exhibits a spectral linewidth of 820 Hz, but its frequency drifts over a few MHz on the 1 hour timescale. By locking the second harmonic of the SBS laser to the Rb reference, we reduce this drift by a factor of 103 to the level of a few kHz over the course of an hour. For our combined SBS and Rb laser system, we measure a frequency noise of 4 × 104 Hz2/Hz at 10 Hz offset frequency which rapidly rolls off to a level of 0.2 Hz2/Hz at 100 kHz offset. The corresponding Allan deviation is ≤2 × 10-11 for averaging times spanning 10-4 to 103 s. By optically dividing the signal of the laser down to microwave frequencies, we generate an RF signal at 2 GHz with phase noise at the level of -76 dBc/Hz and -140 dBc/Hz at offset frequencies of 10 Hz and 10 kHz, respectively. PMID:27410604

  19. Resonance transition 795-nm Rubidium laser using 3He buffer gas

    SciTech Connect

    Wu, S S; Soules, T F; Page, R H; Mitchell, S C; Kanz, V K; Beach, R J

    2007-08-02

    We report the first demonstration of a 795-nm Rubidium resonance transition laser using a buffer gas consisting of pure {sup 3}He. This follows our recent demonstration of a hydrocarbon-free 795-nm Rubidium resonance laser which used naturally-occurring He as the buffer gas. Using He gas that is isotopically enriched with {sup 3}He yields enhanced mixing of the Rb fine-structure levels. This enables efficient lasing at reduced He buffer gas pressure, improving thermal management in high average power Rb lasers and enhancing the power scaling potential of such systems.

  20. Radiation trapping in rubidium optical pumping at low buffer-gas pressures

    SciTech Connect

    Rosenberry, M. A.; Reyes, J. P.; Gay, T. J.; Tupa, D.

    2007-02-15

    We have made a systematic study of rubidium optical pumping in a simple cylindrical cell geometry with a high-power 10 W diode laser array, low magnetic fields, and buffer-gas pressures of less than 50 torr. We have determined rubidium polarizations experimentally for H{sub 2}, N{sub 2}, He, and Ar buffer gases, with Rb number densities from 10{sup 12} to 10{sup 13} cm{sup -3}. Comparison to a relatively simple optical pumping model allows us to extract useful information about radiation trapping and quenching effects.

  1. Methods and evaluation of frequency aging in distributed-feedback laser diodes for rubidium atomic clocks.

    PubMed

    Matthey, Renaud; Affolderbach, Christoph; Mileti, Gaetano

    2011-09-01

    Distributed-feedback laser diodes emitting at 780 nm have been evaluated, with respect to the aging of the injection current required for reaching the rubidium D2 resonance line. Results obtained for lasers operating in air and in vacuum for 9 months are reported. When operated at constant temperature, the laser current required for emission at the wavelength of the desired atomic resonance is found to decrease by 50 to 80 μA per month. The impact of this result on the lifetime and long-term performances of laser-pumped rubidium atomic clocks is discussed.

  2. Continuous generation of rubidium vapor in hollow-core photonic bandgap fibers.

    PubMed

    Donvalkar, Prathamesh S; Ramelow, Sven; Clemmen, Stéphane; Gaeta, Alexander L

    2015-11-15

    We demonstrate high optical depths (50±5) that last for hours in rubidium-filled hollow-core photonic bandgap fibers, which represent a 1000× improvement over the operation times previously reported. We investigate the vapor generation mechanism using both a continuous wave and a pulsed light source, and find that the mechanism for generating the rubidium atoms is primarily due to thermal vaporization. The continuous generation of large vapor densities should enable measurements at the single-photon level by averaging over longer time scales. PMID:26565879

  3. Selectivity of ion exchangers in extracting cesium and rubidium from alkaline solutions

    NASA Astrophysics Data System (ADS)

    Shelkovnikova, L. A.; Kargov, S. I.; Gavlina, O. T.; Ivanov, V. A.; Al'tshuler, G. N.

    2013-01-01

    We compare the ion exchange selectivity of phenol-type sorbents based on phenol formaldehyde resins, products of condensation of diatomic phenols with formaldehyde, and crosslinked polymer based on C-phenyl[4]resorcinarene resin, for cesium and rubidium ions. It is shown that phenol formaldehyde sorbents are the ones most selective. The interaction of alkali metal cations with the anion of calix[4]arene is investigated via quantum-chemical modeling. It is shown that the selectivity toward cesium and rubidium ions in ion exchangers of the phenolic type is not due to specific interactions of ions with phenolic groups.

  4. RUBIDIUM, a program for computer-aided assignment of two-dimensional NMR spectra of polypeptides.

    PubMed

    Yu, C; Hwang, J F; Chen, T B; Soo, V W

    1992-01-01

    Taking advantage of the rule-based expert system technology, a program named RUBIDIUM (Rule-Based Identification In 2D NMR Spectrum) was developed to accomplish the automatic 1H NMR resonance assignments of polypeptides. Besides noise elimination and peak selection capabilities, RUBIDIUM detects the cross-peak patterns of amino acid residues in the COSY spectrum, assigning these patterns to amino acid types, performing sequential assignments using combined COSY/NOESY spectra, and finally, achieving the total assignment of the 1H NMR spectrum.

  5. Collisional shift of hyperfine line for rubidium in an atmosphere of the buffer inert gas

    NASA Astrophysics Data System (ADS)

    Glushkov, A. V.; Khetselius, O. Yu; Lopatkin, Y. M.; Florko, T. A.; Kovalenko, O. A.; Mansarliysky, V. F.

    2014-11-01

    New relativistic approach, based on the relativistic many-body perturbation theory using optimized wave functions sets, is applied to calculate the hyper fine structure collision shift for rubidium atom in atmosphere of the helium inert gas. Data for the collisional shifts of the Rb-He system are presented and compared with data available in the literature.

  6. Rydberg-Rydberg interaction in the second-harmonic generation from rubidium atoms

    SciTech Connect

    Melo, Natalia R. de; Vianna, Sandra S.

    2008-02-15

    We report on the observation of long range interaction in the second-harmonic generation from rubidium Rydberg atoms. The asymmetric spectral broadening of the resonant lines provides evidence of the van der Waals interaction between pairs of Rydberg atoms. This effect is investigated when the two-photon transition is resonant with nd levels for n{approx_equal}13.

  7. Preparation of high-principal-quantum-number circular'' states of rubidium

    SciTech Connect

    Nussenzveig, P.; Bernardot, F.; Brune, M.; Hare, J.; Raimond, J.M.; Haroche, S.; Gawlik, W. )

    1993-11-01

    We describe a rubidium circular-state-preparation technique suited to high principal quantum numbers. It combines an excellent selectivity and a good efficiency. Preliminary spectroscopic tests on the [ital n]=50[r arrow][ital n]=51 circular to circular transition at 51 GHz are reported.

  8. Rubidium marking to detect pest and predator dispersal from corn into sorghum and cotton in Georgia

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This field study evaluated marking both the pest Helicoverpa zea (Boddie) and its predator Orius insidiosus (Say) with rubidium chloride (RbCl) in corn to detect their dispersal from corn into sorghum and cotton. Small sorghum and cotton plots were planted at the interface, or common boundary, of co...

  9. Rubidium beam flux dependence of film properties of Ba1 - xRbxBiO3 deposited by molecular-beam epitaxy using distilled ozone

    NASA Astrophysics Data System (ADS)

    Ogihara, M.; Toda, F.; Makita, T.; Abe, H.

    1993-10-01

    We have focused our attention on the dependence of Ba1-xRbxBiO3 (BRBO) film composition ratio and film properties on rubidium-beam-flux intensity. BRBO films were deposited on MgO(100) substrates by molecular-beam epitaxy (MBE) using distilled ozone. Systematic measurements showed that the rubidium content was nearly independent of rubidium-beam-flux intensity in a wide beam-flux range. Therefore, it can be concluded that some degree of self-control of rubidium stoichiometry is actually possible in BRBO film growth by MBE. This study also revealed that the BRBO film properties had strong dependences on rubidium-beam-flux intensity even in the range for self-control of rubudium stoichiometry. Our study also clarified that rubidium-beam flux affects the barium content in the BRBO film.

  10. Autonomous Rubidium Clock Weak Frequency Jump Detector for Onboard Navigation Satellite System.

    PubMed

    Khare, Akshay; Arora, Rajat; Banik, Alak; Mehta, Sanjay D

    2016-02-01

    Frequency jumps are common in rubidium frequency sources. They affect the estimation of user position in navigational satellite systems. These jumps must be detected and corrected immediately as they have direct impact on the navigation system integrity. A novel weak frequency jump detector is proposed based on a Kalman filter with a multi-interval approach. This detector can be applied for both "sudden" and "slow" frequency transitions. In this detection method, noises of clock data are reduced by Kalman filtering, for accurate estimation of jump size with less latency. Analysis on in-orbit rubidium atomic frequency standard (RAFS) phase telemetry data shows that the detector can be used for fast detection and correction of weak frequency jumps. Furthermore, performance comparison of different existing frequency jump detection techniques with the proposed detector is discussed. A multialgorithm-based strategy is proposed depending on the jump size and latency for onboard navigation satellites having RAFS as the primary frequency source.

  11. Highly reliable optical system for a rubidium space cold atom clock.

    PubMed

    Ren, Wei; Sun, Yanguang; Wang, Bin; Xia, Wenbing; Qu, Qiuzhi; Xiang, Jingfeng; Dong, Zuoren; Lü, Desheng; Liu, Liang

    2016-05-01

    We describe a highly reliable optical system designed for a rubidium space cold atom clock (SCAC), presenting its design, key technologies, and optical components. All of the optical and electronic components are integrated onto an optimized two-sided 300  mm×290  mm×30  mm optical bench. The compact optical structure and special thermal design ensure that the optical system can pass all of the space environmental qualification tests including both thermal vacuum and mechanical tests. To verify its performance, the optical system is carefully checked before and after each test. The results indicate that this optical system is suitably robust for the space applications for which the rubidium SCAC was built. PMID:27140378

  12. A Doppler-limited rubidium atlas in ascii format, 9500-12 300 cm -1

    NASA Astrophysics Data System (ADS)

    Ross, Amanda J.; Bertrand, Victor; Harker, Heather; Crozet, Patrick

    2010-11-01

    We present a Doppler-limited transmission spectrum of the rubidium dimer, suitable for frequency calibration of near infrared (e.g. Ti:sapphire) excitation experiments in the region 9500-12 300 cm -1. It provides an abundant source of reference peaks that can be used in a graphic environment to calibrate short (<1 cm -1) scans of excitation spectrum. This is a sequel to an iodine atlas in ascii format [1] that we routinely use for the same purpose in the visible spectrum. The rubidium spectrum was recorded at an instrumental resolution of 0.018 cm -1. Absolute precision is expected to be ˜0.005 cm -1, and relative precision ˜0.003 cm -1. The Rb 2 A-X transmission spectrum is available in ascii format, as supplementary material.

  13. Autonomous Rubidium Clock Weak Frequency Jump Detector for Onboard Navigation Satellite System.

    PubMed

    Khare, Akshay; Arora, Rajat; Banik, Alak; Mehta, Sanjay D

    2016-02-01

    Frequency jumps are common in rubidium frequency sources. They affect the estimation of user position in navigational satellite systems. These jumps must be detected and corrected immediately as they have direct impact on the navigation system integrity. A novel weak frequency jump detector is proposed based on a Kalman filter with a multi-interval approach. This detector can be applied for both "sudden" and "slow" frequency transitions. In this detection method, noises of clock data are reduced by Kalman filtering, for accurate estimation of jump size with less latency. Analysis on in-orbit rubidium atomic frequency standard (RAFS) phase telemetry data shows that the detector can be used for fast detection and correction of weak frequency jumps. Furthermore, performance comparison of different existing frequency jump detection techniques with the proposed detector is discussed. A multialgorithm-based strategy is proposed depending on the jump size and latency for onboard navigation satellites having RAFS as the primary frequency source. PMID:26685233

  14. Rubidium-strontium date of possibly 3 billion years for a granitic rock from antarctica.

    PubMed

    Halpern, M

    1970-09-01

    A single total rock sample of biotite granite from Jule Peaks, Antarctica, has been dated by the rubidium-strontium method at about 3 billion years. The juxtaposition of this sector of Antarctica with Africa in the Dietz and Sproll continental drift reconstruction results in a possible geochronologic fit of the Princess Martha Coast of Antarctica with a covered possible notheastern extension of the African Swaziland Shield, which contains granitic rocks that are also 3 billion years old.

  15. Age Determination by X-ray Fluorescence Rubidium-Strontium Ratio Measurement in Lepidolite.

    PubMed

    Herzog, L F

    1960-07-29

    X-ray fluorescence analysis of several lepidolites whose rubidium and strontium concentrations had already been determined by neutron activation and stable isotope dilution, or both, indicates that this technique can be used for rapid nondestructive reconnaissance rubidiumstrontium studies, and that an x-ray analysis method comparable in accuracy to isotope dilution can probably be developed for dating Precambrian lepidolites, as the simple technique presently used has many obvious possibilities for improvement.

  16. Process for separation of zirconium-88, rubidium-83 and yttrium-88

    DOEpatents

    Heaton, Richard C.; Jamriska, Sr., David J.; Taylor, Wayne A.

    1994-01-01

    A process for selective separation of strontium-82 and strontium-85 from proton irradiated molybdenum targets is provided and includes dissolving the molybdenum target in a hydrogen peroxide solution to form a first ion-containing solution, passing the first ion-containing solution through a first cationic resin whereby ions selected from the group consisting of molybdenum, niobium, technetium, selenium, vanadium, arsenic, germanium, zirconium and rubidium remain in the first ion-containing solution while ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, strontium, yttrium and zirconium are selectively adsorbed by the first resin, contacting the first resin with an acid solution capable of stripping adsorbed ions from the first cationic exchange resin whereby the adsorbed ions are removed from the first resin to form a second ion-containing solution, evaporating the second ion-containing solution for time sufficient to remove substantially all of the acid and water from the second ion-containing solution whereby a residue remains, dissolving the residue from the evaporated second-ion containing solution in a dilute acid to form a third ion-containing solution, said third ion-containing solution having an acid molarity adapted to permit said ions to be adsorbed by a cationic exchange resin, passing the third ion-containing solution through a second cationic resin whereby the ions are adsorbed by the second resin, contacting the second resin with a dilute sulfuric acid solution whereby the adsorbed ions selected from the group consisting of rubidium, zinc, beryllium, cobalt, iron, manganese, chromium, and zirconium are selectively removed from the second resin, and contacting the second resin with a dilute acid solution whereby the adsorbed strontium ions are selectively removed. Zirconium, rubidium, and yttrium radioisotopes can also be recovered with additional steps.

  17. Rubidium marking technique for the European corn borer (Lepidoptera: Pyralidae) in corn

    SciTech Connect

    Legg, D.E.; Chiang, H.C.

    1984-04-01

    Laboratory and greenhouse experiments conducted in 1980 showed that rubidium (Rb) could be used to mark corn plants and emergent European corn borer (ECB), Ostrinia nubilalis (Huebner), moths. Rb had no adverse effects on pre-adult mortality, moth deformity, or fecundity. The best application method for marking ECB moths was an over-the-top + directed foliar spray to the corn plants. 14 references, 1 figure, 4 tables.

  18. Rubidium-strontium and potassium-argon age of lunar sample 15555.

    NASA Technical Reports Server (NTRS)

    Murthy, V. R.; Evensen, N. M.; Jahn, B. M.; Coscio, M. R., Jr.

    1972-01-01

    The lunar mare basalt 15555 from the edge of Hadley Rille has been dated at 3.3 b.y. by both rubidium-strontium and potassium-argon techniques. Age and trace element abundances closely resemble those of the Apollo 12 mare basalts. Data from lunar basalts obtained thus far indicate that they cannot be derived by simple fractionation from a homogeneous source.

  19. Frequency stability of maser oscillators operated with cavity Q. [hydrogen and rubidium masers

    NASA Technical Reports Server (NTRS)

    Tetu, M.; Tremblay, P.; Lesage, P.; Petit, P.; Audoin, C.

    1982-01-01

    The short term frequency stability of masers equipped with an external feedback loop to increase the cavity quality factor was studied. The frequency stability of a hydrogen and a rubidium maser were measured and compared with theoretical evaluation. It is shown that the frequency stability passes through an optimum when the cavity Q is varied. Long term fluctuations are discussed and the optimum mid term frequency stability achievably by small size active and passive H-masers is considered.

  20. Probing dipole-dipole interaction in a rubidium gas via double-quantum 2D spectroscopy.

    PubMed

    Gao, Feng; Cundiff, Steven T; Li, Hebin

    2016-07-01

    We have implemented double-quantum 2D spectroscopy on a rubidium vapor and shown that this technique provides sensitive and background-free detection of the dipole-dipole interaction. The 2D spectra include signals from both individual atoms and interatomic interactions, allowing quantitative studies of the interaction. A theoretical model based on the optical Bloch equations is used to reproduce the experimental spectrum and confirm the origin of double-quantum signals. PMID:27367074

  1. Development of a sub-miniature rubidium oscillator for SEEKTALK application

    NASA Technical Reports Server (NTRS)

    Fruehauf, H.; Weidemann, W.; Jechart, E.

    1981-01-01

    Warm-up and size challenges to oscillator construction are presented as well as the problems involved in these tasks. The performance of M-100 military rubidium oscillator is compared to that of a subminiture rubididum oscillator (M-1000). Methods of achieving 1.5 minute warm-up are discussed as well as improvements in performance under adverse environmental conditions, including temperature, vibration, and magnetics. An attempt is made to construct an oscillator error budget under a set of arbitrary mission conditions.

  2. The physics of the environmental sensitivity of rubidium gas cell atomic frequency standards

    NASA Technical Reports Server (NTRS)

    Riley, William J.

    1990-01-01

    Environmental sensitivity is often the most significant limitation to the practical stability of rubidium frequency standards (RFS). For example, temperature sensitivity can cause a rapid frequency change of several parts in 10(exp 10) for a tactical RFS that has an aging of only 1 times 10(exp -11)/month. Other important environmental factors are barometric pressure, vibration, magnetic field, and nuclear radiation. The physical mechanisms that lie behind these environmental sensitivities are considered. These physical mechanisms are related to the performance of actual rubidium frequency standards. For the user of these devices, a better knowledge of the causes for Rb clock instability will aid in their testing and proper application. For the time frequency specialist, a review of these factors may prove useful toward improving RFS design. Some of the RFS environmental sensitivities are due to simple physical mechanisms like the effect of dc magnetic field on the Rb hyperfine resonance frequency. For these, an analysis can be based on physical principles and straightforward design factors. Other environment factors, like temperature sensitivity, are more complex combinations of many effects, both physical and practical, and the analysis often takes the form of an error budget with large unit-to-unit variations. Today's rubidium frequency standards span a wide performance range from small, inexpensive units with pp 10(exp 10) error budgets to larger, higher performance versions offering pp 10(exp 10) stabilities. For both extremes, however, environmental sensitivity can be the most significant performance limitation. Why this is the case and how to make improvements are discussed.

  3. Kinetics of Alkaline Decomposition and Cyaniding of Argentian Rubidium Jarosite in NaOH Medium

    NASA Astrophysics Data System (ADS)

    Rodríguez, Eleazar Salinas; Sáenz, Eduardo Cerecedo; Ramírez, Marius; Cardona, Francisco Patiño; Labra, Miguel Pérez

    2012-10-01

    The alkaline decomposition of Argentian rubidium jarosite in NaOH media is characterized by an induction period and a progressive conversion period in which the sulfate and rubidium ions pass to the solution, leaving an amorphous iron hydroxide residue. The process is chemically controlled and the order of reaction with respect to hydroxide concentration in the range of 1.75 and 20.4 mol OH- m-3 is 0.94, while activation energy in the range of temperatures of 298 K to 328 K (25 °C to 55 °C) is 91.3 kJ mol-1. Cyaniding of Argentian rubidium jarosite in NaOH media presents a reaction order of 0 with respect to NaCN concentration (in the range of 5 to 41 mol m-3) and an order of reaction of 0.62 with respect to hydroxide concentration, in the range of 1.1 and 30 mol [OH-] m-3. In this case, the cyaniding process can be described, as in other jarosites, as the following two-step process: (1) a step (slow) of alkaline decomposition that controls the overall process followed by (2) a fast step of silver complexation. The activation energy during cyaniding in the range of temperatures of 298 K to 333 K (25 °C to 60 °C) is 43.5 kJ mol-1, which is characteristic of a process controlled by chemical reaction. These results are quite similar to that observed for several synthetic jarosites and that precipitated in a zinc hydrometallurgical plant (Industrial Minera México, San Luis Potosi).

  4. Crystal Structure and Ionic Conductivity of Three Polymorphic Phases of Rubidium Trefluoromethyl Sulfonate, RbSO3CF3

    SciTech Connect

    Hildebrandt,L.; Dinnebier, R.; Jansen, M.

    2006-01-01

    The crystal structures of three polymorphic phases of rubidium trifluoromethyl sulfonate (RbSO{sub 3}CF{sub 3}, rubidium 'triflate') were solved from X-ray powder diffraction data. At room temperature, rubidium triflate crystallizes in the monoclinic space group Cm with lattice parameters of a = 19.9611(5) Angstroms, b = 23.4913(7) Angstroms, c = 5.1514(2) Angstroms, = 102.758(2); Z = 16. At T = 321 K, a first-order phase transition occurs toward a monoclinic phase in space group P2{sub 1} with lattice parameters at T = 344 K of a = 10.3434(5) Angstroms, b = 5.8283(3) Angstroms, c = 5.1982(3) Angstroms, = 104.278(6); Z = (2). At T = 461 K, another phase transition, this time of second order, occurs toward an orthorhombic phase in space group Cmcm with lattice parameters at T = 510 K of a = 5.3069(2) Angstroms, b = 20.2423(10) Angstroms, c = 5.9479(2) Angstroms; Z = 4. As a common feature within all three crystal structures of rubidium triflate, the triflate anions are arranged in double layers with the lipophilic CF{sub 3} groups facing each other. The rubidium ions are located between the SO{sub 3} groups. The general packing is similar to the packing in cesium triflate. Rubidium triflate can be classified as a solid electrolyte with a specific ionic conductivity of = 9.89 x 10{sup -9} S/cm at T = 384 K and = 3.84 x 10{sup -6} S/cm at T = 481 K.

  5. Interim results from the characterization testing of the Engineering Development (EDM) rubidium clocks for satellite applications

    NASA Technical Reports Server (NTRS)

    Powers, Edward D., Jr.; Danzy, Fredrick

    1990-01-01

    Some interim results from the environmental testing program to evaluate the Engineering Design Model (EDM) of the EG and G Spaceborne Rubidium Clock are presented. This effort is in support of the Global Positioning System (GPS) BLOCK IIR program and is intended to characterize the performance of EG and G design for BLOCK IIR satellite applications. Two EG and G EDM units are currently under test at NRL's Clock Test Facility to measure the long-term frequency stability, drift, and frequency versus temperature characteristics.

  6. Electromagnetically induced transparency in rubidium vapor prepared by a comb of short optical pulses

    SciTech Connect

    Sautenkov, Vladimir A.; Rostovtsev, Yuri V.; Ye, C.Y.; Welch, George R.; Kocharovskaya, Olga; Scully, Marlan O.

    2005-06-15

    It was shown by Kocharovskaya and Khanin [Sov. Phys. JETP 63, 945 (1986)] that a comb of optical pulses can induce a ground-state atomic coherence and change the optical response of an atomic medium. In our experiment, we studied the propagation of a comb of optical pulses produced by a mode-locked diode laser in rubidium atomic vapor. Electromagnetically induced transparency (EIT) was observed when the pulse repetition rate is a subharmonic of the hyperfine splitting of the ground state. The width of the EIT resonance is determined by the relaxation rate of the ground-state coherence. Possible applications to magnetometery, atomic clocks, and frequency chains are discussed.

  7. Degenerate mixtures of rubidium and ytterbium for engineering open quantum systems

    NASA Astrophysics Data System (ADS)

    Vaidya, Varun Dilip

    In the last two decades, experimental progress in controlling cold atoms and ions now allows us to manipulate fragile quantum systems with an unprecedented degree of precision. This has been made possible by the ability to isolate small ensembles of atoms and ions from noisy environments, creating truly closed quantum systems which decouple from dissipative channels. However in recent years, several proposals have considered the possibility of harnessing dissipation in open systems, not only to cool degenerate gases to currently unattainable temperatures, but also to engineer a variety of interesting many-body states. This thesis will describe progress made towards building a degenerate gas apparatus that will soon be capable of realizing these proposals. An ultracold gas of ytterbium atoms, trapped by a species-selective lattice will be immersed into a Bose-Einstein condensate (BEC) of rubidium atoms which will act as a bath. Here we describe the challenges encountered in making a degenerate mixture of rubidium and ytterbium atoms and present two experiments performed on the path to creating a controllable open quantum system. The first experiment will describe the measurement of a tune-out wavelength where the light shift of 87Rb vanishes. This wavelength was used to create a species-selective trap for ytterbium atoms. Furthermore, the measurement of this wavelength allowed us to extract the dipole matrix element of the 5s → 6p transition in 87Rb with an extraordinary degree of precision. Our method to extract matrix elements has found use in atomic clocks where precise knowledge of transition strengths is necessary to account for minute blackbody radiation shifts. The second experiment will present the first realization of a degenerate Bose-Fermi mixture of rubidium and ytterbium atoms. Using a three-color optical dipole trap (ODT), we were able to create a highly-tunable, species-selective potential for rubidium and ytterbium atoms which allowed us to use 87

  8. Experimental study of diode pumped rubidium amplifier for single higher-order Laguerre-Gaussian modes.

    PubMed

    Luo, Ruiyao; Li, Lei; Cui, Wenda; Yang, Zining; Wang, Hongyan; Xu, Xiaojun

    2016-06-13

    In this paper, we have set up a diode laser pumped rubidium amplifier for higher-order Laguerre-Gauss (LG) modes. We experimentally realized amplification of higher-order LG modes including helical and sinusoidal LG03, LG13, LG23, and LG33 modes with their high purity held. This novel scheme of generating high-purity higher-order LG beams at high laser power is preferred to the second-generation gravitational wave interferometers. To the best of our knowledge, it is the first time this scheme is formulated. PMID:27410352

  9. A heated vapor cell unit for dichroic atomic vapor laser lock in atomic rubidium.

    PubMed

    McCarron, Daniel J; Hughes, Ifan G; Tierney, Patrick; Cornish, Simon L

    2007-09-01

    The design and performance of a compact heated vapor cell unit for realizing a dichroic atomic vapor laser lock (DAVLL) for the D(2) transitions in atomic rubidium is described. A 5 cm long vapor cell is placed in a double-solenoid arrangement to produce the required magnetic field; the heat from the solenoid is used to increase the vapor pressure and correspondingly the DAVLL signal. We have characterized experimentally the dependence of important features of the DAVLL signal on magnetic field and cell temperature. For the weaker transitions both the amplitude and gradient of the signal are increased by an order of magnitude.

  10. Frequency shifts in a rubidium frequency standard due to coupling to another standard

    NASA Technical Reports Server (NTRS)

    Jaduszliwer, Bernardo; Cook, R. A.; Frueholz, R. P.

    1990-01-01

    Highly reliable timing system, such as used on board satellites, may incorporate a hot standby atomic clock besides the active one. RF couplings between them may affect the performance of the active clock. The effect of such couplings between two rubidium atomic clocks was investigated, and it was found that they will add an oscillatory term to the Allan Variance of the active clock, degrading its frequency stability, and that under certain circumstances they may also shift the active clock's operating frequency. These two effects are discussed in detail, and the level of isolation required to render them negligible is established.

  11. 28W average power hydrocarbon-free rubidium diode pumped alkali laser.

    PubMed

    Zweiback, Jason; Krupke, William F

    2010-01-18

    We present experimental results for a high-power diode pumped hydrocarbon-free rubidium laser with a scalable architecture. The laser consists of a liquid cooled, copper waveguide which serves to both guide the pump light and to provide a thermally conductive surface near the gain volume to remove heat. A laser diode stack, with a linewidth narrowed to approximately 0.35 nm with volume bragg gratings, is used to pump the cell. We have achieved 24W average power output using 4 atmospheres of naturally occurring helium ((4)He) as the buffer gas and 28W using 2.8 atmospheres of (3)He.

  12. A stable frequency comb directly referenced to rubidium electromagnetically induced transparency and two-photon transitions

    SciTech Connect

    Hou, Dong; Wu, Jiutao; Zhang, Shuangyou; Ren, Quansheng; Zhang, Zhigang; Zhao, Jianye

    2014-03-17

    We demonstrate an approach to create a stable erbium-fiber-based frequency comb at communication band by directly locking the combs to two rubidium atomic transitions resonances (electromagnetically induced transparency absorption and two-photon absorption), respectively. This approach directly transfers the precision and stability of the atomic transitions to the comb. With its distinguishing feature of compactness by removing the conventional octave-spanning spectrum and f-to-2f beating facilities and the ability to directly control the comb's frequency at the atomic transition frequency, this stable optical comb can be widely used in optical communication, frequency standard, and optical spectroscopy and microscopy.

  13. Electron and positron scattering on rubidium at 200 eV

    SciTech Connect

    Chin, J. H.; Ratnavelu, K.; Zhou, Y.

    2014-03-05

    The recent implementation of the coupled-channels-optical method (CCOM) [1,2], in the study of the electron and positron-Rubidium(Rb) scattering at intermediate energies [3,4], shows that the continuum effect remains important as the energy increases, even to 100 eV. Here, we study the effect of the continuum in electron and positron scattering on Rb at an even higher energy namely 200 eV. The total, elastic and inelastic integral and differential cross sections are therefore calculated and compared to the available experimental [5] and theoretical data [6,7].

  14. Breast Milk Concentration of Rubidium in Lactating Mothers by Instrumental Neutron Activation Analysis Method

    PubMed Central

    Khatami, Seyedeh-Fatemeh; Parvaresh, Pouya; Parvaresh, Parviz; Madani Kouchak, Sara Sadat; Khorsandi, Jamshid

    2014-01-01

    Objective: Relatively little is known about the trace elements content of human milk from different countries. This has not been fully investigated especially among Iranian women. This study aimed to assess the concentration of Rubidium (Rb) as a poisonous trace element in transitional breast milk of lactating mothers living in Mashhad. Methods: Forty nursing mothers in early lactation 3 days to 15 days postpartum, free from any medical disorder and/or medication were randomly selected. We have applied Instrumental Neutron Activation Analysis (INAA) to assess the long-lived isotope trace element Rb in transitional milk of these economically moderate 18–39 year old Iranian women. Findings: The average concentration level of Rb was 32.176 ppm dry weight (min 8.660, max 107.210 ppm). No significant correlation was observed between Rb concentration and maternal weight and age (P=0.06, P=0.05 respectively) and newborns’ weight, age and sex (P=0.07, P=0.2, P=0.2 respectively). Conclusion: Although the Rubidium concentration found in this study is among the highest reported in the literature, it could not be compared to other studies because of differences in analytical performance, state of lactation, and unavailable reference ranges, so this finding needs further investigations. PMID:26019773

  15. Quantification of the Rubidium in Beverage Products Micro Samples by Platinum-wire Loop in Flame Atomization Atomic Emission Spectrometry.

    PubMed

    Kékedy-Nagy, Ladislau; Zsigmond, Andreea R; Cordoş, Emil A

    2010-12-01

    The rubidium content in 3 µL of some beverage products (beer, wine, vegetable and fruit juices) atomized from a Ptwire in the methaneair flame has been determined by atomic emission spectrometry. The flame atomization conditions of rubidium were optimized, they are: λ = 780.0 nm, the height of 8 mm over the burner head, gas flow rates of 300 L h-1 air and 34 L h-1 methane. The effect of Na, K, Cs, Sr and acetone on the emission of rubidium was studied too. The limit of quantification (6σ) obtained is of 4.3±1.8 pg in the presence of 50 mg L-1 K and 5% v/v acetone (P = 0.05). The rubidium content of the samples has been determined with continuous nebulization and by atomization from the Ptwire, using the standard calibration curve and the standard addition method. The results of the two procedures agree within the determination errors. PMID:24061895

  16. Scanning Tunneling Microscopy and X-Ray Diffraction of Charge Density Wave Materials and the Rubidium Isotope Effect in Superconducting RUBIDIUM(3)CARBON(60)

    NASA Astrophysics Data System (ADS)

    Burk, Brian D.

    We image the surfaces of K_ {0.3}MoO_3 and Rb_{0.3}MoO_3 with scanning tunneling microscopy (STM) above and below the charge density wave (CDW) transition temperature (T_ p). Surprisingly, below T_ p real space and Fourier transformed images show no evidence of CDW modulation, suggesting a relatively small CDW amplitude at the sample surface. Furthermore, the lattice images that we obtained below T_ p are unaffected by the sliding of the CDW. With STM and x-ray diffraction we investigate the CDW domain structure of 1T-TaS_2 in the nearly commensurate (NC), triclinic (T), and incommensurate (I) phases. Fourier transformed STM images of the NC phase show fine satellite structure surrounding CDW peaks. The satellite structure confirms that the apparent domain-like modulation seen in real space images results from a true domain structure rather than from a moire pattern. STM images of the T phase indicate a surface striped domain pattern that is contrary to the previously reported stretched -honeycomb domain structure for the crystal bulk. In the T phase our x-ray diffraction measurements of CDW wave vectors and examination of fine satellite structure surrounding CDW peaks conclusively demonstrate that the bulk domain pattern is striped. We find that the bulk and surface domain structures are identical. X-ray diffraction of the I phase reveals weak satellites near CDW peaks. The satellite structure indicates a short wavelength, periodic amplitude and phase modulation of the CDW in a case where the CDW is far from commensurability. We measure the resistive superconducting transition temperature in C_{60} single crystals intercalated with isotopically pure ^{87}Rb and ^{85 }Rb and with natural abundance rubidium. We obtain a rubidium isotope effect exponent of alpha_{Rb} = -0.028 +/- 0.036, a result which implies that the Rb-C_ {60} optic phonons play at most a minor role in the pairing mechanism of Rb_3C _{60}..

  17. Rubidium titanyl arsenate difference-frequency generation and validation of new Sellmeier coefficients

    NASA Astrophysics Data System (ADS)

    Fenimore, D. L.; Schepler, K. L.; Zelmon, D.; Kück, S.; Ramabadran, U. B.; von Richter, P.; Small, D.

    1996-09-01

    Rubidium titanyl arsenate (RTA), a crystallographic isomorph of potassium titanyl phosphate, shows promise for nonlinear-frequency generation throughout the 1-5- mu m spectral region. Difference-frequency generation in an RTA crystal produced tunable output in the 3.2-4.2- mu m wavelength range. A single 1.064- mu m Nd:YAG laser pumped both a LiNbO3 optical parametric oscillator used to generate a tunable signal beam and the RTA crystal used for difference-frequency generation. Conversion efficiencies were limited to 4% primarily by the large beam divergence of the signal beam. Phase-matching measurements were in excellent agreement with new IR-corrected RTA Sellmeier equations based on refractive-index measurements. .

  18. Ultralow-light-level all-optical transistor in rubidium vapor

    SciTech Connect

    Jing, Jietai Zhou, Zhifan; Liu, Cunjin; Qin, Zhongzhong; Fang, Yami; Zhou, Jun; Zhang, Weiping

    2014-04-14

    An all-optical transistor (AOT) is a device in which one light beam can efficiently manipulate another. It is the foundational component of an all-optical communication network. An AOT that can operate at ultralow light levels is especially attractive for its potential application in the quantum information field. Here, we demonstrate an AOT driven by a weak light beam with an energy density of 2.5 × 10{sup −5} photons/(λ{sup 2}/2π) (corresponding to 6  yJ/(λ{sup 2}/2π) and about 800 total photons) using the double-Λ four-wave mixing process in hot rubidium vapor. This makes it a promising candidate for ultralow-light-level optical communication and quantum information science.

  19. Pulse reshaping in nearly resonant interaction of femtosecond pulses with dense rubidium vapor

    NASA Astrophysics Data System (ADS)

    Vdović, Silvije; Skenderović, Hrvoje; Pichler, Goran

    2016-07-01

    Propagation of intense femtosecond pulses resonant with the atomic rubidium vapor results in phenomenon known as conical emission. The origin of this phenomenon is connected with self-phase modulation in time domain accompanied with spatial self-focusing for blue-detuned pulses. When the laser central wavelength is red-detuned the self-defocusing occurs. Using frequency-resolved optical gating measurements and simple modeling of pulse propagation within the linear dispersion theory it is shown that the retrieved phase of the propagated pulse, and the associated instantaneous frequency, shows evidence of both linear dispersion and self-phase modulation. These results are consistent with the theory of the intensity dependent nonlinear refraction index in medium where linear dispersion contributes significantly to pulse reshaping.

  20. Dynamics of solvation and desolvation of rubidium attached to He nanodroplets

    SciTech Connect

    Vangerow, J. von; John, O.; Stienkemeier, F.; Mudrich, M.

    2015-07-21

    The real-time dynamics of photoexcited and photoionized rubidium (Rb) atoms attached to helium (He) nanodroplets is studied by femtosecond pump-probe mass spectrometry. While excited Rb atoms in the perturbed 6p-state (Rb{sup *}) desorb off the He droplets, Rb{sup +} photoions tend to sink into the droplet interior when created near the droplet surface. The transition from Rb{sup +} solvation to full Rb{sup *} desorption is found to occur at a delay time τ ∼ 600 fs for Rb{sup *} in the 6pΣ-state and τ ∼ 1200 fs for the 6pΠ-state. Rb{sup +}He ions are found to be created by directly exciting bound Rb{sup *}He exciplex states as well as by populating bound Rb{sup +}He-states in a photoassociative ionization process.

  1. Accumulation of myoinositol and rubidium ions in galactose-exposed rat lens

    SciTech Connect

    Kawaba, T.; Cheng, H.M.; Kinoshita, J.H.

    1986-10-01

    When rat lens is incubated in 30 mM galactose overnight, the extent of accumulation of rubidium ions (Rb) and myoinositol (MI) are affected, as well as the Na-K ATPase activity. Rb accumulation and Na-K ATPase activity are only slightly affected compared to the dramatic drop in MI accumulation. These changes are completely abolished by sorbinil, which blocks polyol formation, or by rendering the galactose medium hypertonic to offset the osmotic effect of polyol formation. On the other hand, the addition of excess MI to the galactose medium had no effect on correcting these changes. The results obtained are consistent with the polyol-osmotic theory of sugar cataract formation.

  2. Millimeter wave detection via Autler-Townes splitting in rubidium Rydberg atoms

    SciTech Connect

    Gordon, Joshua A. Holloway, Christopher L.; Schwarzkopf, Andrew; Anderson, Dave A.; Miller, Stephanie; Thaicharoen, Nithiwadee; Raithel, Georg

    2014-07-14

    In this paper, we demonstrate the detection of millimeter waves via Autler-Townes splitting in {sup 85}Rb Rydberg atoms. This method may provide an independent, atom-based, SI-traceable method for measuring mm-wave electric fields, which addresses a gap in current calibration techniques in the mm-wave regime. The electric-field amplitude within a rubidium vapor cell in the WR-10 wave guide band is measured for frequencies of 93.71 GHz and 104.77 GHz. Relevant aspects of Autler-Townes splitting originating from a four-level electromagnetically induced transparency scheme are discussed. We measured the E-field generated by an open-ended waveguide using this technique. Experimental results are compared to a full-wave finite element simulation.

  3. Fractionation of potassium/rubidium by amphiboles: implications regarding mantle composition.

    PubMed

    Hart, S R; Aldrich, L T

    1967-01-20

    We show that the rubidium in amphiboles is generally depleted with respect to potassium. The K:Rb ratios of 50 analyzed amphiboles range from 100 to 5000, averaging 1120. This fractionation effect holds for potassium concentrations ranging from 0.05 to 1.5 percent. The K:Rb ratios of abyssal tholeiites do not place unambiguous limits on the K:Rb ratio of the upper mantle, since partial melting of a mantle material such as amphibole peridotite would produce a liquid with a K:Rb ratio higher than that in the initial material. Large-scale mineralogic control of distributions of trace elements in the mantle could produce trends with depth that are the reverse of trends normally attributed to differentiation processes. PMID:17792059

  4. Efficient light storage with reduced energy loss via nonlinear compensation in rubidium vapor

    NASA Astrophysics Data System (ADS)

    Wang, Gang; Zhou, Wei; Chen, Hong-Li; Xue, Yan; Wu, Jin-Hui; Xu, Huai-Liang; Gao, Jin-Yue

    2016-06-01

    We report an experimental demonstration of efficient light storage based on a modified technique of electromagnetically induced transparency in hot rubidium vapor. By introducing an auxiliary pump field to go beyond the Λ -type configuration, we find that the undesired four-wave mixing can be greatly suppressed to result in sufficiently reduced energy loss of a probe pulse. The light storage efficiency can be as high as  ∼80% within the storage time of 100 ns with the pump field applied, which is almost 6 times larger than that in the absence of the pump field. We may also amend the light storage efficiency in a linear way by increasing the optical depth of our atomic vapor even without saturation effect. We obtain, in fact, an amplified probe pulse via Raman gain during light storage and retrieval, which should have practical applications in classical and quantum information processing.

  5. High polarizability and pyroelectric effect in nonequilibrium nonpolar phases of rubidium dihydroarsenate and potash alum

    SciTech Connect

    Gavrilova, N.D.; Lotonov, A.M.

    1994-08-01

    In this work, the authors studied the thermodynamically nonequilibrium ferroelectriclike state formed under certain conditions in the nonpolar phases of dielectric crystals with hydrogen bonds. This state forms upon fast cooling of a crystal to temperature at which protons can move from their positions into interstices. Studied were the crystals of a ferroelectric: rubidium dihydroarsenate (RDA) with T{sub c}=110 Kelvin, potash alum, and a linear pyroelectric (barium nitrite monohydrate) over the temperature range 245-303 Kelvin. It was found that rapid cooling of some dielectric crystals with hydrogen bonds results in the formation of a metastable, ferroelectric-like state, which is likely to be associated with the formation and self-organization of a system of flickering dipoles caused by interstitial proton vacancies. Upon rapid cooling, the nonpolar phases of the crystals exhibit anomalous pyroelectric and dielectric properties resembling those of ferroelectrics below the Curie point.

  6. Observation of an electromagnetically induced change of absorption in multilevel rubidium atoms

    NASA Astrophysics Data System (ADS)

    Li, Yong-Qing; Jin, Shao-Zheng; Xiao, Min

    1995-03-01

    A 64.4% reduction in absorption at the rubidium D2 line is observed when a pumping field at 775.8 nm is tuned on resonance to the transition between the excited states 5P3/2 and 5D5/2. As the pumping field is tuned off resonance, an absorption peak appears at the side of the Doppler-broadened D2 line. This modification in absorption is related to pumping-induced atomic coherence in this three-level ladder-type system. This experiment is done in a Rb vapor cell at room temperature and with cw diode lasers for both pumping and probe beams in a Doppler-free configuration.

  7. Two-Photon Frequency Comb Excitation of Rubidium Atoms in External Magnetic Field

    NASA Astrophysics Data System (ADS)

    Vujičić, N.; Ban, T.; Skenderović, H.; Vdović, S.; Pichler, G.

    2008-10-01

    In the present experiment the 5S-5D two-photon transitions in 85Rb and 87Rb atoms as a result of the interaction of the femtosecond frequency comb with atomic levels of both rubidium isotopes are investigated. The main problem in studying of two-photon transitions is in optimization of the excitation efficiency of the desired state. There are two general cases: those transition with an intermediate resonance those in which the pulse spectrum is far detuned from an intermediate resonance. In order to investigate the dependence of the two-photon fluorescence signal as a result of interaction of the frequency comb with perturbed energy-level pattern an external magnetic field was applied.

  8. High-precision masses of neutron-deficient rubidium isotopes using a Penning trap mass spectrometer

    SciTech Connect

    Kellerbauer, A.; Audi, G.; Guenaut, C.; Lunney, D.; Beck, D.; Herfurth, F.; Kluge, H.-J.; Weber, C.; Yazidjian, C.; Blaum, K.; Bollen, G.; Schwarz, S.; Herlert, A.; Schweikhard, L.

    2007-10-15

    The atomic masses of the neutron-deficient radioactive rubidium isotopes {sup 74-77,79,80,83}Rb have been measured with the Penning trap mass spectrometer ISOLTRAP. Using the time-of-flight cyclotron resonance technique, relative mass uncertainties ranging from 1.6x10{sup -8} to 5.6x10{sup -8} were achieved. In all cases, the mass precision was significantly improved as compared with the prior Atomic-Mass Evaluation; no significant deviations from the literature values were observed. The exotic nuclide {sup 74}Rb, with a half-life of only 65 ms, is the shortest-lived nuclide on which a high-precision mass measurement in a Penning trap has been carried out. The significance of these measurements for a check of the conserved-vector-current hypothesis of the weak interaction and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix is discussed.

  9. Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance

    NASA Astrophysics Data System (ADS)

    Saliba, Michael; Matsui, Taisuke; Domanski, Konrad; Seo, Ji-Youn; Ummadisingu, Amita; Zakeeruddin, Shaik M.; Correa-Baena, Juan-Pablo; Tress, Wolfgang R.; Abate, Antonio; Hagfeldt, Anders; Grätzel, Michael

    2016-10-01

    All of the cations currently used in perovskite solar cells abide by the tolerance factor for incorporation into the lattice. We show that the small and oxidation-stable rubidium cation (Rb+) can be embedded into a “cation cascade” to create perovskite materials with excellent material properties. We achieved stabilized efficiencies of up to 21.6% (average value, 20.2%) on small areas (and a stabilized 19.0% on a cell 0.5 square centimeters in area) as well as an electroluminescence of 3.8%. The open-circuit voltage of 1.24 volts at a band gap of 1.63 electron volts leads to a loss in potential of 0.39 volts, versus 0.4 volts for commercial silicon cells. Polymer-coated cells maintained 95% of their initial performance at 85°C for 500 hours under full illumination and maximum power point tracking.

  10. Weak-value amplification of the fast-light effect in rubidium vapor

    NASA Astrophysics Data System (ADS)

    Mirhosseini, Mohammad; Viza, Gerardo I.; Magaña-Loaiza, Omar S.; Malik, Mehul; Howell, John C.; Boyd, Robert W.

    2016-05-01

    We use weak-value amplification to enhance the polarization-sensitive fast-light effect from induced Raman absorption in hot rubidium vapor. We experimentally demonstrate that projecting the output signal into an appropriate polarization state enables a pulse advancement of 4.2 μ s , which is more than 15 times larger than that naturally caused by dispersion. More significantly, we show that combining weak-value amplification with the dispersive response of an atomic system provides a clear advantage in terms of the maximum pulse advance achievable for a given value of loss. This technique has potential applications for designing novel quantum-information-processing gates and optical buffers for telecommunication systems.

  11. Signatures of shape transitions in odd-A neutron-rich rubidium isotopes

    SciTech Connect

    Rodriguez-Guzman, R.; Sarriguren, P.; Robledo, L. M.

    2010-12-15

    The isotopic evolution of the ground-state nuclear shapes and the systematics of one-quasiproton configurations are studied in odd-A Rubidium isotopes. We use a self-consistent Hartree-Fock-Bogoliubov formalism based on the Gogny energy density functional with two parametrizations, D1S and D1M, and implemented with the equal-filling approximation. We find clear signatures of a sharp shape transition at N=60 in both the charge radii and spin parity of the ground states, which are robust, consistent with each other, and in agreement with experiment. We point out that the combined analysis of these two observables could be used to predict unambiguously new regions where shape transitions might develop.

  12. Experimental study of linear magnetic dichroism in photoionization satellite transitions of atomic rubidium

    SciTech Connect

    Jaenkaelae, K.; Alagia, M.; Feyer, V.; Richter, R.; Prince, K. C.

    2011-11-15

    Laser orientation in the initial state has been used to study the properties of satellite transitions in inner-shell photoionization of rubidium atoms. The linear magnetic dichroism in the angular distribution (LMDAD) has been utilized to probe the continuum waves of orbital angular momentum conserving monopole, and angular momentum changing conjugate satellites, accompanying the 4p ionization of atomic Rb. We show experimentally that LMDAD of both types of satellite transitions is nonzero and that LMDAD of monopole satellites, measured as a function of photon energy, mimics the LMDAD of direct photoionization, whereas the LMDAD of conjugate transitions deviates drastically from that trend. The results indicate that conjugate transitions cannot be described theoretically without explicit inclusion of electron-electron interaction. The present data can thus be used as a very precise test of current models for photoionization.

  13. Elimination of the light shift in rubidium gas cell frequency standards using pulsed optical pumping

    NASA Technical Reports Server (NTRS)

    English, T. C.; Jechart, E.; Kwon, T. M.

    1978-01-01

    Changes in the intensity of the light source in an optically pumped, rubidium, gas cell frequency standard can produce corresponding frequency shifts, with possible adverse effects on the long-term frequency stability. A pulsed optical pumping apparatus was constructed with the intent of investigating the frequency stability in the absence of light shifts. Contrary to original expectations, a small residual frequency shift due to changes in light intensity was experimentally observed. Evidence is given which indicates that this is not a true light-shift effect. Preliminary measurements of the frequency stability of this apparatus, with this small residual pseudo light shift present, are presented. It is shown that this pseudo light shift can be eliminated by using a more homogeneous C-field. This is consistent with the idea that the pseudo light shift is due to inhomogeneity in the physics package (position-shift effect).

  14. Antiferromagnetism in a bosonic mixture of rubidium ({sup 87}Rb) and potassium ({sup 41}K)

    SciTech Connect

    Shrestha, Uttam

    2010-10-15

    We simulate the experimental possibility of observing antiferromagnetic (AF) order in bosonic mixtures of rubidium ({sup 87}Rb) and potassium ({sup 41}K) in a two-dimensional optical lattice in the presence of harmonic confinement. By tuning the interspecies interactions and the lattice heights, we have found the ground states, within the mean-field approximation, that interpolate from phase separation to AF order. For a moderate lattice height, the coexistence of the Mott and AF phases is possible for the Rb atoms whereas the K atoms remain in the AF-superfluid phase. This observation may provide an experimentally feasible route to hitherto unobserved AF order for {sup 87}Rb-{sup 41}K mixtures.

  15. Trap loss in a metastable helium-rubidium magneto-optical trap

    SciTech Connect

    Byron, L. J.; Dall, R. G.; Truscott, A. G.

    2010-01-15

    We present results of the study of a simultaneously confined metastable helium (He*) and rubidium magneto-optical trap (MOT). By monitoring the trap decay of the {sup 87}Rb MOT with and without a He* MOT present, we find the light-assisted, two-body loss rate to be beta{sub Rb-He}{sup *}=(6+-2)x10{sup -10} cm{sup 3}/s. Moreover, we find that it is possible to create a large, robust {sup 87}Rb-He* MOT, opening the possibility of creating a {sup 87}Rb-He{sup *} Bose-Einstein condensate. This would be the first dual-species condensate incorporating an alkali metal ground-state atom and an excited-state noble gas atom.

  16. Laboratory evaluation of rubidium as a long-lasting marker for bloodfeeding sand flies (Diptera: Psychodidae).

    PubMed

    Mascari, T M; Stout, R W; Foil, L D

    2012-01-01

    The objective of this study was to evaluate the use of the trace element rubidium (Rb) as a long-lasting systemic biomarker for bloodfeeding females of the sand fly Phlebotomus papatasi Scopoli. Baits containing Rb chloride were found to be palatable to hamsters in this study. We were able to detect Rb using a portable X-ray fluorescence analyzer in all sand flies that fed on Rb-treated hamsters for at least 14 d postbloodmeal. We also detected Rb in sand flies that took a bloodmeal from hamsters up to 10 d after the hamsters were withdrawn from a Rb-treated diet. Results of this study constitute proof of concept for the incorporation of Rb chloride into rodent baits for marking bloodfeeding sand flies, and suggest that Rb marking could be used as a technique for evaluating rodent-targeted sand fly control methods and in ecological studies on sand flies.

  17. Photoionization from the 5p {sup 2}P{sub 3/2} state of rubidium

    SciTech Connect

    Nadeem, Ali; Haq, S. U.

    2011-06-15

    We report two-step photoionization studies from the 5p {sup 2}P{sub 3/2} excited state of rubidium using two dye lasers simultaneously pumped by a common Nd:YAG laser in conjunction with a thermionic diode ion detector. The photoionization cross section at the first ionization threshold is measured as 18.8 {+-} 3 Mb and at excess energies of 0.013, 0.106, 0.229, and 0.329 eV is measured as 15, 13.6, 12.6, and 12.5 Mb, respectively. The measured value of the photoionization cross section at the threshold is used to calibrate the oscillator strengths of the 5p {sup 2}P{sub 3/2}{yields}nd {sup 2}D{sub 5/2} (22 {<=}n{<=} 52) Rydberg transitions.

  18. Pump-probe spectroscopy of cold rubidium atoms in an integrating sphere

    NASA Astrophysics Data System (ADS)

    Wang, Wen-Li; Dong, Ri-Chang; Deng, Jian-Liao; Wang, Yu-Zhu

    2016-05-01

    Absorption spectra of cold rubidium atoms in an integrating sphere under the influence of a diffuse laser field have been systematically investigated. A pronounced dispersionlike structure centered at the light-shifted pump frequency is observed with a subnatural linewidth. In particular, two clearly resolved absorption resonances on the 5 S1 /2(F =2 ) →5 P3 /2(F'=3 ) transitions occur with variable probe beam intensity, which is consistent with our proposed theoretical model. Based on the two absorption resonances,we measure the dependence of light shifts, from which we can directly extract the effective Rabi frequency in a diffuse laser field, on the probe laser intensity, pump laser intensity, and pump laser detuning. Our work helps to identify the physical mechanisms behind these spectral features and is beneficial for studying the corresponding effect in a cold sample.

  19. Demonstration of an Exposed-Core Fiber Platform for Two-Photon Rubidium Spectroscopy

    NASA Astrophysics Data System (ADS)

    Perrella, C.; Griesser, H. P.; Light, P. S.; Kostecki, R.; Stace, T. M.; Ebendorff-Heidepriem, H.; Monro, T. M.; White, A. G.; Luiten, A. N.

    2015-07-01

    We demonstrate a promising fiber architecture for generating strong photon-photon interactions. Exposed-core silica optical fibers possess low-loss guidance between 400 and 1700 nm crucial for quantum-logic applications. The potential of this fiber is demonstrated by exciting a two-photon transition within a rubidium vapor using an exposed-core silica optical fiber. Transit-time broadened spectral features enable measurement of the evanescent-field scale length of (120 ±20 ) nm which shows excellent agreement with the characteristics of the modeled fiber mode (118 ±2 ) nm . We observe a two-photon absorption coefficient of 8.3 cm-1 for one optical mode in response to a transmitted power of 1.3 mW in the second mode. A clear pathway to an exposed-core fiber exhibiting substantial absorption mediated by a single photon is identified.

  20. Nonlinear Optics with Tapered Fibers and Magneto-Optically Trapped Rubidium

    NASA Astrophysics Data System (ADS)

    Little, Bethany; Mullarkey, Chris; Howell, John; Vamivakas, Nick; Lin, Qiang

    2016-05-01

    Tapered optical fibers of sub-wavelength diameter present a promising means of integrating the light-atom interaction into larger scale devices. We present work on a tapered fiber system loaded by a magneto optical trap of Rubidium atoms, in which a combination of red and blue detuned beams create a one-dimensional lattice trap along the fiber. The same fiber is used for interacting with the atoms in the trap via the evanescent fields of light propagating along the fiber. Light storage has been demonstrated in a similar system with Cesium, and we believe that much nonlinear optics remains to be explored in this regime. We also plan to see how these nonlinear effects can be enhanced with the addition of a micro-resonator such as the ones in.

  1. Fractionation of potassium/rubidium by amphiboles: implications regarding mantle composition.

    PubMed

    Hart, S R; Aldrich, L T

    1967-01-20

    We show that the rubidium in amphiboles is generally depleted with respect to potassium. The K:Rb ratios of 50 analyzed amphiboles range from 100 to 5000, averaging 1120. This fractionation effect holds for potassium concentrations ranging from 0.05 to 1.5 percent. The K:Rb ratios of abyssal tholeiites do not place unambiguous limits on the K:Rb ratio of the upper mantle, since partial melting of a mantle material such as amphibole peridotite would produce a liquid with a K:Rb ratio higher than that in the initial material. Large-scale mineralogic control of distributions of trace elements in the mantle could produce trends with depth that are the reverse of trends normally attributed to differentiation processes.

  2. Poly[μ(3)-aqua-μ(2)-2,4-dinitro-phenolato-rubidium(I)].

    PubMed

    Yang, Zhangqin; Hu, Mancheng; Wang, Xiuhang

    2007-01-01

    The asymmetric unit of the title compound, [Rb(C(6)H(3)N(2)O(5))(H(2)O)](n), comprises a rubidium cation, a 2,4-dinitro-phenoxide anion and a water mol-ecule. The Rb(+) cation is 11-coordinated by O atoms from 2,4-dinitro-phenolate anions and water mol-ecules. The metal centre is firstly coordinated by two μ(3)-H(2)O to form a one-dimensional ladder-shaped unit, [Rb(2)(μ(3)-H(2)O)(2)], which is further linked by 2,4-dinitro-phenolate to give the three-dimensional framework of the title compound. The crystal structure involves O-H⋯O hydrogen bonds. PMID:21200571

  3. Story of Rubidium-82 and Advantages for Myocardial Perfusion PET Imaging

    PubMed Central

    Chatal, Jean-François; Rouzet, François; Haddad, Ferid; Bourdeau, Cécile; Mathieu, Cédric; Le Guludec, Dominique

    2015-01-01

    Rubidium-82 has a long story, starting in 1954. After preclinical studies in dogs showing that myocardial uptake of this radionuclide was directly proportional to myocardial blood flow (MBF), clinical studies were performed in the 80s leading to an approval in the USA in 1989. From that time, thousands of patients have been tested and their results have been reported in three meta-analyses. Pooled patient-based sensitivity and specificity were, respectively, 0.91 and 0.90. By comparison with 99mTc-SPECT, 82Rb PET had a much better diagnostic accuracy, especially in obese patients with body mass index ≥30 kg/m2 (85 versus 67% with SPECT) and in women with large breasts. A great advantage of 82Rb PET is its capacity to accurately quantify MBF. Quite importantly, it has been recently shown that coronary flow reserve is associated with adverse cardiovascular events independently of luminal angiographic severity. Moreover, coronary flow reserve is a functional parameter particularly useful in the estimate of microvascular dysfunction, such as in diabetes mellitus. Due to the very short half-life of rubidium-82, the effective dose calculated for a rest/stress test is roughly equivalent to the annual natural exposure and even less when stress-only is performed with a low activity compatible with a good image quality with the last generation 3D PET scanners. There is still some debate on the relative advantages of 82Rb PET with regard to 99mTc-SPECT. For the last 10 years, great technological advances substantially improved performances of SPECT with its accuracy getting closer to this of 82Rb/PET. Currently, the main advantages of PET are its capacity to accurately quantify MBF and to deliver a low radiation exposure. PMID:26442267

  4. Story of Rubidium-82 and Advantages for Myocardial Perfusion PET Imaging.

    PubMed

    Chatal, Jean-François; Rouzet, François; Haddad, Ferid; Bourdeau, Cécile; Mathieu, Cédric; Le Guludec, Dominique

    2015-01-01

    Rubidium-82 has a long story, starting in 1954. After preclinical studies in dogs showing that myocardial uptake of this radionuclide was directly proportional to myocardial blood flow (MBF), clinical studies were performed in the 80s leading to an approval in the USA in 1989. From that time, thousands of patients have been tested and their results have been reported in three meta-analyses. Pooled patient-based sensitivity and specificity were, respectively, 0.91 and 0.90. By comparison with (99m)Tc-SPECT, (82)Rb PET had a much better diagnostic accuracy, especially in obese patients with body mass index ≥30 kg/m(2) (85 versus 67% with SPECT) and in women with large breasts. A great advantage of (82)Rb PET is its capacity to accurately quantify MBF. Quite importantly, it has been recently shown that coronary flow reserve is associated with adverse cardiovascular events independently of luminal angiographic severity. Moreover, coronary flow reserve is a functional parameter particularly useful in the estimate of microvascular dysfunction, such as in diabetes mellitus. Due to the very short half-life of rubidium-82, the effective dose calculated for a rest/stress test is roughly equivalent to the annual natural exposure and even less when stress-only is performed with a low activity compatible with a good image quality with the last generation 3D PET scanners. There is still some debate on the relative advantages of (82)Rb PET with regard to (99m)Tc-SPECT. For the last 10 years, great technological advances substantially improved performances of SPECT with its accuracy getting closer to this of (82)Rb/PET. Currently, the main advantages of PET are its capacity to accurately quantify MBF and to deliver a low radiation exposure. PMID:26442267

  5. Crystal Chemistry of the Potassium and Rubidium Uranyl Borate Families Derived from Boric Acid Fluxes

    SciTech Connect

    Wang, Shuao; Alekseev, Evgeny V.; Stritzinger, Jared T.; Depmeier, Wulf; Albrecht-Schmitt, Thomas E.

    2010-07-19

    The reaction of uranyl nitrate with a large excess of molten boric acid in the presence of potassium or rubidium nitrate results in the formation of three new potassium uranyl borates, K{sub 2}[(UO{sub 2}){sub 2}B{sub 12}O{sub 19}(OH){sub 4}]·0.3H{sub 2}O (KUBO-1), K[(UO{sub 2}){sub 2}B{sub 10}O{sub 15}(OH){sub 5}] (KUBO-2), and K[(UO{sub 2}){sub 2}B{sub 10}O{sub 16}(OH){sub 3}]·0.7H{sub 2}O (KUBO-3) and two new rubidium uranyl borates Rb{sub 2}[(UO{sub 2}){sub 2}B{sub 13}O{sub 20}(OH){sub 5}] (RbUBO-1) and Rb[(UO{sub 2}){sub 2}B{sub 10}O{sub 16}(OH){sub 3}]·0.7H{sub 2}O (RbUBO-2). The latter is isotypic with KUBO-3. These compounds share a common structural motif consisting of a linear uranyl, UO{sub 2}{sup 2+}, cation surrounded by BO{sub 3} triangles and BO{sub 4} tetrahedra to create an UO{sub 8} hexagonal bipyramidal environment around uranium. The borate anions bridge between uranyl units to create sheets. Additional BO{sub 3} triangles extend from the polyborate layers and are directed approximately perpendicular to the sheets. All of these compounds adopt layered structures. With the exception of KUBO-1, the structures are all centrosymmetric. All of these compounds fluoresce when irradiated with long-wavelength UV light. The fluorescence spectrum yields well-defined vibronically coupled charge-transfer features.

  6. 2011 investigation of internal contamination with radioactive strontium following rubidium Rb 82 cardiac PET scan.

    PubMed

    Pillai, Satish K; Chang, Arthur; Murphy, Matthew W; Buzzell, Jennifer; Ansari, Armin; Whitcomb, Robert C; Miller, Charles; Jones, Robert; Saunders, David P; Cavicchia, Philip; Watkins, Sharon M; Blackmore, Carina; Williamson, John A; Stephens, Michael; Morrison, Melissa; McNees, James; Murphree, Rendi; Buchanan, Martha; Hogan, Anthony; Lando, James; Nambiar, Atmaram; Torso, Lauren; Melnic, Joseph M; Yang, Lucie; Lewis, Lauren

    2014-01-01

    During routine screening in 2011, US Customs and Border Protection (CBP) identified 2 persons with elevated radioactivity. CBP, in collaboration with Los Alamos National Laboratory, informed the Food and Drug Administration (FDA) that these people could have increased radiation exposure as a result of undergoing cardiac Positron Emission Tomography (PET) scans several months earlier with rubidium Rb 82 chloride injection from CardioGen-82. We conducted a multistate investigation to assess the potential extent and magnitude of radioactive strontium overexposure among patients who had undergone Rb 82 PET scans. We selected a convenience sample of clinical sites in 4 states and reviewed records to identify eligible study participants, defined as people who had had an Rb 82 PET scan between February and July 2011. All participants received direct radiation screening using a radioisotope identifier able to detect the gamma energy specific for strontium-85 (514 keV) and urine bioassay for excreted radioactive strontium. We referred a subset of participants with direct radiation screening counts above background readings for whole body counting (WBC) using a rank ordering of direct radiation screening. The rank order list, from highest to lowest, was used to contact and offer voluntary enrollment for WBC. Of 308 participants, 292 (95%) had direct radiation screening results indistinguishable from background radiation measurements; 261 of 265 (98%) participants with sufficient urine for analysis had radioactive strontium results below minimum detectable activity. None of the 23 participants who underwent WBC demonstrated elevated strontium activity above levels associated with routine use of the rubidium Rb 82 generator. Among investigation participants, we did not identify evidence of strontium internal contamination above permissible levels. This investigation might serve as a model for future investigations of radioactive internal contamination incidents.

  7. Potassium hydrogen trans-glutaconate monohydrate at 295, 245 and 40 K, and its rubidium analogue at 298 K.

    PubMed

    Kashino, S; Taka, J; Fukunaga, T; Ishida, H

    2001-05-01

    A centrosymmetric and short O-H.O hydrogen bond was found in isomorphic crystals of potassium hydrogen trans-glutaconate monohydrate (potassium hydrogen trans-pent-2-ene-1,5-dioate, K(+).C(5)H(5)O(4)(-).H(2)O), (I), and rubidium hydrogen trans-glutaconate monohydrate (rubidium hydrogen trans-pent-2-ene-1,5-dioate, Rb(+).C(5)H(5)O(4)(-).H(2)O), (II). The O.O distance at room temperature is 2.444 (3) A in (I), and 2.417 (4) A in (II). The O.O distance for (I) showed no significant decrease at low temperatures. PMID:11353246

  8. Effects of water concentration in the coating solution on the wall relaxation rate of octadecyltrichlorosilane coated rubidium vapor cells

    SciTech Connect

    Zhang, Guiying; Wei, Lihua; Wang, Meiling; Zhao, Kaifeng

    2015-01-28

    High quality anti-relaxation surface coatings for atomic vapor cells are essential for the preservation of atomic spin coherence and the enhancement of measurement sensitivity. In this paper, we studied the effects of water concentration in octadecyltrichlorosilane (OTS) coating solution on the relaxation rate and its reproducibility of OTS coated Rubidium vapor cells. We found that appropriate water concentration can improve the anti-relaxation performance of OTS coated cells.

  9. Photoassociation and coherent transient dynamics in the interaction of ultracold rubidium atoms with shaped femtosecond pulses. I. Experiment

    NASA Astrophysics Data System (ADS)

    Mullins, Terry; Salzmann, Wenzel; Götz, Simone; Albert, Magnus; Eng, Judith; Wester, Roland; Weidemüller, Matthias; Weise, Fabian; Merli, Andrea; Weber, Stefan M.; Sauer, Franziska; Wöste, Ludger; Lindinger, Albrecht

    2009-12-01

    We experimentally investigate various processes present in the photoassociative interaction of an ultracold atomic sample with shaped femtosecond laser pulses as an detailed extension of previous work [W. Salzmann , Phys. Rev. Lett. 100, 233003 (2008)]. We demonstrate the photoassociation of pairs of rubidium atoms into electronically excited, bound molecular states using spectrally cut femtosecond laser pulses tuned below the rubidium D1 or D2 asymptote. Time-resolved pump-probe spectra reveal oscillations of the molecular formation rate, which are due to coherent transient dynamics in the electronic excitation. The oscillation frequency corresponds to the detuning of the spectral cut position to the asymptotic transition frequency of the rubidium D1 or D2 lines, respectively. Measurements of the molecular photoassociation signal as a function of the pulse energy reveal a nonlinear dependence and indicate a nonperturbative excitation process. Chirping the association laser pulse allowed us to change the phase of the coherent transients. Furthermore, a signature for molecules in the electronic ground state is found, which is attributed to molecule formation by femtosecond photoassociation followed by spontaneous decay. In a subsequent article [A. Merli , Phys. Rev. A 80, 063417 (2009)] quantum mechanical calculations are presented, which compare well with the experimental data and reveal further details about the observed coherent transient dynamics.

  10. Photoassociation and coherent transient dynamics in the interaction of ultracold rubidium atoms with shaped femtosecond pulses. I. Experiment

    SciTech Connect

    Mullins, Terry; Salzmann, Wenzel; Goetz, Simone; Albert, Magnus; Eng, Judith; Wester, Roland; Weidemueller, Matthias; Weise, Fabian; Merli, Andrea; Weber, Stefan M.; Sauer, Franziska; Woeste, Ludger; Lindinger, Albrecht

    2009-12-15

    We experimentally investigate various processes present in the photoassociative interaction of an ultracold atomic sample with shaped femtosecond laser pulses as an detailed extension of previous work [W. Salzmann et al., Phys. Rev. Lett. 100, 233003 (2008)]. We demonstrate the photoassociation of pairs of rubidium atoms into electronically excited, bound molecular states using spectrally cut femtosecond laser pulses tuned below the rubidium D{sub 1} or D{sub 2} asymptote. Time-resolved pump-probe spectra reveal oscillations of the molecular formation rate, which are due to coherent transient dynamics in the electronic excitation. The oscillation frequency corresponds to the detuning of the spectral cut position to the asymptotic transition frequency of the rubidium D{sub 1} or D{sub 2} lines, respectively. Measurements of the molecular photoassociation signal as a function of the pulse energy reveal a nonlinear dependence and indicate a nonperturbative excitation process. Chirping the association laser pulse allowed us to change the phase of the coherent transients. Furthermore, a signature for molecules in the electronic ground state is found, which is attributed to molecule formation by femtosecond photoassociation followed by spontaneous decay. In a subsequent article [A. Merli et al., Phys. Rev. A 80, 063417 (2009)] quantum mechanical calculations are presented, which compare well with the experimental data and reveal further details about the observed coherent transient dynamics.

  11. Activity of rubidium and cesium in soybean looper (Lepidoptera: Noctuidae): insect feeding on cotton and soybean measured by elemental markers.

    PubMed

    Jost, Douglas J; Pitre, Henry N

    2002-04-01

    Uptake and translocation of the elemental markers rubidium (Rb) and cesium (Cs) within adult soybean looper, Pseudoplusia includens (Walker), were determined using atomic absorption spectrophotometry in the laboratory in various feeding and mating treatments. Neonates were tested to determine marker transfer from male and female adults fed rubidium chloride (RbCl)-treated artificial nectar, cesium chloride (CsCI)-treated artificial nectar, or both. All females contained detectable levels of Rb, Cs, or both, which were obtained either through direct feeding or via spermatophores. Rubidium was present in females at significantly greater levels than Cs. No significant differences in Rb levels were observed between feeding or spermatophore acquisitions. Most neonates had significantly higher levels of Rb than Cs. In a field cage study to evaluate adult feeding and oviposition behavior on blooming cotton and blooming soybean treated with RbCl and CsCl, respectively, more eggs contained Rb than Cs, indicating greater feeding on cotton nectar than soybean nectar, regardless of the host plant upon which eggs were laid. Females laid more eggs on blooming soybean than on blooming cotton. Higher levels of Rb in cotton than Cs in soybean were recorded and may be attributed to initial elemental marker quantities available to the insects. This study provides the support for the generalized observations that soybean looper infestations in soybean can be related to feeding activities by adults in cotton.

  12. The first rubidium rare-earth(III) thiophosphates: Rb 3M3[PS 4] 4 ( M=Pr, Er)

    NASA Astrophysics Data System (ADS)

    Komm, Theresa; Schleid, Thomas

    2005-02-01

    The two non-isotypical rubidium rare-earth(III) thiophosphates Rb 3M3[PS 4] 4 of praseodymium and erbium can easily be obtained by the stoichiometric reaction of the respective rare-earth metal, red phosphorus and sulfur with an excess of rubidium bromide (RbBr) as flux and rubidium source at 950°C for 14 days in evacuated silica tubes. The pale green platelet-shaped single crystals of Rb 3Pr 3[PS 4] 4 as well as the pink rods of Rb 3Er 3[PS 4] 4 are moisture sensitive. Rb 3Pr 3[PS 4] 4 crystallizes triclinically in the space group P1¯ ( a=926.79(5) pm, b=1050.83(5) pm, c=1453.28(7) pm, α=84.329(4)°, β=88.008(4)°, γ=80.704(4)°; Z=2), Rb 3Er 3[PS 4] 4 monoclinically in the space group P21/n ( a=915.97(5) pm, b=1575.86(7) pm, c=1843.32(9) pm, β=95.601(6)°; Z=4). In both structures, there are three crystallographically different rare-earth cations present. ( M1) 3+ is eightfold coordinated in the shape of a square antiprism, ( M2) 3+ and ( M3) 3+ are both surrounded by eight sulfur atoms as bicapped trigonal prisms each with a coordination number of eight as well as for the praseodymium, but better described as CN=7+1 in the case of the erbium compound. These [ MS 8] 13- polyhedra form a layer according to ∞2{[M3[PS]4]} by sharing edges with the isolated [PS 4] 3- tetrahedra ( d(P-S)=200-209 pm, ∢(S-P-S)=102-116°). These layers are stacked with a repetition period of three in the case of the praseodymium compound, but of only two for the erbium analog. The rubidium cation (Rb1) + is located in cavities of these layers and tenfold coordinated in the shape of a tetracapped trigonal antiprism. The also tenfold but more irregularly coordinated rubidium cations (Rb2) + and (Rb3) + reside between the layers.

  13. Measurements of myocardial flow vs. extraction of rubidium under varying physiological conditions

    SciTech Connect

    Budinger, T.F.; Yano, Y.; Moyer, B.R.; Twitchell, J.A.; Brennan, K.M.; Huesman, R.H.

    1984-01-01

    The relationship between myocardial rubidium extraction (E) and flow (F) are well described by the single capillary model E = (1-exp(-PS/F)) with a permeability surface product PS = 0.87 cc/min/gm. Some effects of alkalosis and acidosis have been reported. Here the authors investigate the effects of dipyridamole, norepinephrine-atropine, exsanguination, pacing, ouabain and calcium on extraction using Rb-82 PET and Rb-86 acute studies with microspheres in dogs. Thoracotomies were performed for left atrial microsphere infusion. Anesthesia was by N/sub 2/O and methoxyflurane. The degree of exsanguination, drug levels administered and pacing rates were sufficient to produce flow modifications. Extraction was calculated by dividing FE from Rb observations by F from microsphere data. These results of extraction vs. flow do not show a significant dependence on the method used for flow modification. There was less than a 20% change in FE after an infusion of 0.04 mg/kg ouabain over 5 minutes in 3 replicate studies each on 4 dogs. An important finding not previously explained in flow vs. extraction studies is the occurrence of extraction values greater than 1.0 which is possible only if the distribution opportunities of small cations are greater than that of microspheres. This is equivalent to the well known hematocrit effect in small channels.

  14. A waveguide frequency converter connecting rubidium-based quantum memories to the telecom C-band.

    PubMed

    Albrecht, Boris; Farrera, Pau; Fernandez-Gonzalvo, Xavier; Cristiani, Matteo; de Riedmatten, Hugues

    2014-02-27

    Coherently converting the frequency and temporal waveform of single and entangled photons will be crucial to interconnect the various elements of future quantum information networks. Of particular importance is the quantum frequency conversion of photons emitted by material systems able to store quantum information, so-called quantum memories. There have been significant efforts to implement quantum frequency conversion using nonlinear crystals, with non-classical light from broadband photon-pair sources and solid-state emitters. However, solid state quantum frequency conversion has not yet been achieved with long-lived optical quantum memories. Here we demonstrate an ultra-low-noise solid state photonic quantum interface suitable for connecting quantum memories based on atomic ensembles to the telecommunication fibre network. The interface is based on an integrated-waveguide nonlinear device. We convert heralded single photons at 780 nm from a rubidium-based quantum memory to the telecommunication wavelength of 1,552 nm, showing significant non-classical correlations between the converted photon and the heralding signal.

  15. Does the light shift drive frequency aging in the rubidium atomic clock?

    PubMed

    Camparo, James

    2005-07-01

    Frequency aging in the rubidium (Rb) vapor-cell atomic clock plays a significant role in the device's timekeeping ability. Though many researchers have speculated on the physical mechanism(s) driving the linear, deterministic frequency change (i.e., deltaf(t)/fo = At), there is little unambiguous experimental data regarding the phenomenon. Here, long-term data were used from on-orbit global positioning system (GPS) Rb clocks to examine one postulated mechanism for frequency aging (i.e., the light-shift effect). Defining the light shift of the clock's fractional frequency as alphaI/Io, where alpha is the light-shift coefficient, we find that temporal variations of the relative light intensity, I/Io, cannot account for frequency aging. However, for the population of clocks considered here, we obtain the intriguing result that alpha/A = 1.7 +/- 1.5. Thus, it may be that frequency aging is driven by the light-shift effect through temporal variations of the light-shift coefficient.

  16. Search for collisional exchange of ground-state atomic alignment between rubidium isotopes

    NASA Astrophysics Data System (ADS)

    Bahr, E. J.; Kimball, D. F. Jackson; Coste, B.; Rangwala, S. A.; Higbie, J. M.; Ledbetter, M. P.; Rochester, S. M.; Yashchuk, V. V.; Budker, D.

    2009-05-01

    The collisional transfer of pure atomic alignment (related to coherences between Zeeman sublevels with δM=2) between isotopes of rubidium is searched for using time-dependent magneto-optical rotation. Alignment-exchange collisions are fundamentally different than the commonly studied orientation-exchange collisions: for example, spin-exchange collisions preserve the net orientation in an atomic vapor (because of angular momentum conservation) but do not conserve alignment. Collisional transfer of alignment in alkali atoms has seldom been studied because the cross-sections are expected to be three to four orders of magnitude smaller than the nominal spin-exchange cross-sections. This is due to the fact that ground-state alkali atoms have electronic angular momentum J=1/2 and so the electronic state cannot support a δM=2 coherence. Thus collisional transfer of alignment is only possible because of hyperfine re-coupling during the collision. Implications of the measurement for searches for anomalous spin-dependent forces will be discussed.

  17. Miniature atomic scalar magnetometer for space based on the rubidium isotope 87Rb

    NASA Astrophysics Data System (ADS)

    Korth, Haje; Strohbehn, Kim; Tejada, Francisco; Andreou, Andreas G.; Kitching, John; Knappe, Svenja; Lehtonen, S. John; London, Shaughn M.; Kafel, Matiwos

    2016-08-01

    A miniature atomic scalar magnetometer based on the rubidium isotope 87Rb was developed for operation in space. The instrument design implements both Mx and Mz mode operation and leverages a novel microelectromechanical system (MEMS) fabricated vapor cell and a custom silicon-on-sapphire (SOS) complementary metal-oxide-semiconductor (CMOS) integrated circuit. The vapor cell has a volume of only 1 mm3 so that it can be efficiently heated to its operating temperature by a specially designed, low-magnetic-field-generating resistive heater implemented in multiple metal layers of the transparent sapphire substrate of the SOS-CMOS chips. The SOS-CMOS chip also hosts the Helmholtz coil and associated circuitry to stimulate the magnetically sensitive atomic resonance and temperature sensors. The prototype instrument has a total mass of fewer than 500 g and uses less than 1 W of power, while maintaining a sensitivity of 15 pT/√Hz at 1 Hz, comparable to present state-of-the-art absolute magnetometers.

  18. Observation of picosecond superfluorescent pulses in rubidium atomic vapor pumped by 100-fs laser pulses

    SciTech Connect

    Ariunbold, Gombojav O.; Kash, Michael M.; Sautenkov, Vladimir A.; Li, Hebin; Welch, George R.; Rostovtsev, Yuri V.; Scully, Marlan O.

    2010-10-15

    We study the superfluorescence (SF) from a gas of rubidium atoms. The atoms of a dense vapor are excited to the 5D state from the 5S state by a two-photon process driven by 100-fs laser pulses. The atoms decay to the 6P state and then to the 5S state. The SF emission at 420 nm on the 6P-5S transition is recorded by a streak camera with picosecond time resolution. The time duration of the generated SF is tens of picoseconds, which is much shorter than the time scale of the usual relaxation processes, including spontaneous emission and atomic coherence dephasing. The dependence of the time delay between the reference input pulse and SF is measured as a function of laser power. The experimental data are described quantitatively by a simulation based on the semiclassical atom-field interaction theory. The observed change in scaling laws for the peak intensity and delay time can be elucidated by an SF theory in which the sample length is larger than the cooperation length.

  19. Myocardial perfusion of infarcted and normal myocardium in propofol-anesthetized minipigs using (82)Rubidium PET.

    PubMed

    Rasmussen, Thomas; Follin, Bjarke; Kastrup, Jens; Christensen, Thomas Emil; Hammelev, Karsten Pharao; Kjær, Andreas; Hasbak, Philip

    2016-06-01

    Cardiac Rubidium-82 ((82)Rb) positron-emission-tomography (PET) is a good method for quantification of myocardial blood flow in man. Quantification of myocardial blood flow in animals to evaluate new treatment strategies or to understand underlying disease is also of great interest but raises some challenges. Animals, which have been anesthetized during PET acquisition, might react differently to used stress medications, and therefore difficulties might exist while evaluating the resulting PET images using standard software packages from commercial vendors optimized for human hearts. Furthermore propofol, used for anesthesia, can influence myocardial perfusion and coronary flow reserve due to its vasorelaxant effect, and interactions might exist between propofol and used stress agents, potentially affecting the result of the examination. We present cardiac (82)Rb-PET studies performed in propofol-anesthetized minipigs with normal and infarcted myocardium stressed with both adenosine and dipyridamole. Despite the mentioned challenges, we were able to trace the small minipig heart with software designed for human cardiac PET and to achieve blood flow measurements comparable with results in humans with both adenosine and dipyridamole. We found dipyridamole to be a superior stress agent for this experimental setup. Finally, we were able to clearly identify the myocardial perfusion defect after an induced myocardial infarction. PMID:26931633

  20. Quantitative myocardial blood flow with Rubidium-82 PET: a clinical perspective.

    PubMed

    Hagemann, Christoffer E; Ghotbi, Adam A; Kjær, Andreas; Hasbak, Philip

    2015-01-01

    Positron emission tomography (PET) allows assessment of myocardial blood flow in absolute terms (ml/min/g). Quantification of myocardial blood flow (MBF) and myocardial flow reserve (MFR) extend the scope of conventional semi-quantitative myocardial perfusion imaging (MPI): e.g. in 1) identification of the extent of a multivessel coronary artery disease (CAD) burden, 2) patients with balanced 3-vessel CAD, 3) patients with subclinical CAD, and 4) patients with regional flow variance, despite of a high global MFR. A more accurate assessment of the ischemic burden in patients with intermediate pretest probability of CAD can support the clinical decision-making in treatment of CAD patients as a complementary tool to the invasive coronary angiography (CAG). Recently, several studies have proven Rubidium-82 ((82)Rb) PET's long-term prognostic value by a significant association between compromised global MFR and major adverse cardiovascular events (MACE), and together with new diagnostic possibilities from measuring the longitudinal myocardial perfusion gradient, cardiac (82)Rb PET faces a promising clinical future. This article reviews current evidence on quantitative (82)Rb PET's ability to diagnose and risk stratify CAD patients, while assessing the potential of the modality in clinical practice. PMID:26550537

  1. Short-pulse photoassociation in rubidium below the D{sub 1} line

    SciTech Connect

    Koch, Christiane P.; Kosloff, Ronnie; Masnou-Seeuws, Francoise

    2006-04-15

    Photoassociation of two ultracold rubidium atoms and the subsequent formation of stable molecules in the singlet ground and lowest triplet states is investigated theoretically. The method employs laser pulses inducing transitions via excited states correlated to the 5S+5P{sub 1/2} asymptote. Weakly bound molecules in the singlet ground or lowest triplet state can be created by a single pulse while the formation of more deeply bound molecules requires a two-color pump-dump scenario. More deeply bound molecules in the singlet ground or lowest triplet state can be produced only if efficient mechanisms for both pump and dump steps exist. While long-range 1/R{sup 3} potentials allow for efficient photoassociation, stabilization is facilitated by the resonant spin-orbit coupling of the 0{sub u}{sup +} states. Molecules in the singlet ground state bound by a few wave numbers can thus be formed. This provides a promising first step toward ground-state molecules which are ultracold in both translational and vibrational degrees of freedom.

  2. The kinetics and mechanism of nanoconfined molten salt reactions: trimerization of potassium and rubidium dicyanamide.

    PubMed

    Yancey, Benjamin; Vyazovkin, Sergey

    2015-04-21

    This study highlights the effect of the aggregate state of a reactant on the reaction kinetics under the conditions of nanoconfinement. Our previous work (Phys. Chem. Chem. Phys., 2014, 16, 11409) has demonstrated considerable deceleration of the solid state trimerization of sodium dicyanamide in organically modified silica nanopores. In the present study we use FTIR, NMR, pXRD, TGA and DSC to analyze the kinetics and mechanism of the liquid state trimerization of potassium and rubidium dicyanamide under similar conditions of nanoconfinement. It is found that nanoconfinement accelerates dramatically the kinetics of the liquid state trimerization, whereas it does not appear to affect the reaction mechanism. Kinetic analysis indicates that the acceleration is associated with an increase in the preexponential factor. Although nanoconfinement has the opposite effects on the respective kinetics of solid and liquid state trimerization, both effects are linked to a change in the preexponential factor. The results obtained are consistent with our hypothesis that the effects differ because nanoconfinement may promote disordering of the solid and ordering of the liquid reaction media.

  3. A Subfemtotesla Atomic Magnetometer Based on Hybrid Optical Pumping of Potassium and Rubidium

    NASA Astrophysics Data System (ADS)

    Li, Yang; Cai, Hongwei; Ding, Ming; Quan, Wei; Fang, Jiancheng

    2016-05-01

    Atomic magnetometers, based on detection of Larmor spin precession of optically pumped atoms, have been researched and applied extensively. Higher sensitivity and spatial resolution combined with no cryogenic cooling of atomic magnetometers would enable many applications with low cost, including the magnetoencephalography (MEG). Ultrahigh sensitivity atomic magnetometer is considered to be the main development direction for the future. Hybrid optical pumping has been proposed to improve the efficiency of nuclear polarization. But it can also be used for magnetic field measurement. This method can control absorption of optical pumping light, which is benefit for improving the uniformity of alkali metal atoms polarization and the sensitivity of atomic magnetometer. In addition, it allows optical pumping in the absence of quenching gas. We conduct experiments with a hybrid optically pumped atomic magnetometer using a cell containing potassium and rubidium. By adjusting the density ratio of alkali metal and the pumping laser conditions, we measured the magnetic field sensitivity better than 0.7 fT/sqrt(Hz).

  4. Analysis of characteristics of a diode-pumped rubidium vapour laser using a kinetic algorithm

    NASA Astrophysics Data System (ADS)

    Cai, He; Wang, You; Zhang, Wei; Xue, Liangping; Wang, Hongyuan; Han, Juhong; An, Guofei; Jiang, Zhigang; Gao, Ming; Zhou, Jie; Liao, Zhiye

    2016-08-01

    We consider diode-pumped alkali vapour lasers (DPALs), which make it possible to achieve a high output power. Characteristics of such DPALs strongly depend on the physical properties of buffer gases and on structural parameters of a vapour cell. Special attention is paid to a diode-pumped rubidium vapour laser (DPRVL): We have investigated the effect of different conditions on its characteristics. The results show that the linewidth of the D2 line of a DPRVL and the fine-structure mixing rate between two excited energy levels, which are two crucial factors in implementing a high-power DPRVL, increase with the pressure of buffer gases and the temperature of the vapour cell. It is demonstrated that the population ratio of two excited energy levels is close to that corresponding to a thermal equilibrium as the pressure of buffer gases and the temperature of the vapour cell become higher. We have found that the optimal values of the methane pressure, the cell temperature and the cell length can be determined through a kinetic analysis. The conclusions can be valuable for designing configurations of an end-pumped DPAL.

  5. Narrow-band N-resonance formed in thin rubidium atomic layers

    SciTech Connect

    Sargsyan, A.; Mirzoyan, R.; Sarkisyan, D.

    2012-11-15

    The narrow-band N-resonance formed in a {Lambda} system of D{sub 1}-line rubidium atoms is studied in the presence of a buffer gas (neon) and the radiations of two continuous narrow-band diode lasers. Special-purpose cells are used to investigate the dependence of the process on vapor column thickness L in millimeter, micrometer, and nanometer ranges. A comparison of the dependences of the N-resonance and the electromagnetically induced transparency (EIT) resonance on L demonstrates that the minimum (record) thickness at which the N-resonance can be detected is L = 50 {mu}m and that a high-contrast EIT resonance can easily be formed even at L Almost-Equal-To 800 nm. The N-resonance in a magnetic field for {sup 85}Rb atoms is shown to split into five or six components depending on the magnetic field and laser radiation directions. The results obtained indicate that levels F{sub g} = 2, 3 are initial and final in the N-resonance formation. The dependence of the N-resonance on the angle between the laser beams is analyzed, and practical applications are noted.

  6. Rubidium marking of Anopheles mosquitoes detectable by field-capable X-ray spectrometry.

    PubMed

    Wilkins, E E; Smith, S C; Roberts, J M; Benedict, M

    2007-06-01

    We present a mosquito marking technique suitable for mark-release-recapture that can be used with a hand-held, portable X-ray fluorescence (XRF) spectrometer, which is practical for field measurements. Third instar Anopheles gambiae Giles sensu stricto (Diptera: Culicidae) and Anopheles stephensi Liston larvae were cultured to pupation in water containing rubidium (Rb) Cl at concentrations up to 1000 p.p.m. Rb. Anopheles gambiae larvae survived to adulthood at concentrations as high as 1000 p.p.m. Rb but suffered pupal mortality and reduced adult longevity at high concentrations. We were able to culture An. stephensi at Rb concentrations as high as 300 p.p.m. The presence of Rb in adults was evaluated using a portable XRF analyser, and we were able to reliably detect Rb above background levels in 10-day-old females and 4-day-old males at concentrations causing minimal pupal or adult mortality. We observed that Rb marking was not permanent, and the concentration declined significantly as adults aged. The low cost of labelling with RbCl and the field portability of the spectrometer provide a useful means for labelling mosquitoes via breeding sites or in the laboratory for mark-release-recapture experiments.

  7. Test-Retest Repeatability of Myocardial Blood Flow Measurements using Rubidium-82 Positron Emission Tomography

    NASA Astrophysics Data System (ADS)

    Efseaff, Matthew

    Rubidium-82 positron emission tomography (PET) imaging has been proposed for routine myocardial blood flow (MBF) quantification. Few studies have investigated the test-retest repeatability of this method. Same-day repeatability of rest MBF imaging was optimized with a highly automated analysis program using image-derived input functions and a dual spillover correction (SOC). The effects of heterogeneous tracer infusion profiles and subject hemodynamics on test-retest repeatability were investigated at rest and during hyperemic stress. Factors affecting rest MBF repeatability included gender, suspected coronary artery disease, and dual SOC (p < 0.001). The best repeatability coefficient for same-day rest MBF was 0.20 mL/min/g using a six-minute scan-time, iterative reconstruction, dual SOC, resting rate-pressure-product (RPP) adjustment, and a left atrium image-derived input function. The serial study repeatabilities of the optimized protocol in subjects with homogeneous RPPs and tracer infusion profiles was 0.19 and 0.53 mL/min/g at rest and stress, and 0.95 for stress / rest myocardial flow reserve (MFR). Subjects with heterogeneous tracer infusion profiles and hemodynamic conditions had significantly less repeatable MBF measurements at rest, stress, and stress/rest flow reserve (p < 0.05).

  8. Quantitative myocardial blood flow with Rubidium-82 PET: a clinical perspective

    PubMed Central

    Hagemann, Christoffer E; Ghotbi, Adam A; Kjær, Andreas; Hasbak, Philip

    2015-01-01

    Positron emission tomography (PET) allows assessment of myocardial blood flow in absolute terms (ml/min/g). Quantification of myocardial blood flow (MBF) and myocardial flow reserve (MFR) extend the scope of conventional semi-quantitative myocardial perfusion imaging (MPI): e.g. in 1) identification of the extent of a multivessel coronary artery disease (CAD) burden, 2) patients with balanced 3-vessel CAD, 3) patients with subclinical CAD, and 4) patients with regional flow variance, despite of a high global MFR. A more accurate assessment of the ischemic burden in patients with intermediate pretest probability of CAD can support the clinical decision-making in treatment of CAD patients as a complementary tool to the invasive coronary angiography (CAG). Recently, several studies have proven Rubidium-82 (82Rb) PET’s long-term prognostic value by a significant association between compromised global MFR and major adverse cardiovascular events (MACE), and together with new diagnostic possibilities from measuring the longitudinal myocardial perfusion gradient, cardiac 82Rb PET faces a promising clinical future. This article reviews current evidence on quantitative 82Rb PET’s ability to diagnose and risk stratify CAD patients, while assessing the potential of the modality in clinical practice. PMID:26550537

  9. catena-Poly[[diaqua-rubidium(I)](μ(2)-3-carboxy-pyrazine-2-carboxyl-ato)(μ(2)-pyrazine-2,3-dicarboxylic acid)].

    PubMed

    Tombul, Mustafa; Guven, Kutalmis

    2009-01-01

    The structural unit of the title compound, [Rb(C(6)H(3)N(2)O(4))(C(6)H(4)N(2)O(4))(H(2)O)(2)](n), consists of one rubidium cation, one hydrogen pyrazine-2,3-dicarboxyl-ate anion, one pyrazine-2,3-dicarboxylic acid mol-ecule and two water mol-ecules. This formulation is repeated twice in the asymmetric unit as the rubidium cation lies on an inversion centre. Each anion or acid mol-ecule is linked to two rubidium cations, while the rubidium cation has close contacts to four symmetry-equivalent organic ligands, with two different coordination modes towards this cation. In addition, each rubidium cation is coordinated by two water O atoms, raising the coordination number to eight. One of the carboxyl groups of the acid holds its H atom, which forms a hydrogen bond to a coordinated water mol-ecule. The other carboxyl group is deprotonated in half of the ligands and protonated in the other half, taking part in a strong O-H⋯O hydrogen bond disordered over an inversion centre. The stabil-ization of the crystal structure is further assisted by O-H⋯O and O-H⋯N hydrogen-bonding inter-actions involving the water mol-ecules and carboxyl-ate O atoms. PMID:21581808

  10. Synthesis of novel ion-imprinted polymeric nanoparticles based on dibenzo-21-crown-7 for the selective pre-concentration and recognition of rubidium ions.

    PubMed

    Hashemi, Beshare; Shamsipur, Mojtaba

    2015-12-01

    In this work, we report the first application of ion-imprinted technology via precipitation polymerization for simple and practical determination of rubidium ions. The rubidium-ion-imprinted polymer nanoparticles were prepared using dibenzo-21-crown-7 as a selective ligand, methacrylic acid as functional monomer, ethylene glycol dimethacrylate as cross linker, and 2,2'-azobisisobutyronitrile as radical initiator. The resulting powder material was characterized using scanning electron microscopy, which showed colloidal nanoparticles of 100-200 nm in diameter and slightly irregular in shape. The maximum adsorption capacity of the ion imprinted particles was 63.36 μmol/g. The experimental conditions such as nature and concentration of eluent, pH, adsorption and desorption times, weight of the polymer material, aqueous phase and desorption agent volumes were also studied. Finally, selectivity of the prepared IIP particles toward rubidium ion was investigated in the presence of some foreign metal ions. PMID:26462738

  11. RUBIDIUM ABUNDANCES IN THE GLOBULAR CLUSTERS NGC 6752, NGC 1904, AND NGC 104 (47 Tuc)

    SciTech Connect

    D'Orazi, Valentina; Lugaro, Maria; Campbell, Simon W.; Bragaglia, Angela; Carretta, Eugenio; Gratton, Raffaele G.; Lucatello, Sara; D'Antona, Francesca

    2013-10-10

    Large star-to-star variations of the abundances of proton-capture elements, such as Na and O, in globular clusters (GCs) are interpreted as the effect of internal pollution resulting from the presence of multiple stellar populations. To better constrain this scenario, we investigate the abundance distribution of the heavy element rubidium (Rb) in NGC 6752, NGC 1904, and NGC 104 (47 Tuc). Combining the results from our sample with those in the literature, we found that Rb exhibits no star-to-star variations, regardless of cluster metallicity, with the possible intriguing, although very uncertain, exception of the metal-rich bulge cluster NGC 6388. If no star-to-star variations can be confirmed for all GCs, this finding implies that the stellar source of the proton-capture element variations must not have produced significant amounts of Rb. This element is observed to be enhanced at extremely high levels in intermediate-mass asymptotic giant branch (IM-AGB) stars in the Magellanic Clouds (i.e., at a metallicity similar to 47 Tuc and NGC 6388). This fact may present a challenge to this popular candidate polluter, unless the mass range of the observed IM-AGB stars does not participate in the formation of the second-generation stars in GCs. A number of possible solutions are available to resolve this conundrum, including the fact that the Magellanic Cloud observations are very uncertain and may need to be revised. The fast rotating massive stars scenario would not face this potential problem as the slow mechanical winds of these stars during their main-sequence phase do not carry any Rb enhancements; however, these candidates face even bigger issues such as the production of Li and the close overlap with core-collapse supernova timescales. Observations of Sr, Rb, and Zr in metal-rich clusters such as NGC 6388 and NGC 6441 are sorely needed to clarify the situation.

  12. Ultracold Mixtures of Rubidium and Ytterbium for Open Quantum System Engineering

    NASA Astrophysics Data System (ADS)

    Herold, Creston David

    Exquisite experimental control of quantum systems has led to sharp growth of basic quantum research in recent years. Controlling dissipation has been crucial in producing ultracold, trapped atomic samples. Recent theoretical work has suggested dissipation can be a useful tool for quantum state preparation. Controlling not only how a system interacts with a reservoir, but the ability to engineer the reservoir itself would be a powerful platform for open quantum system research. Toward this end, we have constructed an apparatus to study ultracold mixtures of rubidium (Rb) and ytterbium (Yb). We have developed a Rb-blind optical lattice at 423.018(7) nm, which will enable us to immerse a lattice of Yb atoms (the system) into a Rb BEC (superfluid reservoir). We have produced Bose-Einstein condensates of 170Yb and 174Yb, two of the five bosonic isotopes of Yb, which also has two fermionic isotopes. Flexible optical trapping of Rb and Yb was achieved with a two-color dipole trap of 532 and 1064 nm, and we observed thermalization in ultracold mixtures of Rb and Yb. Using the Rb-blind optical lattice, we measured very small light shifts of 87Rb BECs near the light shift zero-wavelengths adjacent the 6p electronic states, through a coherent series of lattice pulses. The positions of the zero-wavelengths are sensitive to the electric dipole matrix elements between the 5s and 6p states, and we made the first experimental measurement of their strength. By measuring a light shift, we were not sensitive to excited state branching ratios, and we achieved a precision better than 0.3%.

  13. Measurement of the photoionization cross section of the 5S{sub 1/2} state of rubidium

    SciTech Connect

    Lowell, J.R.; Northup, T.; Patterson, B.M.; Takekoshi, T.; Knize, R.J.

    2002-12-01

    We report the measurement of the photoionization cross section for the 5S{sub 1/2} state of rubidium, using atoms confined in a magneto-optical trap. A single-photon rate at {lambda}=266 nm was found by monitoring the decay of trap fluorescence after exposure to ionizing radiation from a quadrupled Nd:YVO{sub 4} laser. In order to eliminate excited-state ionization, the photoionization and trapping lasers were alternately chopped, so that only ground-state atoms were ionized. We determine that the photoionization cross section at {lambda}=266 nm is {sigma}=1.7(2)x10{sup -20} cm{sup 2}.

  14. Performance of the new Efratom optically pumped rubidium frequency standards and their possible application in space relativity experiments

    NASA Technical Reports Server (NTRS)

    Alley, C. O.; Williams, R.; Singh, G.; Mullendore, J.

    1972-01-01

    The characteristics of Efratom optically pumped rubidium frequency standards are discussed. The Efratom units were compared with cesium beam and hydrogen maser standards and showed a stability of approximately 5 times 10 to the minus 12th power over two one-week periods. Dependency of frequency upon the environmental parameters of pressure, magnetic field, temperature, supply voltage, and acceleration was measured. A package of three units with automatic phase comparison and recording was designed and constructed to allow a measurement of relativistic effects on time with high accuracy during space missions.

  15. Realization of low frequency and controllable-bandwidth squeezing based on a four-wave-mixing amplifer in rubidium vapor

    SciTech Connect

    Liu, Cunjin; Jing, Jietai; Zhou, Zhifan; Pooser, Raphael C; Hudelist, Florian; Zhang, Weiping

    2011-01-01

    We experimentally demonstrate the creation of two correlated beams generated by a nondegenerate four-wave-mixing amplifier at {lambda} = 795 nm in hot rubidium vapor. We achieve intensity difference squeezing at frequencies as low as 1.5 kHz which is so far the lowest frequency to observe squeezing in an atomic system. The squeezing spans from 5.5 to 16.5 MHz with a maximum squeezing of {approx}5 dB at 1 MHz. We can control the squeezing bandwidth by changing the pump power. Both low frequency and controllable bandwidth squeezing show great potential in sensitivity detection and precise control of the atom optics measurement.

  16. Frequency doubling of 1560nm diode laser via PPLN and PPKTP crystals and frequency stabilization to rubidium absorption line

    NASA Astrophysics Data System (ADS)

    Guo, Shanlong; Yang, Jianfeng; Yang, Baodong; Zhang, Tiancai; Wang, Junmin

    2010-11-01

    In our experiment, a polarization-maintaining (PM) fiber-pigtailed butterfly-sealed 1560nm distributed-feedback (DFB) laser diode is amplified by a 5-Watt EDFA, then a multiple-period PPLN crystal (1mm×10mm×20mm) and a single-period PPKTP crystal (1mm×2mm×30mm) are utilized to perform SHG via single pass configuration. The second harmonic power of ~ 239 mW@780 nm for PPLN and ~ 210 mW@780 nm for PPKTP are obtained with ~5W@1560 nm laser input, corresponding to SHG efficiency of ~ 5.2% for PPLN and ~ 4.4% for PPKTP, respectively. Finally the 1560 nm laser diode's frequency is locked to rubidium absorption line via SHG and rubidium absorption spectroscopy, the laser frequency drift for free-running case is ~ 56 MHz in 30 s, the residual frequency after being locked drift is ~ +/- 3.5 MHz.

  17. Near infrared rubidium 62P3/2,1/2→62S1/2 laser

    NASA Astrophysics Data System (ADS)

    Moran, Paul J.; Richards, Ryan M.; Rice, Christopher A.; Perram, Glen P.

    2016-09-01

    An optically pumped near infrared rubidium (Rb) pulsed, mirrorless laser has been demonstrated in a heat pipe along both the 62P3/2-62S1/2 transition at 2.73 μm and the 62P1/2-62S1/2 transition at 2.79 μm. The bleached limit, slope efficiency, and maximum laser output energy of the near infrared Rb laser scale linearly with increasing Rb density, contrary to prior results. Previously, a maximum output energy of ~5 nJ had been observed before a rollover occurred in the scaling of output energy with rubidium concentration. In this experiment, the maximum laser output energy observed was ~100 nJ, with no indication of any scaling limitation. A maximum slope efficiency of 1.7×10-4 was observed. A small percentage of the pump photons were absorbed even at the maximum Rb density attainable in the heat pipe, indicating that laser efficiency could be scaled to near the quantum efficiency. Additionally, the hyperfine structure and absorption spectral profile of the 52S1/2-62P1/2 and 52S1/2-62P3/2 (blue) pump transitions were studied using a cw pump source.

  18. Dihydroxy bile salt-induced secretion of rubidium ion across the rabbit distal colon

    SciTech Connect

    Freel, R.W.

    1987-04-01

    Possible mechanisms of dihydroxy bile salt-induced K/sup +/ secretion by the mammalian colon were evaluated by studying the effects of taurochenodeoxycholate (TCDC) on /sup 86/Rb/sup +/ transport across the isolated, short-circuited rabbit distal colon. Simultaneous measurements of /sup 86/Rb/sup +/ and /sup 42/K/sup +/ unidirectional fluxes were highly correlated, indicating that Rb/sup +/ is a suitable tracer for K/sup +/ transport across the colon. Furthermore, mucosal Ba/sup 2 +/ (4 mM) or serosal ouabain (0.1 mM) decreased serosal to mucosal rubidium flux (J/sub s ..-->.. m//sup Rb/) without affecting J/sub m ..-->.. s//sup Rb/. Dibutyryl cyclic adenosine monophosphate (dBcAMP, 0.5 mM serosal) specifically increased J/sub s ..-->.. m//sup Rb of controls through a barium- (4 mM, mucosal) sensitive pathway without affecting J/sub s ..-->.. m//Rb/. Mucosal addition of 2 mM TCDC increased tissue conductance (G/sub T/), reduced short-circuit (I/sub sc/) slightly, and reversed J/sub net//sup Rb/ principally by increasing J/sub s ..-->.. m//sup Rb/. The TCDC-induced increases in J/sub s ..-->.. m//sup Rb/ were reduced by 0.1 mM serosal ouabain or 4 mM mucosal Ba/sup 2 +/. Pretreatment with the putative calcium-calmodulin antagonist trifluoperazine blocked dBcAMP- and TCDC-induced increases in J/sub s ..-->.. m//sup Rb/ but did not prevent changes in G/sub T/ or I/sub sc/ produced by either secretagogue. It is concluded that TCDC stimulates Rb/sup +/ or K/sup +/ secretion by primarily increasing the efflux of these ions across Ba/sup 2 +/-sensitive K/sup +/ channels in the apical membrane and that this increase in permeability may be mediated intracellularly by the calcium-calmodulin complex.

  19. Coherent optical transients observed in rubidium atomic line filtered Doppler velocimetry experiments

    NASA Astrophysics Data System (ADS)

    Fajardo, Mario E.; Molek, Christopher D.; Vesely, Annamaria L.

    2015-10-01

    We report the first successful results from our novel Rubidium Atomic Line Filtered (RALF) Doppler velocimetry apparatus, along with unanticipated oscillatory signals due to coherent optical transients generated within pure Rb vapor cells. RALF is a high-velocity and high-acceleration extension of the well-known Doppler Global Velocimetry (DGV) technique for constructing multi-dimensional flow velocity vector maps in aerodynamics experiments [H. Komine, U.S. Patent No. 4,919,536 (24 April 1990)]. RALF exploits the frequency dependence of pressure-broadened Rb atom optical absorptions in a heated Rb/N2 gas cell to encode the Doppler shift of reflected near-resonant (λ0 ≈ 780.24 nm) laser light onto the intensity transmitted by the cell. The present RALF apparatus combines fiber optic and free-space components and was built to determine suitable operating conditions and performance parameters for the Rb/N2 gas cells. It yields single-spot velocities of thin laser-driven-flyer test surfaces and incorporates a simultaneous Photonic Doppler Velocimetry (PDV) channel [Strand et al., Rev. Sci. Instrum. 77, 083108 (2006)] for validation of the RALF results, which we demonstrate here over the v = 0 to 1 km/s range. Both RALF and DGV presume the vapor cells to be simple Beer's Law optical absorbers, so we were quite surprised to observe oscillatory signals in experiments employing low pressure pure Rb vapor cells. We interpret these oscillations as interference between the Doppler shifted reflected light and the Free Induction Decay (FID) coherent optical transient produced within the pure Rb cells at the original laser frequency; this is confirmed by direct comparison of the PDV and FID signals. We attribute the different behaviors of the Rb/N2 vs. Rb gas cells to efficient dephasing of the atomic/optical coherences by Rb-N2 collisions. The minimum necessary N2 buffer gas density ≈0.3 amagat translates into a smallest useful velocity range of 0 to 2 km/s, which can

  20. Coherent optical transients observed in rubidium atomic line filtered Doppler velocimetry experiments

    SciTech Connect

    Fajardo, Mario E. Molek, Christopher D.; Vesely, Annamaria L.

    2015-10-14

    We report the first successful results from our novel Rubidium Atomic Line Filtered (RALF) Doppler velocimetry apparatus, along with unanticipated oscillatory signals due to coherent optical transients generated within pure Rb vapor cells. RALF is a high-velocity and high-acceleration extension of the well-known Doppler Global Velocimetry (DGV) technique for constructing multi-dimensional flow velocity vector maps in aerodynamics experiments [H. Komine, U.S. Patent No. 4,919,536 (24 April 1990)]. RALF exploits the frequency dependence of pressure-broadened Rb atom optical absorptions in a heated Rb/N{sub 2} gas cell to encode the Doppler shift of reflected near-resonant (λ{sub 0} ≈ 780.24 nm) laser light onto the intensity transmitted by the cell. The present RALF apparatus combines fiber optic and free-space components and was built to determine suitable operating conditions and performance parameters for the Rb/N{sub 2} gas cells. It yields single-spot velocities of thin laser-driven-flyer test surfaces and incorporates a simultaneous Photonic Doppler Velocimetry (PDV) channel [Strand et al., Rev. Sci. Instrum. 77, 083108 (2006)] for validation of the RALF results, which we demonstrate here over the v = 0 to 1 km/s range. Both RALF and DGV presume the vapor cells to be simple Beer's Law optical absorbers, so we were quite surprised to observe oscillatory signals in experiments employing low pressure pure Rb vapor cells. We interpret these oscillations as interference between the Doppler shifted reflected light and the Free Induction Decay (FID) coherent optical transient produced within the pure Rb cells at the original laser frequency; this is confirmed by direct comparison of the PDV and FID signals. We attribute the different behaviors of the Rb/N{sub 2} vs. Rb gas cells to efficient dephasing of the atomic/optical coherences by Rb-N{sub 2} collisions. The minimum necessary N{sub 2} buffer gas density ≈0.3 amagat translates into a smallest

  1. Crystal structure and superconductivity of rubidium tungsten bronzes Rb{sub x}WO{sub 3} prepared by a hybrid microwave method

    SciTech Connect

    Guo Juan Dong Cheng; Yang Lihong; Chen Hong

    2008-04-01

    The rubidium tungsten bronzes Rb{sub x}WO{sub 3} have been prepared from Rb{sub 2}CO{sub 3}, WO{sub 3} and W powders using hybrid microwave method. The single hexagonal phase samples can be obtained as actual rubidium content x in the range of 0.21-0.33, and their lattice parameters a and c linearly drop and rise with the increase of rubidium content respectively. For samples with x = 0.14, 0.16, 0.18, the superconducting transition temperature T{sub c} from resistivity measurements does not change with the rubidium content, while T{sub c} from susceptibility measurements shows a decrease from 5.3 K for x = 0.14 to 4.8 K for x = 0.18. The charge density wave (CDW) transition appears in Rb{sub 0.21}WO{sub 3}, Rb{sub 0.23}WO{sub 3} and Rb{sub 0.25}WO{sub 3} at about 200-260 K. The CDW transition is most obvious in Rb{sub 0.23}WO{sub 3} which shows the lowest degree of crystallization among the samples.

  2. Voloshinite, a new rubidium mica from granitic pegmatite of Voron'i Tundras, Kola Peninsula, Russia

    NASA Astrophysics Data System (ADS)

    Pekov, I. V.; Kononkova, N. N.; Agakhanov, A. A.; Belakovsky, D. I.; Kazantsev, S. S.; Zubkova, N. V.

    2010-12-01

    Voloshinite, a new mineral of the mica group, a rubidium analogue of lepidolite, has been found from the rare-element granitic pegmatite at Mt. Vasin-Myl'k, Voron'i Tundras, Kola Peninsula, Russia. It is closely associated with pollucite and lepidolite and commonly with muscovite, albite, and quartz; K,Rb-feldspar, rubicline, spodumene, montebrasite, and elbaite are among associated minerals as well. Voloshinite, a late mineral that formed after pollucite, commonly fills polymineralic veinlets and pods within the pollucite aggregates. It occurs as rims up to 0.05 mm thick around lepidolite, as intergrowths of tabular crystals up to 0.25 mm in size, and occasionally replaces lepidolite. The new mineral is colorless, transparent, with vitreous luster. Cleavage is eminent parallel to {001}; flakes are flexible. The calculated density is 2.95 g/cm3. The new mineral is biaxial (-), with 2 V = 25°, α calc = 1.511, β = 1.586, and γ = 1.590. The optical orientation is Y = b, Z = a. The chemical composition of the type material determined by electron microprobe (average of five point analyses; Li has been determined with ICP-OES) is as follows (wt %): 0.03 Na2O, 3.70 K2O, 12.18 Rb2O, 2.02 Cs2O, 4.0 Li2O, 0.03 CaO, 0.02 MgO, 0.14 MnO, 21.33 Al2O3, 53.14 SiO2, 6.41 F, -O = F2 2.70, total is 100.30. The empirical formula is: (Rb0.54K0.33Cs0.06)Σ0.93(Al1.42Li1.11Mn0.01)Σ2.54(Si3.68Al0.32)Σ4O10 (F1.40(OH)0.60)Σ2. The idealized formula is as follows: Rb(LiAl1.5□0.5)[Al0.5Si3.5O10]F2. Voloshinite forms a continuous solid solution with lepidolite. According to X-ray single crystal study, voloshinite is monoclinic, space group C2/ c. The unit-cell dimensions are: a = 5.191, b = 9.025, c = 20.40 Å, β = 95.37°, V= 951.5 Å3, Z = 4. Polytype is 2 M 1. The strongest reflections in the X-ray powder diffraction pattern ( d, Å- I[ hkl]) are: 10.1-60[001]; 4.55-80[020, 110, 11 bar 1 ]; 3.49-50[11 bar 4 ]; 3.35-60[024, 006]; 3.02-45[025]; 2.575-100[11 bar 6 , 131, 20 bar 2 , 13

  3. Alkali-support interactions on rubidium base catalysts determined by XANES, EXAFS, CO{sub 2} adsorption, and IR spectroscopy

    SciTech Connect

    Doskocil, E.J.; Bordawekar, S.V.; Davis, R.J.

    1997-07-01

    Rubidium was supported on a variety of catalyst supports, including magnesia, titania, alumina, carbon, and silica. Except for Rb/MgO, none of the oxide-based samples contained surface carbonates as detected by IR spectroscopy after pretreatment at 773 K. The XANES and EXAFS associated with the Rb K edge indicated that the local structure around Rb was highly dependent on the support composition. Results from CO{sub 2} stepwise TPD showed that Rb/MgO possessed strongly basic sites that were not present on pure MgO. The basic sites formed by Rb addition to the other supports were weaker than those on Rb/MgO. Decomposition of 2-propanol at 593 K was used to relate catalytic activity to surface basicity. 40 refs., 16 figs., 4 tabs.

  4. Potassium, Rubidium, Strontium, Thorium, Uranium, and the Ratio of Strontium-87 to Strontium-86 in Oceanic Tholeiitic Basalt.

    PubMed

    Tatsumoto, M; Hedge, C E; Engel, A E

    1965-11-12

    The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr(87) to Sr(86) is about 0.702, that of K to U is 1.4 x 10(4), and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr(87) are less than in other common igneous rocks. The ratios of Th to U and Sr(87) to Sr(86) suggest that the source region of the oceanic tholeiites was differentiated from the original mantle material some time in the geologic past.

  5. Structure determination, electronic and optical properties of rubidium holmium polyphosphate RbHo(PO3)4

    NASA Astrophysics Data System (ADS)

    Zhu, Jing; Chen, Hui; Wang, Yude; Guan, Hongtao; Xiao, Xuechun

    2012-12-01

    Structural, optical, and electronic properties of a new alkali metal-rare earth polyphosphate, RbHo(PO3)4, have been investigated by means of single-crystal X-ray diffraction, power X-ray diffraction, elemental analysis, and spectral measurement. RbHo(PO3)4 crystallizes in the monoclinic with space group P21/n and Z = 4. It is described as a three-dimensional (3D) architecture built up of PO4 double spiral chains and HoO8 polyhedra by corner-sharing. The 11-coordinated rubidium atoms are located in infinite tunnels. Additionally, in order to gain further insight into the relationship between property and structure of RbHo(PO3)4, theoretical calculation based on the density functional theory (DFT) was performed using the total-energy code CASTEP.

  6. Potassium, rubidium, strontium, thorium, uranium, and the ratio of strontium-87 to strontium-86 in oceanic tholeiitic basalt

    USGS Publications Warehouse

    Tatsumoto, M.; Hedge, C.E.; Engel, A.E.J.

    1965-01-01

    The average concentrations of potassium, rubidium, strontium, thorium, and uranium in oceanic tholeiitic basalt are (in parts per million) K, 1400; Rb, 1.2; Sr, 120; Th, 0.2; and U, 0.1. The ratio Sr87 to Sr86 is about 0.702, that of K to U is 1.4 ?? 104, and of Th to U is 1.8. These amounts of K, Th, U, and radiogenic Sr87 are less than in other common igneous rocks. The ratios of Th to U and Sr87 to Sr 86 suggest that the source region of the oceanic tholeiites was differentiated from the original mantle material some time in the geologic past.

  7. Amplified spontaneous emission measurement of a line-narrowed, tunable, Ti:Al2O3 amplifier using rubidium absorption

    NASA Technical Reports Server (NTRS)

    Barnes, James C.; Barnes, Norman P.; Lockard, George E.; Cross, Patricia L.

    1989-01-01

    Amplified spontaneous emission, ASE, generated by a Ti:Al2O3 laser amplifier has been measured as a function of pump energy, and thus gain, using the atomic absorption of rubidium, Rb, gas at 0.780 micron. By tuning the Ti:Al2O3 laser, the Rb cell could selectively absorb the narrow spectral bandwidth laser radiation while transmitting the wide spectral bandwidth ASE. Transmission of laser amplifier pulses through a Rb absorption cell, measured at various temperatures, thus allows the measurement of the weak ASE in the vicinity of the strong laser pulse. A model for the transmission of Rb as a function of temperature and wavelength has been developed. The measured transmissions are in good agreement with the transmission model predictions.

  8. Effect of buffer gas on an electromagnetically induced transparency in a ladder system using thermal rubidium vapor

    SciTech Connect

    Sargsyan, Armen; Sarkisyan, David; Krohn, Ulrich; Keaveney, James; Adams, Charles

    2010-10-15

    We report on the observation of electromagnetically induced transparency in a ladder system in the presence of a buffer gas. In particular, we study the 5S{sub 1/2}-5P{sub 3/2}-5D{sub 5/2} transition in thermal rubidium vapor with a neon buffer gas at a pressure of 6 Torr. In contrast to the line-narrowing effect of buffer gas on {Lambda} systems, we show that the presence of the buffer gas leads to an additional broadening of (34{+-}5) MHz, which suggests a cross section for Rb(5D{sub 5/2})-Ne of {sigma}{sub k}{sup (D)}=(23{+-}4)x10{sup -19} m{sup 2}. However, in the limit where the coupling Rabi frequency is larger than the collisional dephasing, a strong transparency feature can still be observed.

  9. Multi-V-type and Λ-type electromagnetically induced transparency experiments in rubidium atoms with low-power low-cost free running single mode diode lasers

    NASA Astrophysics Data System (ADS)

    Lavín Varela, S.; León Suazo, J. A.; Gutierrez González, J.; Vargas Roco, J.; Buberl, T.; Aguirre Gómez, J. G.

    2016-05-01

    In this work we present the experimental realization of electromagnetically induced transparency (EIT) in A-type and multi-V-type configurations in a sample of rubidium atoms inside a vapor cell at room temperature. Typical EIT windows are clearly visible in the Doppler- broadened absorption signal of the weak probe beam. The coherent optical pump and probe fields are produced by two tunable low-cost, low-power, continuous-wave (cw), free-running and single mode operated diode laser systems, temperature stabilized and current controlled, tuned to the D2 line of rubidium atoms at 780.2 nm wavelength. The continuum wave and single mode operation of our laser systems are confirmed by direct and saturated absorption spectroscopy techniques. Among other applications, these simple experiments can be used as a low-cost undergraduate laboratory in atomic physics, laser physics, coherent light-atom interaction, and high resolution atomic spectroscopy.

  10. Rubidium 2,4,6-trioxo-1,3-diazinan-5-ide-1,3-diazinane-2,4,6-trione-water (1/1/1).

    PubMed

    Gryl, Marlena; Stadnicka, Katarzyna

    2011-05-01

    The asymmetric unit of the title compound, Rb(+)·C(4)H(3)N(2)O(3) (-)·C(4)H(4)N(2)O(3)·H(2)O, consists of one rubidium cation, a barbituric acid mol-ecule, a barbiturate anion and one water mol-ecule. The rubidium ion has seven close-contact inter-actions with O atoms, with Rb⋯O distances ranging from 2.8594 (16) to 3.2641 (14) Å. These seven O atoms together with an eighth O atom at 3.492 (2) Å away from Rb form a distorted polyhedron with shape inter-mediate between an anti-prism and a dodeca-hedron. The Rb(+) ions connect layers built of organic components and water mol-ecules linked via N-H⋯O and O-H⋯O hydrogen bonds. PMID:21754300

  11. Molecular dynamics simulation of the structure and thermodynamic properties of liquid rubidium at pressures of up to 10 GPa and temperatures of up to 3500 K

    NASA Astrophysics Data System (ADS)

    Belashchenko, D. K.

    2016-09-01

    The models of rubidium at temperatures of up to 3500 K, degrees of compression of up to Y = V/ V 0 = 0.3, and pressures of up to 32 GPa were constructed by molecular dynamics (MD) using the interparticle potential EAM. The thermodynamic properties of the MD models agree satisfactorily with experiment in the range of parameters under study at rubidium densities higher than 0.86 g/cm3. The behavior of the models in the range of the van der Waals loop was analyzed; the calculated critical temperature of rubidium T c is ˜2250 ± 25 K, density ˜0.41 g/cm3, pressure ˜0.019 GPa, and compressibility factor Z = pV/ RT ≈ 0.137. The states with the unity factor Z = 1 were observed at pressures of up to 0.30 GPa (at ˜3000 K); the temperature dependence of the density of the models with Z = 1 is nearly linear, and the Boyle temperature is T B ≈ 10160 K. The ratio T c/ T B = 0.221 is close to this value for cesium (0.23) and mercury (0.276). In the temperature and pressure ranges under study, the inversion of the Joule-Thomson coefficient did not take place, but should be observed at pressures of ⩽0.3 GPa and elevated temperatures. It was found that the diffusion coefficient D( T) dependences do not straighten in the usually used coordinates within wide temperature ranges. It was concluded that the structure of the liquid smoothly changes when the rubidium models are compressed and this reveals in the change of the degree of asymmetry of the first peak of the radial distribution function.

  12. On-orbit frequency stability analysis of the GPS NAVSTAR 8 rubidium clock and NAVSTARS 9 and 10 cesium clocks. Memorandum report, January-December 1985

    SciTech Connect

    Buisson, J.A.; Largay, M.M.

    1987-09-17

    This report describes the on-orbit frequency stability performance analysis of the Global Positioning System (GPS) NAVSTAR 8 rubidium clock and the NAVSTARs 9 and 10 cesium clocks. Time-domain measurements, taken from three GPS monitor sites and from the United States Naval Observatory (USNO), were analyzed to determine the short and long-term frequency-stability performance of the NAVSTAR clocks. The data presented include measurements from 1985.

  13. On-orbit frequency stability analysis of the GPS NAVSTAR-1 quartz clock and the NAVSTARs-6 and -8 rubidium clocks

    NASA Technical Reports Server (NTRS)

    Mccaskill, T. B.; Buisson, J. A.; Reid, W. G.

    1984-01-01

    An on-orbit frequency stability performance analysis of the GPS NAVSTAR-1 quartz clock and the NAVSTARs-6 and -8 rubidium clocks is presented. The clock offsets were obtained from measurements taken at the GPS monitor stations which use high performance cesium standards as a reference. Clock performance is characterized through the use of the Allan variance, which is evaluated for sample times of 15 minutes to two hours, and from one day to 10 days. The quartz and rubidium clocks' offsets were corrected for aging rate before computing the frequency stability. The effect of small errors in aging rate is presented for the NAVSTAR-8 rubidium clock's stability analysis. The analysis includes presentation of time and frequency residuals with respect to linear and quadratic models, which aid in obtaining aging rate values and identifying systematic and random effects. The frequency stability values were further processed with a time domain noise process analysis, which is used to classify random noise process and modulation type.

  14. Robust and Efficient Population Transfer in Ultracold Rubidium Using A Single Linearly Chirped Laser Pulse With a Novel Pulse Envelope

    NASA Astrophysics Data System (ADS)

    Collins, Thomas; Malinovskaya, Svetlana

    2012-06-01

    The ability to manipulate the state of a quantum system is the at very heart of the field of quantum control. As quantum control is an essential aspect of the emerging field of quantum computing, it is necessary to find techniques for manipulating quantum systems that are both robust and efficient to implement industrially. In this work the population dynamics of the valence electron of Rubidium, interacting with a single linearly chirped laser pulse, are studied. The pulse envelope is constructed from overlapping Gaussian waveforms and is described analytically by the formula: E0∑β=-n^nExp-[t-(T-n*ɛ)]^22τ0^2 with the parameter ɛ being the separation in time between each peak with the oscillating electric field is phase locked to the central peak. The response of the quantum yield obtained at the end of the pulse to changes in the parameters of the oscillating electric field and pulse envelope are studied. For certain values of these parameters, achievement of a transfer of over 99% of the population to a desired quantum state within the hyperfine structure of the 5S shell via adiabatic passage using beam intensities which are on the order of 100W/cm^2 is demonstrated. Results are robust in the adiabatic regime.

  15. Microwave spectroscopy of the cold rubidium (n +1 ) d5 /2→n g and n h transitions

    NASA Astrophysics Data System (ADS)

    Lee, Jeonghun; Nunkaew, J.; Gallagher, T. F.

    2016-08-01

    We present an experimental technique that allows us to determine the zero-field intervals between high-ℓ states of Rb in a magneto-optical trap, in spite of the fact that we can only control the stray electric field in one direction. The technique is based on measuring a property of the atom that depends on the field, as opposed to its square. This approach allows the determination of the zero-field intervals and the magnitude of the stray field in the uncontrolled perpendicular direction. We use this technique to observe the microwave transitions of rubidium from the (n +1 ) d5 /2 states to the n g and n h states of 27 ≤n ≤30 . From the observed microwave transitions, we determine the quantum defects of the n g and n h states. Using the quantum defects of the n g and n h states and the adiabatic core polarization theory, we determine the Rb+ ionic dipole and quadrupole polarizabilities to be αd=9.12 (2 ) a03 and αq=14 (3 ) a05 , respectively.

  16. Progress toward a search for anomalous spin-mass couplings with a dual-isotope rubidium magnetometer

    NASA Astrophysics Data System (ADS)

    Valdez, Julian; Lacey, Ian; Peregrinaramirez, Rodrigo; Jackson Kimball, Derek

    2011-05-01

    We report progress in our development of a dual-isotope rubidium magnetometer to be used to search for a long-range coupling between proton spins and the mass of the Earth. The valence electron dominates magnetic interactions and serves as a precise co-magnetometer for the nuclei in a simultaneous measurement of Rb-85 and Rb-87 spin precession frequencies, enabling accurate subtraction of magnetic perturbations. Both Rb nuclei have valence protons, but in Rb-87 the proton spin is parallel to the nuclear spin and magnetic moment while for Rb-85 the proton spin is anti-parallel to the nuclear spin and magnetic moment. Thus anomalous interactions of the proton spin produce a differential shift between the Rb spin-precession frequencies, whereas many sources of systematic error produce common-mode shifts of the spin-precession frequencies which can be controlled through auxiliary measurements. We discuss significant enhancement of the sensitivity through the use of new alkene-based antirelaxation coatings, and methods to control systematic effects due to light shifts, collisions, and the gyro-compass effect. This work is supported by the National Science Foundation under grant PHY-0969666.

  17. Testing the universality of free fall with rubidium and ytterbium in a very large baseline atom interferometer

    NASA Astrophysics Data System (ADS)

    Hartwig, J.; Abend, S.; Schubert, C.; Schlippert, D.; Ahlers, H.; Posso-Trujillo, K.; Gaaloul, N.; Ertmer, W.; Rasel, E. M.

    2015-03-01

    We propose a very long baseline atom interferometer test of Einstein’s equivalence principle (EEP) with ytterbium and rubidium extending over 10 m of free fall. In view of existing parametrizations of EEP violations, this choice of test masses significantly broadens the scope of atom interferometric EEP tests with respect to other performed or proposed tests by comparing two elements with high atomic numbfers. In the first step, our experimental scheme will allow us to reach an accuracy in the Eötvös ratio of 7 · 10-13. This achievement will constrain violation scenarios beyond our present knowledge and will represent an important milestone for exploring a variety of schemes for further improvements of the tests as outlined in the paper. We will discuss the technical realisation in the new infrastructure of the Hanover Institute of Technology (HITec) and give a short overview of the requirements needed to reach this accuracy. The experiment will demonstrate a variety of techniques, which will be employed in future tests of EEP, high-accuracy gravimetry and gravity gradiometry. It includes operation of a force-sensitive atom interferometer with an alkaline earth-like element in free fall, beam splitting over macroscopic distances and novel source concepts.

  18. Effect of photoions on the line shape of the Foerster resonance lines and microwave transitions in cold rubidium Rydberg atoms

    SciTech Connect

    Tretyakov, D. B.; Beterov, I. I.; Entin, V. M.; Yakshina, E. A.; Ryabtsev, I. I.; Dyubko, S. F.; Alekseev, E. A.; Pogrebnyak, N. L.; Bezuglov, N. N.; Arimondo, E.

    2012-01-15

    Experiments are carried out on the spectroscopy of the Foerster resonance lines Rb(37P) + Rb(37P) {yields} Rb(37S) + Rb(38S) and microwave transitions nP {yields} n Prime S, n Prime D between Rydberg states of cold rubidium atoms in a magneto-optical trap (MOT). Under ordinary conditions, all spectra exhibit a linewidth of 2-3 MHz irrespective of the interaction time between atoms or between atoms and microwave radiation, although the limit resonance width should be determined by the inverse interaction time. The analysis of experimental conditions has shown that the main source of line broadening is the inhomogeneous electric field of cold photoions that are generated under the excitation of initial nP Rydberg states by broadband pulsed laser radiation. The application of an additional electric-field pulse that rapidly extracts photoions produced by a laser pulse leads to a considerable narrowing of lines of microwave resonances and the Foerster resonance. Various sources of line broadening in cold Rydberg atoms are analyzed.

  19. Absorption spectroscopy of the rubidium dimer in an overheated vapor: An accurate check of molecular structure and dynamics

    SciTech Connect

    Beuc, R.; Movre, M.; Horvatic, V.; Vadla, C.; Dulieu, O.; Aymar, M.

    2007-03-15

    Experimental studies of the absorption spectrum of the Rb{sub 2} dimer are performed in the 600-1100 nm wavelength range for temperatures between 615 and 745 K. The reduced absorption coefficient is measured by spatially resolved white light absorption in overheated rubidium vapor with a radial temperature gradient, which enables simultaneous measurements at different temperatures. Semiclassical and quantum spectral simulations are obtained by taking into account all possible transitions involving the potential curves stemming from the 5 {sup 2}S+5 {sup 2}S and 5 {sup 2}S+5 {sup 2}P asymptotes. The most accurate experimental potential curves are used where available, and newly calculated potential curves and transition dipole moments otherwise. The overall consistency of the theoretical model with the experimental interpretation is obtained only if the radial dependence of both the calculated transition dipole moments and the spin-orbit coupling is taken into account. This highlights the low-resolution absorption spectroscopy as a valuable tool for checking the accuracy of molecular electronic structure calculations.

  20. Planar positron imaging of rubidium-82 for myocardial infarction: A comparison with thallium-201 and regional wall motion

    SciTech Connect

    Williams, K.A.; Ryan, J.W.; Resnekov, L.; Stark, V.; Peterson, E.L.; Gustafson, G.C.; Martin, W.B.; Freier, P.A.; Harper, P.V. )

    1989-09-01

    Rubidium-82 (Rb-82) is a generator-produced, short half-life (76 seconds) positron emitting potassium analog. Using a mobile gamma camera equipped with a rotating tungsten collimator and high-energy shielding, we examined the use of Rb-82 in the coronary care unit and clinical laboratory for detection of perfusion defects due to myocardial infarction. We studied 31 subjects, 10 patients with acute myocardial infarction, 12 with remote myocardial infarction, and nine controls. Rb-82 images were compared with Tl-201 and regional wall motion for detection of infarct-related arteries. Of the 22 patients with myocardial infarction, 16 were identified with Rb-82 and Tl-201. In nine control subjects, eight were normal with each method. Correlation between Rb-82 and Tl-201 defect scores was excellent. Sensitivity and specificity for infarct-related arteries were similar for Rb-82, Tl-201, and wall motion imaging. Thus planar Rb-82 imaging can detect MI reliably in the coronary care unit and in the clinical laboratory.

  1. Vibrational quantum defect for the analysis of weakly bound molecules. Application to Rubidium and cesium data.

    NASA Astrophysics Data System (ADS)

    Pruvost, L.; Jelassi, H.; Viaris de Lesegno, B.

    2009-05-01

    In the context of cold molecules physics, the spectroscopic data and their analysis play a very important role. The photoassociation spectroscopy of alkali dimmers, performed by laser excitation of cold atoms, is one of the methods providing high-resolution data about the vibrational levels lying close to the dissociation limit. Such weakly bound molecules are described by the dipole-dipole interaction, i.e. -1/R^3 where R is the inter-nuclear distance and their eigen energies are close to the Le Roy-Bernstein formula [1]. The discrepancies to the formula law are due to the short-range interactions of the potential and to couplings between potentials. We have expressed the discrepancies via a parameter, the vibrational quantum defect (VQD), defined similar to the atomic quantum defect [2]. The VQD deduced from the data and plotted versus the energy allows us to emphasize the couplings. Furthermore, a fit of the graph using a 2-channel model provides the value of the coupling and a characterization of the 2 potentials. We have applied the method 5s1/2-5p1/20u+ data of Rb2 recorded in our group [3] and 6s1/2-6p1/20u+ data of Cs2 recorded in Stwalley group [4]. The coupling due to spin-orbit interaction has been deduced, the perturbing levels identified and the wavefunction mixing deduced. [1] R. J. Le Roy , R. B. Bernstein, J. Chem. Phys. 52, 3869, 1970. [2] H. Jelassi et al., Phys. Rev. A. 73, 32501, 2006. [3] H. Jelassi et al., Phys. Rev. A. 74, 12510, 2006. [4] H. Jelassi, et al., Phys. Rev. A 78, 022503, 2008.

  2. Experimental investigations of the kinetic processes involved in a rubidium (Rb) Optically Pumped Alkali metal vapor Laser (OPAL)

    NASA Astrophysics Data System (ADS)

    Zameroski, Nathan D.

    absorption line is used to model the system and interpret experimental data. The experimental data and the laser modeling results are in qualitative agreement for a range of experimental conditions (rubidium number density ˜ 0.84x1013 cm -3 to 2.1x1014 cm-3, methane concentration ˜ 3.3x1018 cm-3 to 1.6x1019 cm -3 and pump intensities up to 120 kW/cm2). The temporal and bleaching (saturation) dynamics of the laser pulse and M 2 properties of the 795 nm laser beam are investigated. A hydrocarbon-free Rb-D2 (rubidium-deuterium) OPAL is demonstrated for the first time.

  3. Comparison of rubidium-82 positron emission tomography and thallium-201 SPECT imaging for detection of coronary artery disease

    SciTech Connect

    Stewart, R.E.; Schwaiger, M.; Molina, E.; Popma, J.; Gacioch, G.M.; Kalus, M.; Squicciarini, S.; al-Aouar, Z.R.; Schork, A.; Kuhl, D.E. )

    1991-06-15

    The diagnostic performance of rubidium-82 (Rb-82) positron emission tomography (PET) and thallium-201 (Tl-201) single-photon emission-computed tomography (SPECT) for detecting coronary artery disease was investigated in 81 patients (52 men, 29 women). PET studies using 60 mCi of Rb-82 were performed at baseline and after intravenous infusion of 0.56 mg/kg dipyridamole in conjunction with handgrip stress. Tl-201 SPECT was performed after dipyridamole-handgrip stress and, in a subset of patients, after treadmill exercise. Sensitivity, specificity and overall diagnostic accuracy were assessed using both visually and quantitatively interpreted coronary angiograms. The overall sensitivity, specificity and accuracy of PET for detection of coronary artery disease (greater than 50% diameter stenosis) were 84, 88 and 85%, respectively. In comparison, the performance of SPECT revealed a sensitivity of 84%, specificity of 53% (p less than 0.05 vs PET) and accuracy of 79%. Similar results were obtained using either visual or quantitative angiographic criteria for severity of coronary artery disease. In 43 patients without prior myocardial infarction, the sensitivity for detection of disease was 71 and 73%, respectively, similar for both PET and SPECT. There was no significant difference in diagnostic performance between imaging modalities when 2 different modes of stress (exercise treadmill vs intravenous dipyridamole plus handgrip) were used with SPECT imaging. Thus, Rb-82 PET provides improved specificity compared with Tl-201 SPECT for identifying coronary artery disease, most likely due to the higher photon energy of Rb-82 and attenuation correction provided by PET. However, post-test referral cannot be entirely excluded as a potential explanation for the lower specificity of Tl-201 SPECT.

  4. Measuring frequency changes due to microwave power variations as a function of C-field setting in a rubidium frequency standard

    NASA Technical Reports Server (NTRS)

    Sarosy, E. B.; Johnson, Walter A.; Karuza, Sarunas K.; Voit, Frank J.

    1992-01-01

    It has been shown in previous studies that in some cesium frequency standards there exist certain C-field settings that minimize frequency changes that are due to variations in the microwave power. In order to determine whether similar results could be obtained with rubidium (Rb) frequency standards (clocks), we performed a similar study, using a completely automated measurement system, on a commercial Rb standard. From our measurements we found that changing the microwave power to the filter cell resulted in significant changes in frequency, and that the magnitude of these frequency changes at low C-field levels went to zero and decreased as the C-field was increased.

  5. Alignment-to-orientation conversion in a magnetic field at nonlinear excitation of the D2 line of rubidium: Experiment and theory

    NASA Astrophysics Data System (ADS)

    Auzinsh, M.; Berzins, A.; Ferber, R.; Gahbauer, F.; Kalvans, L.; Mozers, A.; Spiss, A.

    2015-05-01

    We studied alignment-to-orientation conversion caused by excited-state level crossings in a nonzero magnetic field of both atomic rubidium isotopes. Experimental measurements were performed on the transitions of the D2 line of rubidium. These measured signals were described by a theoretical model that takes into account all neighboring hyperfine transitions, the mixing of magnetic sublevels in an external magnetic field, the coherence properties of the exciting laser radiation, and the Doppler effect. In the experiments, laser-induced fluorescence components were observed at linearly polarized excitation and their difference was taken afterwards. By observing the two oppositely circularly polarized components, we were able to see structures not visible in the difference graphs, which give deeper insight into the processes responsible for these signals. We studied how these signals are dependent on intensity and how they are affected when the exciting laser is tuned to different hyperfine transitions. The comparison between experiment and theory was carried out fulfilling the nonlinear absorption conditions. The theoretical curves described the experimental measurements satisfactorily, reproducing even small features in the shapes of the curves.

  6. Preparation of 5.6dB vacuum squeezing on 795nm rubidium D1 line via an OPO (Conference Presentation)

    NASA Astrophysics Data System (ADS)

    Wang, Junmin; Han, Yashuai; Wen, Xin; Yang, Baodong; Wang, Yanhua; He, Jun

    2016-04-01

    We report on experimental preparation of the second-harmonic-wave laser and the single-mode squeezed vacuum state of 795 nm (rubidium atom D1 line) with periodically-poled KTiOPO4 (PPKTP) bulk crystals. By using a four-mirror bow-tie type ring doubling cavity we achieved ~111 mW of continuous-wave single-frequency ultra-violet (UV) laser radiation at 397.5 nm with ~191 mW of 795 nm fundamental-wave laser input. The corresponding doubling efficiency is 58.1%. To our knowledge, this is the highest doubling efficiency at 795 nm so far. Employing the 397.5 nm UV laser as a pump source of an optical parametric oscillator (OPO) with a PPKTP crystal, we achieved 5.6 dB of 795 nm single-mode squeezed vacuum output at analyzing frequency of 2 MHz. To our knowledge, this is the highest squeezing level of 795 nm single-mode squeezed vacuum so far. We analyzed the pump power dependence of the squeezing level, and concluded that UV laser induced losses of PPKTP crystal are main limiting factors for further improving the squeezing level. The generated 795 nm vacuum squeezing has huge potential applications in quantum memory and ultra-precision measurement with rubidium atoms.

  7. Myocardial metabolism of fluorodeoxyglucose compared to cell membrane integrity for the potassium analogue rubidium-82 for assessing infarct size in man by PET

    SciTech Connect

    Gould, K.L.; Yoshida, K.; Hess, M.J.; Haynie, M.; Mullani, N.; Smalling, R.W. )

    1991-01-01

    Potassium loss from damaged myocardial cells is linearly related to CPK enzyme loss reflecting extent of necrosis. The potassium analog, rubidium-82 (82Rb), is extracted after i.v. injection and retained in viable myocardium but is not trapped or washed out of necrotic regions. To compare myocardial cell metabolism with membrane dysfunction as indicators of necrosis/viability, 43 patients with evolving myocardial infarction and coronary arteriography had positron emission tomography using fluorodeoxyglucose (FDG) and the potassium analog 82Rb. Percent of heart showing FDG defects and 82Rb washout on sequential images indicating failure to retain the potassium analogue were visually assessed and quantified by automated software. Infarct size based on rubidium kinetics correlated closely with size and location on FDG images (visual r = 0.93, automated r = 0.82), suggesting that loss of cell membrane integrity for trapping the potassium analog 82Rb parallels loss of intracellular glucose metabolism, both comparable quantitative markers of myocardial necrosis/viability.

  8. Identification of X-ray spectra in the Na-like to O-like rubidium ions in the range of 3.8-7.3 Å

    NASA Astrophysics Data System (ADS)

    Denis-Petit, D.; Comet, M.; Bonnet, T.; Hannachi, F.; Gobet, F.; Tarisien, M.; Versteegen, M.; Gosselin, G.; Méot, V.; Morel, P.; Pain, J.-Ch.; Gilleron, F.; Frank, A.; Bagnoud, V.; Blazevic, A.; Dorchies, F.; Peyrusse, O.; Cayzac, W.; Roth, M.

    2014-11-01

    The X-rays emitted by a rubidium plasma source created by the PHELIX laser at an intensity of about 6×1014 W/cm2 were studied. The lines have been measured using Bragg crystals in the wavelength range between 3.8 and 7.3 Å and identified by means of a numerical method developed to describe highly charged rubidium ions in LTE plasma. The experimental plasma temperature, density and charge state distributions have been estimated using non-LTE codes such as CHIVAS and AVERROES. The LTE plasma temperature and density used in the calculations are those allowing to reproduce the calculated NLTE charge state distribution. In order to optimize the use of computational resources, a criterion is established to select the configurations contributing most to the spectra among all those obtained in detailed level accounting based on the MCDF code. Seventy Rb X-rays have been identified among which forty-nine are reported for the first time. The capabilities of our method are demonstrated by the good agreement of our identifications with previously published data when available.

  9. Myocardial blood flow assessment with 82rubidium-PET imaging in patients with left bundle branch block

    PubMed Central

    Falcão, Andréa; Chalela, William; Giorgi, Maria Clementina; Imada, Rodrigo; Soares, José; Do Val, Renata; Oliveira, Marco Antonio; Izaki, Marisa; Filho, Roberto Kalil; Meneghetti, José C

    2015-01-01

    OBJECTIVES: Perfusion abnormalities are frequently seen in Single Photon Emission Computed Tomography (SPECT) when a left bundle branch block is present. A few studies have shown decreased coronary flow reserve in the left anterior descending territory, regardless of the presence of coronary artery disease. OBJECTIVE: We sought to investigate rubidium-82 (82Rb) positron emission tomography imaging in the assessment of myocardial blood flow and coronary flow reserve in patients with left bundle branch block. METHODS: Thirty-eight patients with left bundle branch block (GI), median age 63.5 years, 22 (58%) female, 12 with coronary artery disease (≥70%; GI-A) and 26 with no evidence of significant coronary artery disease (GI-B), underwent rest-dipyridamole stress 82Rb-positron emission tomography with absolute quantitative flow measurements using Cedars-Sinai software (mL/min/g). The relative myocardial perfusion and left ventricular ejection fraction were assessed in 17 segments. These parameters were compared with those obtained from 30 patients with normal 82Rb-positron emission tomography studies and without left bundle branch block (GII). RESULTS: Stress myocardial blood flow and coronary flow reserve were significantly lower in GI than in GII (p<0.05). The comparison of coronary flow reserve between GI-A and GI-B showed that it was different from the global coronary flow reserve (p<0.05) and the stress flow was significantly lower in the anterior than in the septal wall for both groups. Perfusion abnormalities were more prevalent in GI-A (p=0.06) and the left ventricular ejection fraction was not different between GI-A and GI-B, whereas it was lower in GI than in GII (p<0.001). CONCLUSION: The data confirm that patients with left bundle branch block had decreased myocardial blood flow and coronary flow reserve and coronary flow reserve assessed by 82Rb-positron emission tomography imaging may be useful in identifying coronary artery disease in patients with

  10. Positron-rubidium scattering

    NASA Technical Reports Server (NTRS)

    Mceachran, R. P.; Horbatsch, M.; Stauffer, A. D.

    1990-01-01

    A 5-state close-coupling calculation (5s-5p-4d-6s-6p) was carried out for positron-Rb scattering in the energy range 3.7 to 28.0 eV. In contrast to the results of similar close-coupling calculations for positron-Na and positron-K scattering the (effective) total integrated cross section has an energy dependence which is contrary to recent experimental measurements.

  11. Rubidium-strontium geochronology and plate-tectonic evolution of the southern part of the Arabian Shield

    USGS Publications Warehouse

    Fleck, Robert J.; Greenwood, W.R.; Hadley, D.G.; Anderson, R.E.; Schmidt, D.L.

    1980-01-01

    Rubidium-strontium studies of Precambrian volcanic and plutonic rocks of the Arabian Shield document an early development of the Arabian craton between 900 and 680 m.y. (million years) ago. Geologic studies indicate an island-arc environment characterized by andesitic (dioritic) magmas, volcaniclastic sedimentation, rapid deposition, and contemporaneous deformation along north or northwest-trending axes. Magmatic trends show consistent variation in both composition and geographic location as a function of age. The oldest units belong to an assemblage of basaltic strata exposed in western Saudi Arabia that yield an age of 1165:!:110 m.y. The oldest andesitic strata studied yield an age of 912:!:76 m.y. The earliest plutonic units are diorite to trondhjemite batholiths that range from 800 to 9,00 m.y. in age and ,occur along the western and southern parts of Saudi Arabia. Younger plutonic units, 680 to 750 m.y. in age, range from quartz diorite to granodiodte and become more abundant in the central and northeastern parts of the Arabian Shield. Initial 'Sr/ 86 Sr ratios for both dioritic groups range from 0.7023 to 0.7030 and average 0.7027. The absence of sialic detritus in sedimentary units and the evidence for an island-arc environment suggest the early development of the Arabian craton at a convergent plate margin between plates of oceanic lithosphere. Active subduction apparently extended from at least 900 m.y. to about 680 m.y. Subsequent to this subduction-related magmatism and tectonism, called the Hijaz tectonic cycle, the Arabian craton was sutured to the late Precambrian African plate in a collisional event. This period of orogeny, represented in Arabia and eastern Africa by the Mozambiquian or Pan-African event, extended from some time before 650 m.y. to at least 540 m.y. and perhaps 520 m.y. B.P. Although the tectonic processes of subduction and continental collision during the 900+ to 500-m.y. period require similar directions of plate convergence, the

  12. The Thermochemical Measurements on Rubidium Compounds: A Comparison of Measured Values with Those Predicted from the NBS Tables of Chemical and Thermodynamic Properties

    NASA Astrophysics Data System (ADS)

    Parker, V. B.; Evans, W. H.; Nuttall, R. L.

    1987-01-01

    This report presents the assessed thermochemical measurements on rubidium compounds upon which the property values, Δf H0, Δf G0, S0, C0p, and H0(T)-H0(0) at 298.15 K and Δf H0(0 K) recommended in the ``NBS Tables of Chemical Thermodynamic Properties'' are based. Included in this set of thermochemical measurements, or thermochemical reaction catalog, is a comparison of the observed values for the processes in question with those predicted (calculated) from the recommended property values in the forementioned tables. The evaluator's initially assigned uncertainties on the experimental measurements and final estimated reliabilities on the recommended process values are given. This paper illustrates the evaluation procedure used in preparing the full set of recommended data in the ``NBS Tables of Chemical Thermodynamic Properties''.

  13. Synthesis and structural characterization of a new rubidium borosulfate, Rb{sub 5}BS{sub 4}O{sub 16}

    SciTech Connect

    Dong, Lingyun; Pan, Shilie; Wang, Ying; Yu, Hongwei; Lin, Xiaoxia; Han, Shujuan

    2015-03-15

    Highlights: • Rb{sub 5}BS{sub 4}O{sub 16} has been synthesized using (NH{sub 4}){sub 2}SO{sub 4} as a source of sulfate ions for the first time. • Zero-dimensional anion groups, [B(SO{sub 4}){sub 4}]{sup 5−}, exist in the title compound. • Spectral properties and thermal analysis of Rb{sub 5}BS{sub 4}O{sub 16} were reported. - Abstract: A new rubidium borosulfate, Rb{sub 5}BS{sub 4}O{sub 16}, has been synthesized using (NH{sub 4}){sub 2}SO{sub 4} as a source of sulfate ions for the first time. The compound crystallizes in the space group P4{sub 3}2{sub 1}2 (No. 96) of the tetragonal system with a = 10.148(4) Å, c = 16.689(14) Å, V = 1718.8(17) Å{sup 3}, and Z = 4. Zero-dimensional anion groups, [B(SO{sub 4}){sub 4}]{sup 5−}, a central BO{sub 4} tetrahedron sharing all its four vertices with neighboring sulfate tetrahedra, exist in the title compound, and then the rubidium atoms are situated in the voids of the resulting structure. The IR spectrum confirms the presence of BO{sub 4} and SO{sub 4} units. The UV–vis-NIR diffuse reflectance spectrum exhibits a band gap of about 3.99 eV. The TG-DSC analysis suggests that Rb{sub 5}BS{sub 4}O{sub 16} is an incongruent melting compound.

  14. 47 CFR Alphabetical Index - Part 78

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Changes in equipment 78.109 Conditions for license 78.27 Coordination, frequencies 78.36 Cross reference... assignments 78.18 Frequency coordination 78.36 Frequency monitors and measurements 78.113 Frequency tolerance 78.111 G-H I Interference 78.19 Inspection of station by FCC 78.57 Installation of equipment 78.107...

  15. 47 CFR 78.115 - Modulation limits.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., frequencies 78.36 Cross reference to other rules 78.3 D Definitions 78.5 E Eligibility for license 78.13... 78.31 F Frequency assignments 78.18 Frequency coordination 78.36 Frequency monitors and measurements 78.113 Frequency tolerance 78.111 G-H I Interference 78.19 Inspection of station by FCC...

  16. 47 CFR 78.115 - Modulation limits.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Modulation limits. 78.115 Section 78.115... Emission designator 78.104 Emissions; emission limitations 78.103 Equal employment opportunities 78.75... Part 78 78.1 Q R Records of station 78.69 Remote control operation 78.51 Rules in other Parts...

  17. Trace analysis of doxylamine succinate in animal feed, human urine, and wastewater by GC using a rubidium-sensitized nitrogen detector

    SciTech Connect

    Thompson, H.C. Jr.; Holder, C.L.; Bowman, M.C.

    1982-08-01

    Doxylamine succinate, a drug used as a sleep-inducing agent, an antihistamine, and in a therapeutic formulation taken by pregnant women as an antinauseant, was scheduled for toxicological evaluation as part of a structure activity relationship study, with rats and mice, because a deficiency of such data exists with regard to many antihistamines. Analytical chemical procedures that ensure proper concentration, homogeneity, and stability of the drug in dosed feed, as well as the safety of personnel and the environment, were prerequisites for the toxicological tests. GC methods using a rubidium-sensitized nitrogen detector were developed for analysis of doxylamine succinate in animal feed, human urine, and wastewater at levels as low as 1 ppm, 100 ppb, and 100 ppb, respectively. Sample extracts were cleaned up by liquid-liquid partitioning, followed by additional cleanup on a column of silica gel. Data are presented concerning the stability of the drug in animal feed, extraction efficiencies, and the use of the silica gel cleanup column to separate the caffeine interference from doxylamine in extracts of human urine. Partition values and ancillary data concerning analysis of the drug in feed, by HPLC at levels as low as 10 ppm, are also reported.

  18. Coherent excitation of the 5D{sub 5/2} level of ultra-cold rubidium atoms with short laser pulses

    SciTech Connect

    Snigirev, S A; Golovizin, A A; Vishnyakova, G A; Akimov, A V; Sorokin, V N; Kolachevskii, N N

    2012-08-31

    We demonstrate the use of stimulated Raman adiabatic passage (STIRAP) for population transfer from the ground state to the 5D{sub 5/2} level (5S{sub 1/2} {yields} 5P{sub 3/2} {yields} 5D{sub 5/2}) in laser-cooled {sup 87}Rb atoms and examine the influence of the time delay between laser pulses, pulse height, pulse duration and frequency detuning from resonance on the efficiency of Rb atom excitation to the 5D{sub 5/2} level. In our experiments, the pulse duration was varied widely (30 - 200 ns), which allowed us to assess the effect of spontaneous decay on the population of the 5D{sub 5/2} level (natural lifetime, 300 ns). We performed numerical calculations with allowance for spontaneous decay from the 5P{sub 3/2} and 5D{sub 5/2} levels and compared the results to experimental data, which allowed the population of the 5D{sub 5/2} level to be determined. The maximum population of the 5D{sub 5/2} level in the region under excitation was 80 % of the total number of rubidium atoms. (cooling of atoms)

  19. Pyroelectric Properties of Potassium and Rubidium Titanyl-Arsenate Single Crystals in the Temperature Range of 4.2-300 K

    SciTech Connect

    Shaldin, Yu. V.; Matyjasik, S.; Novikova, N. E.; Tseitlin, M.; Mozhaev, E.; Roth, M.

    2010-11-15

    The temperature dependences of the pyroelectric coefficients of KTiOAsO{sub 4} and RbTiOAsO{sub 4} single crystals grown by flux crystallization have been investigated in the temperature range of 4.2-300 K. With an increase in temperature, superionic conductivity first arises in KTiOAsO4 (at T > 200 K) and then (at T > 270 K) in RbTiOAsO{sub 4}. This conductivity is much higher in the samples polarized at T = 4.2 K. An exponential change in the crystal resistivity along the polar direction is simultaneously observed. The results of measurements in the range of 4.2-200 K indicate larger values of pyroelectric coefficients when compared with potassium and rubidium titanyl-phosphate crystals. A correlation between the pyroelectric coefficients and a change in the lattice constants at isomorphic substitutions of K atoms for Rb and P atoms for As has been revealed within the symmetry approach.

  20. Observation and Analysis of the 6 1 Σ g + and 3 1Πg states of Rubidium Dimer

    NASA Astrophysics Data System (ADS)

    Ahmed, Ergin; Pan, Xinhua; Lyyra, Marjatta

    2016-05-01

    Detailed knowledge of the excited electronic states of Rubidium dimer is of significant importance to a number of areas of research such as, the production of ultracold ground state molecules, cold atom-molecule collisions, and the development of new ab-initio molecular electronic structure methods. The potential energy curves and transition dipole moments of dozens of electronic states of Rb2 have been calculated. However, only few low-lying electronic states have been experimentally studied and assigned. We report our experimental work and analysis of the 61Σg+ and 31Πg electronic states. In the experiment large number of ro-vibrational levels of the two states were observed using narrow band cw TiSa and dye laser in double resonance cascade configuration. The intermediate states used in the experiment are from the mutually perturbed A1Σg+ ~ b3Πu pair of states. Potential energy curve was generated for each state from the term values of the observed levels.

  1. 47 CFR Alphabetical Index - Part 78

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Part 78 Index Alphabetical Index... Emissions; emission limitations 78.103 Equal employment opportunities 78.75 Equipment changes 78.109... 78.69 Remote control operation 78.51 Rules in other Parts 78.3 Rules, Possession of 78.67 S...

  2. Observing and preventing rubidium runaway in a direct-infusion xenon-spin hyperpolarizer optimized for high-resolution hyper-CEST (chemical exchange saturation transfer using hyperpolarized nuclei) NMR

    SciTech Connect

    Witte, C.; Kunth, M.; Rossella, F.; Schröder, L.

    2014-02-28

    Xenon is well known to undergo host-guest interactions with proteins and synthetic molecules. As xenon can also be hyperpolarized by spin exchange optical pumping, allowing the investigation of highly dilute systems, it makes an ideal nuclear magnetic resonance probe for such host molecules. The utility of xenon as a probe can be further improved using Chemical Exchange Saturation Transfer using hyperpolarized nuclei (Hyper-CEST), but for highly accurate experiments requires a polarizer and xenon infusion system optimized for such measurements. We present the design of a hyperpolarizer and xenon infusion system specifically designed to meet the requirements of Hyper-CEST measurements. One key element of this design is preventing rubidium runaway, a chain reaction induced by laser heating that prevents efficient utilization of high photon densities. Using thermocouples positioned along the pumping cell we identify the sources of heating and conditions for rubidium runaway to occur. We then demonstrate the effectiveness of actively cooling the optical cell to prevent rubidium runaway in a compact setup. This results in a 2–3-fold higher polarization than without cooling, allowing us to achieve a polarization of 25% at continuous flow rates of 9 ml/min of {sup 129}Xe. The simplicity of this design also allows it to be retrofitted to many existing polarizers. Combined with a direction infusion system that reduces shot-to-shot noise down to 0.56% we have captured Hyper-CEST spectra in unprecedented detail, allowing us to completely resolve peaks separated by just 1.62 ppm. Due to its high polarization and excellent stability, our design allows the comparison of underlying theories of host-guest systems with experiment at low concentrations, something extremely difficult with previous polarizers.

  3. Accumulation of potassium, rubidium and caesium (133Cs and 137Cs in various fractions of soil and fungi in a Swedish forest.

    PubMed

    Vinichuk, M; Taylor, A F S; Rosén, K; Johanson, K J

    2010-05-15

    Radiocaesium ((137)Cs) was widely deposited over large areas of forest in Sweden as a result of the Chernobyl accident in 1986 and many people in Sweden eat wild fungi and game obtained from these contaminated forests. In terms of radioisotope accumulation in the food chain, it is well known that fungal sporocarps efficiently accumulate radiocaesium ((137)Cs), as well as the alkali metals potassium (K), rubidium (Rb) and caesium (Cs). The fungi then enhance uptake of these elements into host plants. This study compared the accumulation of these three alkali metals in bulk soil, rhizosphere, soil-root interface, fungal mycelium and sporocarps of mycorrhizal fungi in a Swedish forest. The soil-root interface was found to be distinctly enriched in K and Rb compared with the bulk soil. Potassium concentrations increased in the order: bulk soil

  4. Crystal structures of the potassium and rubidium salts of (3,5-di-chloro-phen-oxy)acetic acid: two isotypic coordination polymers.

    PubMed

    Smith, Graham

    2015-10-01

    The two-dimensional coordination polymeric structures of the hydrated potassium and rubidium salts of (3,5-di-chloro-phen-oxy)acetic acid (3,5-D), namely, poly[μ-aqua-bis-[μ3-2-(3,5-di-chloro-phen-oxy)acetato]-dipotassium], [K2(C8H5Cl2O3)2(H2O)] n , and poly[μ-aqua-bis-[μ3-2-(3,5-di-chloro-phen-oxy)acetato]-dirubidium], [Rb2(C8H5Cl2O3)2(H2O)] n , respectively, have been determined and are described. The two compounds are isotypic and the polymeric structure is based on centrosymmetric dinuclear bridged complex units. The irregular six-coordination about the alkali cations comprises a bridging water mol-ecule lying on a twofold rotation axis, the phen-oxy O-atom donor and a triple bridging carboxyl-ate O atom of the oxo-acetate side chain of the 3,5-D ligand, and the second carb-oxy-ate O-atom donor also bridging. The K-O and Rb-O bond-length ranges are 2.7238 (15)-2.9459 (14) and 2.832 (2)-3.050 (2) Å, respectively, and the K⋯K and Rb⋯Rb separations in the dinuclear units are 4.0214 (7) and 4.1289 (6) Å, respectively. Within the layers which lie parallel to (100), the coordinating water mol-ecule forms an O-H⋯O hydrogen bond to the single bridging carboxyl-ate O atom. PMID:26594400

  5. Normal Myocardial Flow Reserve in HIV-Infected Patients on Stable Antiretroviral Therapy: A Cross-Sectional Study Using Rubidium-82 PET/CT.

    PubMed

    Knudsen, Andreas; Christensen, Thomas E; Ghotbi, Adam Ali; Hasbak, Philip; Lebech, Anne-Mette; Kjær, Andreas; Ripa, Rasmus Sejersten

    2015-10-01

    Studies have found HIV-infected patients to be at increased risk of myocardial infarction, which may be caused by coronary microvascular dysfunction. For the first time among HIV-infected patients, we assessed the myocardial flow reserve (MFR) by Rubidium-82 (82Rb) positron emission tomography (PET), which can quantify the coronary microvascular function. MFR has proved highly predictive of future coronary artery disease and cardiovascular events in the general population.In a prospective cross-sectional study, HIV-infected patients all receiving antiretroviral therapy (ART) with full viral suppression and HIV-uninfected controls were scanned using 82Rb PET/computed tomography at rest and adenosine-induced stress, thereby obtaining the MFR (stress flow/rest flow), stratified into low ≤1.5, borderline >1.5 to 2.0, or normal >2.0.Fifty-six HIV-infected patients and 25 controls were included. The HIV-infected patients had a mean age of 53 years (range 37-68 years) with 23% active smokers. The controls had a mean age of 52 years (range 36-68 years) and 26% active smokers. In the HIV-infected group 73% had a normal MFR, 17% borderline, and 10% low values of MFR. Among controls these values were 71%, 19%, and 10%, respectively (P = 0.99). However, the HIV-infected group had lower values of stress myocardial blood flow (MBF) (2.63 ± 0.09 mL/g/min vs 2.99 ± 0.14 mL/g/min; P = 0.03). We found no evidence of decreased MFR as assessed by 82Rb PET among HIV-infected patients on stable ART with full viral suppression compared with HIV-uninfected controls. We did notice a decreased MBF during stress. PMID:26512605

  6. Cessna UC-78 Bobcat

    NASA Technical Reports Server (NTRS)

    1944-01-01

    Cessna UC-78 Bobcat: Known by some as the 'Double-breasted Cub, ' the Cessna UC-78 Bobcat was the Cessna model T-50 produced for the Air Corps during World War II as a light personnel transport. Versions were also ordered to train pilots on multi-engine aircraft. This example served with the NACA at Langley from the summer 1944 until summer 1945.

  7. Rubidium(I) monensinate dihydrate.

    PubMed

    Yıldırım, Sema Öztürk; McKee, Vickie; Khardli, Fatim-Zahra; Mimouni, Mostafa; Hadda, Taibi Ben

    2007-01-01

    In the title complex, [Rb(C(36)H(61)O(11))]·2H(2)O, the Rb(+) cation is coordinated by seven O atoms of monensin. Rb-O distances range from 2.7870 (17) to 3.1429 (17) Å. Both O atoms of the carboxyl-ate group are involved in the coordination of Rb. The structure displays inter- and intra-molecular O-H⋯O and C-H⋯O hydrogen-bonding inter-actions. PMID:21200506

  8. An ultra-stable optical frequency standard for telecommunication purposes based upon the 5S1/2 → 5D5/2 two-photon transition in rubidium

    NASA Astrophysics Data System (ADS)

    Terra, Osama; Hussein, Hatem

    2016-02-01

    In this study, we report the development of a frequency standard for optical fiber communication applications based on a two-photon transition in rubidium at 385.2 THz. This standard kills two birds with one stone in the sense it is capable of providing us with two highly stable serviceable wavelengths at 778.1 and 1556.2 nm. In this system, we exploit the narrow line-width of a fiber laser emitting at 1556.2 nm in conjunction with an erbium-doped fiber amplifier to generate a sufficient second harmonic laser beam at 778.1 nm in a periodically polled lithium niobate waveguide mixer in order to probe and frequency-lock the laser to the 5S1/2 ( F g = 3)-5D5/2 ( F e = 5) hyperfine two-photon transition component in 85Rb. The metrological performance of the standard is evaluated with the aid of an optical frequency comb synthesizer. Allan variance measurement shows a stability of 4 × 10-12 at 1 s (limited by the comb stability), reaching a floor of 6.8 × 10-13 at 1000 s. After correction of all the major systematic frequency shifts including the light shift, the absolute frequency is found to be 385 285 142 374.0 (5.0) kHz. Moreover, the absolute frequencies of most of the hyperfine components of the 5S1/2-5D5/2 transition of the two naturally existing rubidium isotopes are measured using a femtosecond frequency comb synthesizer after stabilizing a laser on each component.

  9. 78 FR 48138 - Notice

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-07

    .... 78 FR 9359 (Feb. 8, 2013). The TDO previously had been renewed on September 17, 2008, March 16, 2009..., 2011. 77 FR 64,427 (October 18, 2011). The February 4, 2013 Order laid out further evidence of... Airways-Istanbul Office, Cumhuriye Cad. Sibil Apt No: 101 D:6, 34374 Emadad, Sisli Istanbul, Turkey....

  10. 78 FR 66427 - Crowdfunding

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-05

    ... out the best investments and limiting fraud--can be solved by tapping the `wisdom of crowds' over the... (July 10, 2013) [78 FR 44771 (July 24, 2013)] (``General Solicitation Adopting Release'') (adopting... efforts will assist the Commission in evaluating the development of market practices in offerings made...

  11. Single-Crystal Raman Spectroscopy of the Rubidium Alums RbM(III)(SO(4))(2).12H(2)O (M(III) = Al, Ga, In, Ti, V, Cr, Fe) between 275 and 1200 cm(-)(1): Correlation between the Electronic Structure of the Tervalent Cation and Structural Abnormalities.

    PubMed

    Tregenna-Piggott, Philip L. W.; Best, Stephen P.

    1996-09-11

    Low-temperature single-crystal Raman spectra for RbM(III)(SO(4))(2).12H(2)O (M(III) = Al, Ga, In, Ti, V, Cr, Fe) and RbM(III)(SO(4))(2).12D(2)O (M(III) = Al, V) have been collected and assigned in the range 275-1200 cm(-)(1). These results permit classification of the Ti and V rubidium sulfate alums to the beta modification, whereas the remaining tervalent cations give the expected alpha modification. The dimorphism of the rubidium sulfate alums is explained in terms of the electronic structure of the tervalent cation, where the observation of the beta modification is associated with unequal occupancy of the t(2g) (O(h)()) orbitals. For the rubidium vanadium alums the (3)E(g) <-- (3)A(g) electronic Raman (eR) transition permits quantification of the trigonal field splitting of the t(2g) (O(h)()) orbitals (ca. 1940 cm(-)(1)). The profile of the eR band is sensitive both to changes in temperature and to deuteration. Analysis of the eR band profile suggests a reduced spin-orbit splitting of the (3)E(g) manifold, this being ascribed to excited state Jahn-Teller (J-T) effects. The similarity of the Raman spectra of the cesium and rubidium titanium sulfate alums suggest that they exhibit closely related structural chemistry, with both subject to phase transitions below 80 K. The observation that modes of E(g) symmetry are coupled to the structural change is consistent with the interpretation that the trigonal field leaves an orbital doublet ground term for titanium(III), leading to a cooperative J-T effect. PMID:11666769

  12. 40 CFR 78.7 - [Reserved

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 17 2013-07-01 2013-07-01 false 78.7 Section 78.7 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL PROCEDURES § 78.7...

  13. 40 CFR 78.7 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false 78.7 Section 78.7 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL PROCEDURES § 78.7...

  14. 78 FR 69517 - Commission Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-19

    ... published in 78 FR 38782, June 27, 2013, was subject to a comment deadline of August 26, 2013.Written... published in 78 FR 64260, October 28, 2013. Authority: Public Law 91-575, 84 Stat. 1509 et seq., 18 CFR... From the Federal Register Online via the Government Publishing Office SUSQUEHANNA RIVER...

  15. High-lying electronic states of the rubidium dimer—Ab initio predictions and experimental observation of the 5 1 Σu + and 51Πu states of Rb2 by polarization labelling spectroscopy

    NASA Astrophysics Data System (ADS)

    Jastrzebski, Wlodzimierz; Kowalczyk, Pawel; Szczepkowski, Jacek; Allouche, Abdul-Rahman; Crozet, Patrick; Ross, Amanda J.

    2015-07-01

    Two-colour polarization labelling experiments have been used to explore the excitation spectrum of the rubidium dimer in the region 25 500-27 000 cm-1, probing two mutually interacting states, identified from ab initio calculations as the 5 1 Σu + and 51Πu states whose atomic dissociation products are Rb(5s) + Rb(5d). Treating the rather irregular progressions observed in the excitation spectra as transitions to single states with (numerous) local perturbations, we propose spectroscopic parameters and potential energy curves to describe the investigated levels. Observations cover more than 20 vibrational levels in the inner minima of both the 51Πu and 5 1 Σu + states. Analysis was guided by ab initio calculations performed to describe the 1,3Λg,u electronic states of Rb2 up to the Rb(5s) + Rb(5f) atomic asymptote. The theoretical potential energy curves are given in ASCII format in an electronic supplement to this paper.

  16. Synthesis, Raman and X-ray diffraction investigations of rubidium-doped Gd 1.8Ti 2O 6.7 pyrochlore oxide via a sol-gel process

    NASA Astrophysics Data System (ADS)

    Garbout, A.; Bouattour, S.; Botelho do Rego, A. M.; Ferraria, A.; Kolsi, A. W.

    2007-06-01

    Nanoparticles of rubidium-doped gadolinium titanates oxide were prepared by the sol-gel process from the titanium alcoxyde Ti(OBu) 4 and the two oxides Rb 2CO 3 and Gd 2O 3. Thermal gravimetric (TG) and differential thermal analysis (DTA) results suggest that thermal decomposition of the xerogel takes place when the xerogel is heated at 400 °C. X-ray powder diffraction (XRD) measurements were carried out to study the structure evolution of the sample and to determine the crystalline phases present after heat treatment. A well-crystallized single-phased nanopowder was obtained after calcination at 1000 °C. X-ray diffraction combined to the Raman analysis confirmed the powder's single-phase nature at this temperature. The Rb + did not enter the pyrochlore crystal lattice to substitute Gd 3+ or Ti 4+ as shown by XRD and X-ray photoelectron spectroscopy (XPS). It is probably dispersed uniformly onto gadolinium titanate nanoparticles. Crystal structure of the non-stoichiometry pyrochlore Rb +-doped phase Gd 1.8Ti 2O 6.7, was determined using the Rietveld method. Conductivity analysis shows that the presence of Rb + dopant in Gd 1.8Ti 2O 6.7 leads to an increase of the ionic conductivity compared to the non-doped Gd 1.8Ti 2O 6.7.

  17. Discrimination of the effects of saturation and optical pumping in velocity-dependent pump-probe spectroscopy of rubidium: A simple analytical study

    SciTech Connect

    Noh, Heung-Ryoul; Moon, Geol; Jhe, Wonho

    2010-12-15

    This paper presents a simple analytical theory for the velocity-dependent pump-probe laser spectroscopy of {sup 87}Rb and {sup 85}Rb atoms where the pump and the probe beams are circularly or linearly polarized. The analytical solutions of the line shapes of the velocity-selective optical pumping spectroscopy [G. Moon and H. R. Noh, Phys. Rev. A 78, 032506 (2008)] and saturated absorption spectroscopy [G. Moon and H. R. Noh, J. Opt. Soc. Am. B 25, 701 (2008); 27, 1741 (2010)] obtained in the previous reports, expressed as a sum of several Lorentzian functions, could be approximated as one (or in some cases, two) Lorentzian function(s). In particular, the contributions of the saturation and optical pumping effects could be discriminated explicitly in these simple analytical solutions, which is not possible in existing theories such as Nakayama's model. The simple analytical results for the saturation spectroscopy were compared with experimental results, and good agreement between them was observed.

  18. 78 FR 60667 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... incorporation by reference of a certain other publication listed in this AD as of January 24, 2013 (78 FR 1723... 2, 2013 (78 FR 25666), and proposed to supersede AD 2012-26-51, Amendment 39-17312 (78 FR 1723... (78 FR 1723, January 9, 2013)] to require amendment of the AFM by incorporating the Airbus TR....

  19. 47 CFR 78.18 - Frequency assignments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... channel. Editorial Note: For Federal Register citations affecting § 78.18, see the List of CFR Sections... 47 Telecommunication 4 2014-10-01 2014-10-01 false Frequency assignments. 78.18 Section 78.18... SERVICE Applications and Licenses § 78.18 Frequency assignments. (a) The Cable Television Relay Service...

  20. 47 CFR 78.18 - Frequency assignments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... channel. Editorial Note: For Federal Register citations affecting § 78.18, see the List of CFR Sections... 47 Telecommunication 4 2013-10-01 2013-10-01 false Frequency assignments. 78.18 Section 78.18... SERVICE Applications and Licenses § 78.18 Frequency assignments. (a) The Cable Television Relay Service...

  1. Noninvasive assessment of coronary stenoses by myocardial perfusion imaging during pharmacologic coronary vasodilation. VIII. Clinical feasibility of positron cardiac imaging without a cyclotron using generator-produced rubidium-82

    SciTech Connect

    Gould, K.L.; Goldstein, R.A.; Mullani, N.A.; Kirkeeide, R.L.; Wong, W.H.; Tewson, T.J.; Berridge, M.S.; Bolomey, L.A.; Hartz, R.K.; Smalling, R.W.

    1986-04-01

    The purpose of this study was to determine the clinical feasibility of diagnosing significant coronary artery disease by positron imaging of myocardial perfusion without a cyclotron, using generator-produced rubidium-82 (/sup 82/Rb). Fifty patients underwent positron emission tomography of the entire heart using a multislice positron camera and intravenous /sup 82/Rb or nitrogen-13 ammonia (/sup 13/NH/sub 3/) before and after intravenous dipyridamole combined with handgrip stress. Images were read by two observers blinded as to clinical or arteriographic data. Automated quantitative coronary arteriography was obtained for the arteriographic determination of coronary flow reserve, previously demonstrated to be a single integrated measure of stenosis severity accounting for all its geometric dimensions of length, absolute diameter, percent narrowing and asymmetry by quantitative analysis of cine films. Significant coronary artery disease was defined as an arteriographically determined coronary flow reserve of less than 3.0 based on all stenosis dimensions. Any single geometric measure of stenosis severity alone was an inadequate reference standard for comparison with perfusion images. Sensitivity of identifying patients with coronary artery disease having an arteriographically determined coronary flow reserve of less than 3.0 was 95% by positron imaging with a specificity of 100%. The single case that was missed, studied with /sup 13/NH/sub 3/, had a 43% diameter narrowing of a small ramus intermedius off the left coronary artery with no significant narrowing of the major coronary arteries. Positron emission tomography of myocardial perfusion before and after intravenous dipyridamole combined with handgrip stress utilizing generator-produced /sup 82/Rb provides sensitive and specific diagnosis of reduced coronary flow reserve due to coronary artery disease in humans.

  2. Modeling Starspots on Kepler-78

    NASA Astrophysics Data System (ADS)

    Mayo, Andrew; Vanderburg, Andrew; Dumusque, Xavier; Johnson, John A.

    2016-01-01

    Kepler-78 is a late G-type star which hosts Kepler-78b, an Earth-sized planet in an 8.5 hour orbit. The mass of Kepler-78b has been measured using the radial velocity technique, but this measurement is complicated by significant stellar activity, especially starspots. We present a new method for modeling starspots by applying a Markov Chain Monte Carlo process to the SOAP 2.0 starspot model. We apply this method to all available data simultaneously, including measurements of radial velocity, bisector span, and full width at half maximum. We recover the mass of Kepler-78b with excellent agreement to previous mass estimates. We also characterize the starspots of Kepler-78, constraining the latitude, longitude, size, and temperature of each spot group, and finding evidence of starspot evolution. Importantly, using both radial velocity measurements and line shape diagnostics seems to break the degeneracy between spot size and spot temperature. If this is correct, we also find that the starspots are warmer than one would expect of a G-type star. Our method of modeling starspots will allow us to better understand the surface phenomena of stars, as well as the properties of their planetary systems.

  3. 45 CFR 81.78 - Evidence.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 1 2011-10-01 2011-10-01 false Evidence. 81.78 Section 81.78 Public Welfare... 80 OF THIS TITLE Hearing Procedures § 81.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  4. 45 CFR 81.78 - Evidence.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 1 2014-10-01 2014-10-01 false Evidence. 81.78 Section 81.78 Public Welfare... 80 OF THIS TITLE Hearing Procedures § 81.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  5. 34 CFR 101.78 - Evidence.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 34 Education 1 2012-07-01 2012-07-01 false Evidence. 101.78 Section 101.78 Education Regulations... PRACTICE AND PROCEDURE FOR HEARINGS UNDER PART 100 OF THIS TITLE Hearing Procedures § 101.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  6. 34 CFR 101.78 - Evidence.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 34 Education 1 2010-07-01 2010-07-01 false Evidence. 101.78 Section 101.78 Education Regulations... PRACTICE AND PROCEDURE FOR HEARINGS UNDER PART 100 OF THIS TITLE Hearing Procedures § 101.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  7. 45 CFR 81.78 - Evidence.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Evidence. 81.78 Section 81.78 Public Welfare... 80 OF THIS TITLE Hearing Procedures § 81.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  8. 34 CFR 101.78 - Evidence.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 34 Education 1 2013-07-01 2013-07-01 false Evidence. 101.78 Section 101.78 Education Regulations... PRACTICE AND PROCEDURE FOR HEARINGS UNDER PART 100 OF THIS TITLE Hearing Procedures § 101.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  9. 45 CFR 81.78 - Evidence.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 1 2012-10-01 2012-10-01 false Evidence. 81.78 Section 81.78 Public Welfare... 80 OF THIS TITLE Hearing Procedures § 81.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  10. 45 CFR 81.78 - Evidence.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 1 2013-10-01 2013-10-01 false Evidence. 81.78 Section 81.78 Public Welfare... 80 OF THIS TITLE Hearing Procedures § 81.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  11. 34 CFR 101.78 - Evidence.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 34 Education 1 2014-07-01 2014-07-01 false Evidence. 101.78 Section 101.78 Education Regulations... PRACTICE AND PROCEDURE FOR HEARINGS UNDER PART 100 OF THIS TITLE Hearing Procedures § 101.78 Evidence. Irrelevant, immaterial, unreliable, and unduly repetitious evidence will be excluded....

  12. 20 CFR 632.78 - Training activities.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Training activities. 632.78 Section 632.78 Employees' Benefits EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN EMPLOYMENT AND TRAINING PROGRAMS Program Design and Management § 632.78 Training activities. Native...

  13. 32 CFR 78.7 - Standard agreement.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 1 2010-07-01 2010-07-01 false Standard agreement. 78.7 Section 78.7 National... VOLUNTARY STATE TAX WITHHOLDING FROM RETIRED PAY § 78.7 Standard agreement. Standard Agreement For Voluntary..., hereafter referred to as the “Standard Agreement,” establishes administrative procedures and...

  14. 9 CFR 78.4 - [Reserved

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 9 Animals and Animal Products 1 2011-01-01 2011-01-01 false 78.4 Section 78.4 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS General Provisions § 78.4...

  15. 7 CFR 3201.78 - Blast media.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... purchasing programs. The designation can be found in the Comprehensive Procurement Guideline, 40 CFR 247.17. ... 7 Agriculture 15 2013-01-01 2013-01-01 false Blast media. 3201.78 Section 3201.78 Agriculture... Items § 3201.78 Blast media. (a) Definition. Abrasive particles sprayed forcefully to clean,...

  16. 7 CFR 3201.78 - Blast media.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... purchasing programs. The designation can be found in the Comprehensive Procurement Guideline, 40 CFR 247.17. ... 7 Agriculture 15 2014-01-01 2014-01-01 false Blast media. 3201.78 Section 3201.78 Agriculture... Items § 3201.78 Blast media. (a) Definition. Abrasive particles sprayed forcefully to clean,...

  17. 22 CFR 62.78 - Termination.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 22 Foreign Relations 1 2012-04-01 2012-04-01 false Termination. 62.78 Section 62.78 Foreign Relations DEPARTMENT OF STATE PUBLIC DIPLOMACY AND EXCHANGES EXCHANGE VISITOR PROGRAM Student and Exchange Visitor Information System (SEVIS) § 62.78 Termination. An exchange visitor who willfully or...

  18. 22 CFR 62.78 - Termination.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 22 Foreign Relations 1 2011-04-01 2011-04-01 false Termination. 62.78 Section 62.78 Foreign Relations DEPARTMENT OF STATE PUBLIC DIPLOMACY AND EXCHANGES EXCHANGE VISITOR PROGRAM Student and Exchange Visitor Information System (SEVIS) § 62.78 Termination. An exchange visitor who willfully or...

  19. 22 CFR 62.78 - Termination.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 22 Foreign Relations 1 2013-04-01 2013-04-01 false Termination. 62.78 Section 62.78 Foreign Relations DEPARTMENT OF STATE PUBLIC DIPLOMACY AND EXCHANGES EXCHANGE VISITOR PROGRAM Student and Exchange Visitor Information System (SEVIS) § 62.78 Termination. An exchange visitor who willfully or...

  20. 22 CFR 62.78 - Termination.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 22 Foreign Relations 1 2014-04-01 2014-04-01 false Termination. 62.78 Section 62.78 Foreign Relations DEPARTMENT OF STATE PUBLIC DIPLOMACY AND EXCHANGES EXCHANGE VISITOR PROGRAM Student and Exchange Visitor Information System (SEVIS) § 62.78 Termination. An exchange visitor who willfully or...

  1. 9 CFR 78.42 - Quarantined areas.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 9 Animals and Animal Products 1 2013-01-01 2013-01-01 false Quarantined areas. 78.42 Section 78.42 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Brucellosis Areas § 78.42 Quarantined areas. None....

  2. 9 CFR 78.42 - Quarantined areas.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Quarantined areas. 78.42 Section 78.42 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Brucellosis Areas § 78.42 Quarantined areas. None....

  3. 9 CFR 78.42 - Quarantined areas.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 9 Animals and Animal Products 1 2011-01-01 2011-01-01 false Quarantined areas. 78.42 Section 78.42 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Brucellosis Areas § 78.42 Quarantined areas. None....

  4. 9 CFR 78.42 - Quarantined areas.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 9 Animals and Animal Products 1 2012-01-01 2012-01-01 false Quarantined areas. 78.42 Section 78.42 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE... Brucellosis Areas § 78.42 Quarantined areas. None....

  5. 47 CFR 78.101 - Power limitations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Power limitations. 78.101 Section 78.101... SERVICE Technical Regulations § 78.101 Power limitations. (a) On any authorized frequency, the average power delivered to an antenna shall be the minimum amount of power necessary to carry out...

  6. 32 CFR 78.6 - Responsibilities.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 1 2011-07-01 2011-07-01 false Responsibilities. 78.6 Section 78.6 National Defense Department of Defense OFFICE OF THE SECRETARY OF DEFENSE PERSONNEL, MILITARY AND CIVILIAN VOLUNTARY STATE TAX WITHHOLDING FROM RETIRED PAY § 78.6 Responsibilities. (a) The Assistant Secretary...

  7. 32 CFR 78.6 - Responsibilities.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 1 2014-07-01 2014-07-01 false Responsibilities. 78.6 Section 78.6 National Defense Department of Defense OFFICE OF THE SECRETARY OF DEFENSE PERSONNEL, MILITARY AND CIVILIAN VOLUNTARY STATE TAX WITHHOLDING FROM RETIRED PAY § 78.6 Responsibilities. (a) The Assistant Secretary...

  8. 32 CFR 78.6 - Responsibilities.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 1 2013-07-01 2013-07-01 false Responsibilities. 78.6 Section 78.6 National Defense Department of Defense OFFICE OF THE SECRETARY OF DEFENSE PERSONNEL, MILITARY AND CIVILIAN VOLUNTARY STATE TAX WITHHOLDING FROM RETIRED PAY § 78.6 Responsibilities. (a) The Assistant Secretary...

  9. 48 CFR 452.236-78 - [Reserved

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 48 Federal Acquisition Regulations System 4 2011-10-01 2011-10-01 false 452.236-78 Section 452.236-78 Federal Acquisition Regulations System DEPARTMENT OF AGRICULTURE CLAUSES AND FORMS SOLICITATION PROVISIONS AND CONTRACT CLAUSES Texts of Provisions and Clauses 452.236-78...

  10. 47 CFR 78.105 - Antenna systems.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Antenna systems. 78.105 Section 78.105... SERVICE Technical Regulations § 78.105 Antenna systems. (a) For fixed stations operating in the 12.7-13.2... directional antennas that meet the performance standards indicated in the following table. (i) Stations...

  11. 47 CFR 78.105 - Antenna systems.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Antenna systems. 78.105 Section 78.105... SERVICE Technical Regulations § 78.105 Antenna systems. (a) For fixed stations operating in the 12.7-13.2... directional antennas that meet the performance standards indicated in the following table. (i) Stations...

  12. 47 CFR 78.105 - Antenna systems.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Antenna systems. 78.105 Section 78.105... SERVICE Technical Regulations § 78.105 Antenna systems. (a) For fixed stations operating in the 12.7-13.2... directional antennas that meet the performance standards indicated in the following table. (i) Stations...

  13. 78 FR 59658 - Procurement List; Additions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-27

    ... INFORMATION: Additions On 7/26/2013 (78 FR 45183); 8/9/2013 (78 FR 48656-48657) and 8/16/ 2013 (78 FR 50040...-00-NIB-0014--Medium Duty, \\1/16\\'' Hole Size. NPA: Bestwork Industries for the Blind, Inc., Runnemede... Total Government Requirement as aggregated by the General Services Administration. Services Service...

  14. 40 CFR 78.11 - Intervenors.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 17 2013-07-01 2013-07-01 false Intervenors. 78.11 Section 78.11 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL PROCEDURES § 78.11 Intervenors. (a) Within 30 days (or other shorter, reasonable period established by...

  15. 40 CFR 78.2 - General.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 17 2013-07-01 2013-07-01 false General. 78.2 Section 78.2 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL PROCEDURES § 78.2 General. (a) Definitions. (1) The terms used in this subpart with regard to a decision of...

  16. 40 CFR 78.4 - Filings.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 17 2013-07-01 2013-07-01 false Filings. 78.4 Section 78.4 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL PROCEDURES § 78.4 Filings. (a)(1) All original filings made under this part shall be signed by the person...

  17. 78 FR 63967 - Procurement List; Additions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-25

    ... 8/9/2013 (78 FR 48656-48657), 8/16/2013 (78 FR 50040), and 8/23/ 2013 (78 FR 52512-52513), the.../Location: Base Supply Center Service, Georgia National Guard, Clay National Guard Center, 1356 Atlanta...

  18. 46 CFR 78.17-25 - Sanitation.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Sanitation. 78.17-25 Section 78.17-25 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Tests, Drills, and Inspections § 78.17-25 Sanitation. (a) It shall be the duty of the master and chief engineer to see that...

  19. 46 CFR 78.17-25 - Sanitation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 3 2011-10-01 2011-10-01 false Sanitation. 78.17-25 Section 78.17-25 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Tests, Drills, and Inspections § 78.17-25 Sanitation. (a) It shall be the duty of the master and chief engineer to see that...

  20. 78 FR 67129 - Procurement List; Additions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-08

    ... 8/23/2013 (78 FR 52512-52513), 8/30/2013 (78 FR 53734), and 9/6/ 2013 (78 FR 54871), the Committee... PEOPLE WHO ARE BLIND OR SEVERELY DISABLED Procurement List; Additions AGENCY: Committee for Purchase From People Who Are Blind or Severely Disabled. ACTION: Additions to the Procurement List. SUMMARY:...

  1. 40 CFR 98.78 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 22 2012-07-01 2012-07-01 false Definitions. 98.78 Section 98.78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Ammonia Manufacturing § 98.78 Definitions. All terms used in this subpart have...

  2. 40 CFR 98.78 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 21 2014-07-01 2014-07-01 false Definitions. 98.78 Section 98.78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Ammonia Manufacturing § 98.78 Definitions. All terms used in this subpart have...

  3. 40 CFR 98.78 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 22 2013-07-01 2013-07-01 false Definitions. 98.78 Section 98.78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Ammonia Manufacturing § 98.78 Definitions. All terms used in this subpart have...

  4. 78 FR 68823 - Procurement List Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-15

    ... 9/6/2013 (78 FR 54871), 9/13/2013 (78 FR 56680) and 9/20/2013 (78 FR 57844), the Committee for... Procurement List. After consideration of the relevant matter presented, the Committee has determined that the..., OH. Contracting Activity: GSA/Public Buildings Service, Property Management Service Center,...

  5. 78 FR 54377 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-04

    ... to the specified products. The NPRM was published in the Federal Register on February 26, 2013 (78 FR... that paragraph (i) of the NPRM (78 FR 12988, February 26, 2013) be revised to delete the word ``new... Vendor Service Information Airbus requested that paragraphs (g), (h), and (i) of the NPRM (78 FR...

  6. 9 CFR 78.14 - Rodeo cattle.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... the requirements for cattle in this subpart and in 9 CFR part 86. (Approved by the Office of... 9 Animals and Animal Products 1 2014-01-01 2014-01-01 false Rodeo cattle. 78.14 Section 78.14... Interstate Movement of Cattle Because of Brucellosis § 78.14 Rodeo cattle. (a) Rodeo cattle that are...

  7. 40 CFR 98.78 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 98.78 Section 98.78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Ammonia Manufacturing § 98.78 Definitions. All terms used in this subpart have...

  8. 40 CFR 98.78 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 21 2011-07-01 2011-07-01 false Definitions. 98.78 Section 98.78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) MANDATORY GREENHOUSE GAS REPORTING Ammonia Manufacturing § 98.78 Definitions. All terms used in this subpart have...

  9. 47 CFR 78.23 - Equipment tests.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Equipment tests. 78.23 Section 78.23... SERVICE Applications and Licenses § 78.23 Equipment tests. (a) Following the grant of a CARS license, the... Commission, conduct equipment tests for the purpose of such adjustments and measurements as may be...

  10. 47 CFR 78.23 - Equipment tests.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Equipment tests. 78.23 Section 78.23... SERVICE Applications and Licenses § 78.23 Equipment tests. (a) Following the grant of a CARS license, the... Commission, conduct equipment tests for the purpose of such adjustments and measurements as may be...

  11. 78 FR 64162 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-28

    ... Register on July 3, 2013 (78 FR 40074). The NPRM proposed to correct an unsafe condition for the specified... on the NPRM (78 FR 40074, July 3, 2013) or on the determination of the cost to the public. Conclusion... changes: Are consistent with the intent that was proposed in the NPRM (78 FR 40074, July 3, 2013)...

  12. 36 CFR 1150.78 - Public documents.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 36 Parks, Forests, and Public Property 3 2010-07-01 2010-07-01 false Public documents. 1150.78 Section 1150.78 Parks, Forests, and Public Property ARCHITECTURAL AND TRANSPORTATION BARRIERS COMPLIANCE BOARD PRACTICE AND PROCEDURES FOR COMPLIANCE HEARINGS Hearing Procedures § 1150.78 Public...

  13. 45 CFR 78.2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Definitions. 78.2 Section 78.2 Public Welfare... BENEFITS § 78.2 Definitions. For the purposes of denying Federal benefits under 21 U.S.C. 853a: (a) Deemed... of Rehabilitation Facilities, or the Council on Accreditation of Services for Families and...

  14. 46 CFR 78.30-15 - Watchmen.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Watchmen. 78.30-15 Section 78.30-15 Shipping COAST GUARD..., Patrolmen, and Watchmen § 78.30-15 Watchmen. (a) The provisions of this section shall apply to all vessels... applicable at all times when passengers are on board. (b) During the nighttime, a suitable number of...

  15. 78 FR 60798 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ..., 2013 (78 FR 25902). The earlier NPRM proposed to require actions intended to address the unsafe condition for the products listed above. Actions Since Previous NPRM Was Issued Since the NPRM (78 FR 25902... NPRM (78 FR 25902, May 3, 2013). The following presents the comments received on the NPRM and the...

  16. 7 CFR 1412.78 - Violations.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 10 2014-01-01 2014-01-01 false Violations. 1412.78 Section 1412.78 Agriculture Regulations of the Department of Agriculture (Continued) COMMODITY CREDIT CORPORATION, DEPARTMENT OF...) Program § 1412.78 Violations. (a)(1) If a participant fails to carry out the terms and conditions of...

  17. 7 CFR 1412.78 - Violations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 10 2011-01-01 2011-01-01 false Violations. 1412.78 Section 1412.78 Agriculture Regulations of the Department of Agriculture (Continued) COMMODITY CREDIT CORPORATION, DEPARTMENT OF...) Program § 1412.78 Violations. (a)(1) If a participant fails to carry out the terms and conditions of...

  18. 7 CFR 1412.78 - Violations.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 10 2012-01-01 2012-01-01 false Violations. 1412.78 Section 1412.78 Agriculture Regulations of the Department of Agriculture (Continued) COMMODITY CREDIT CORPORATION, DEPARTMENT OF...) Program § 1412.78 Violations. (a)(1) If a participant fails to carry out the terms and conditions of...

  19. 7 CFR 1412.78 - Violations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 10 2010-01-01 2010-01-01 false Violations. 1412.78 Section 1412.78 Agriculture Regulations of the Department of Agriculture (Continued) COMMODITY CREDIT CORPORATION, DEPARTMENT OF...) Program § 1412.78 Violations. (a)(1) If a participant fails to carry out the terms and conditions of...

  20. 7 CFR 1412.78 - Violations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 10 2013-01-01 2013-01-01 false Violations. 1412.78 Section 1412.78 Agriculture Regulations of the Department of Agriculture (Continued) COMMODITY CREDIT CORPORATION, DEPARTMENT OF...) Program § 1412.78 Violations. (a)(1) If a participant fails to carry out the terms and conditions of...

  1. 9 CFR 78.4 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false 78.4 Section 78.4 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS General Provisions § 78.4...

  2. 47 CFR 78.36 - Frequency coordination.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... in 47 CFR 101.105(a), (b), and (c) and the following frequency usage coordination procedures will... 47 Telecommunication 4 2010-10-01 2010-10-01 false Frequency coordination. 78.36 Section 78.36... SERVICE Applications and Licenses § 78.36 Frequency coordination. (a) Coordination of all...

  3. 78 FR 57784 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-20

    ... apply to the specified products. The NPRM published in the Federal Register on June 21, 2013 (78 FR... comments on the NPRM (78 FR 37498, June 21, 2013) or on the determination of the cost to the public... changes: Are consistent with the intent that was proposed in the NPRM (78 FR 37498, June 21, 2013)...

  4. 49 CFR 7.8 - Copies

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 1 2010-10-01 2010-10-01 false Copies 7.8 Section 7.8 Transportation Office of the Secretary of Transportation PUBLIC AVAILABILITY OF INFORMATION Information Required To Be Made Public by DOT § 7.8 Copies Copies of any material covered by this subpart that is not published...

  5. 7 CFR 948.78 - Accounting.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 8 2014-01-01 2014-01-01 false Accounting. 948.78 Section 948.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... Order Regulating Handling Expenses and Assessments § 948.78 Accounting. (a) If, at the end of a...

  6. 7 CFR 948.78 - Accounting.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 8 2013-01-01 2013-01-01 false Accounting. 948.78 Section 948.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... Order Regulating Handling Expenses and Assessments § 948.78 Accounting. (a) If, at the end of a...

  7. 7 CFR 948.78 - Accounting.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 8 2012-01-01 2012-01-01 false Accounting. 948.78 Section 948.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... Order Regulating Handling Expenses and Assessments § 948.78 Accounting. (a) If, at the end of a...

  8. 40 CFR 78.2 - General.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false General. 78.2 Section 78.2 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL PROCEDURES § 78.2 General. Part 72 of this chapter, including §§ 72.2 (definitions), 72.3...

  9. 47 CFR 78.111 - Frequency tolerance.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Frequency tolerance. 78.111 Section 78.111... SERVICE Technical Regulations § 78.111 Frequency tolerance. Stations in this service shall maintain the carrier frequency of each authorized transmitter to within the following percentage of the...

  10. 47 CFR 78.111 - Frequency tolerance.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Frequency tolerance. 78.111 Section 78.111... SERVICE Technical Regulations § 78.111 Frequency tolerance. Stations in this service shall maintain the carrier frequency of each authorized transmitter to within the following percentage of the...

  11. 47 CFR 78.111 - Frequency tolerance.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Frequency tolerance. 78.111 Section 78.111... SERVICE Technical Regulations § 78.111 Frequency tolerance. Stations in this service shall maintain the carrier frequency of each authorized transmitter to within the following percentage of the...

  12. 47 CFR 78.111 - Frequency tolerance.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Frequency tolerance. 78.111 Section 78.111... SERVICE Technical Regulations § 78.111 Frequency tolerance. Stations in this service shall maintain the carrier frequency of each authorized transmitter to within the following percentage of the...

  13. 47 CFR 78.111 - Frequency tolerance.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Frequency tolerance. 78.111 Section 78.111... SERVICE Technical Regulations § 78.111 Frequency tolerance. Stations in this service shall maintain the carrier frequency of each authorized transmitter to within the following percentage of the...

  14. 49 CFR 230.78 - Leakage.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 4 2011-10-01 2011-10-01 false Leakage. 230.78 Section 230.78 Transportation... Signal Equipment § 230.78 Leakage. (a) Main reservoirs and related piping. Leakage from main reservoir... to 60 percent of the maximum operating pressure. (b) Brake cylinders. Leakage from brake...

  15. 49 CFR 230.78 - Leakage.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 4 2014-10-01 2014-10-01 false Leakage. 230.78 Section 230.78 Transportation... Signal Equipment § 230.78 Leakage. (a) Main reservoirs and related piping. Leakage from main reservoir... to 60 percent of the maximum operating pressure. (b) Brake cylinders. Leakage from brake...

  16. 49 CFR 230.78 - Leakage.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Leakage. 230.78 Section 230.78 Transportation... Signal Equipment § 230.78 Leakage. (a) Main reservoirs and related piping. Leakage from main reservoir... to 60 percent of the maximum operating pressure. (b) Brake cylinders. Leakage from brake...

  17. 49 CFR 230.78 - Leakage.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 4 2012-10-01 2012-10-01 false Leakage. 230.78 Section 230.78 Transportation... Signal Equipment § 230.78 Leakage. (a) Main reservoirs and related piping. Leakage from main reservoir... to 60 percent of the maximum operating pressure. (b) Brake cylinders. Leakage from brake...

  18. 49 CFR 230.78 - Leakage.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 4 2013-10-01 2013-10-01 false Leakage. 230.78 Section 230.78 Transportation... Signal Equipment § 230.78 Leakage. (a) Main reservoirs and related piping. Leakage from main reservoir... to 60 percent of the maximum operating pressure. (b) Brake cylinders. Leakage from brake...

  19. 47 CFR Alphabetical Index - Part 78

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Part 78 Index Alphabetical Index Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE Technical Regulations Modulation limits. Pt. 78, Index Alphabetical Index—Part 78 A...

  20. 47 CFR Alphabetical Index - Part 78

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Part 78 Index Alphabetical Index Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE Technical Regulations Modulation limits. Pt. 78, Index Alphabetical Index—Part 78 A...

  1. 47 CFR Alphabetical Index - Part 78

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Part 78 Index Alphabetical Index Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE Technical Regulations Modulation limits. Pt. 78, Index Alphabetical Index—Part 78 A...

  2. 47 CFR 78.101 - Power limitations.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Power limitations. 78.101 Section 78.101... SERVICE Technical Regulations § 78.101 Power limitations. (a) On any authorized frequency, the average power delivered to an antenna shall be the minimum amount of power necessary to carry out...

  3. 47 CFR 78.101 - Power limitations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Power limitations. 78.101 Section 78.101... SERVICE Technical Regulations § 78.101 Power limitations. (a) On any authorized frequency, the average power delivered to an antenna shall be the minimum amount of power necessary to carry out...

  4. 47 CFR 78.101 - Power limitations.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Power limitations. 78.101 Section 78.101... SERVICE Technical Regulations § 78.101 Power limitations. (a) On any authorized frequency, the average power delivered to an antenna shall be the minimum amount of power necessary to carry out...

  5. 78 FR 44893 - Connect America Fund

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-25

    ... information collection associated with the Commission's Universal Service--Connect America Fund, Report and Order, 78 FR 32991, June 3, 2013 and Report and Order, 78 FR 38227, June 26, 2013 (Orders). The... the Paperwork Reduction Act (PRA) of 1995 (44 U.S.C. 3501- 3520), 78 FR 34097, June 6, 2013,...

  6. 7 CFR 948.78 - Accounting.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 8 2011-01-01 2011-01-01 false Accounting. 948.78 Section 948.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... Order Regulating Handling Expenses and Assessments § 948.78 Accounting. (a) If, at the end of a...

  7. 78 FR 65173 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-31

    ... Register on July 1, 2013 (78 FR 39190). The NPRM proposed to correct an unsafe condition for the specified... this AD. We considered the comment received. The commenter, Jeremy Schreck, supported the NPRM (78 FR... proposed in the NPRM (78 FR 39190, July 1, 2013) for correcting the unsafe condition; and Do not add...

  8. 7 CFR 948.78 - Accounting.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Accounting. 948.78 Section 948.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... Order Regulating Handling Expenses and Assessments § 948.78 Accounting. (a) If, at the end of a...

  9. 46 CFR 78.65-1 - Officers.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Officers. 78.65-1 Section 78.65-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Exhibition of Merchant Mariner Credential § 78.65-1 Officers. All officers on a vessel must have their licenses or officer...

  10. 22 CFR 92.78 - Translating documents.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 22 Foreign Relations 1 2014-04-01 2014-04-01 false Translating documents. 92.78 Section 92.78 Foreign Relations DEPARTMENT OF STATE LEGAL AND RELATED SERVICES NOTARIAL AND RELATED SERVICES Copying, Recording, Translating and Procuring Documents § 92.78 Translating documents. Officers of the...

  11. 22 CFR 92.78 - Translating documents.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Translating documents. 92.78 Section 92.78 Foreign Relations DEPARTMENT OF STATE LEGAL AND RELATED SERVICES NOTARIAL AND RELATED SERVICES Copying, Recording, Translating and Procuring Documents § 92.78 Translating documents. Officers of the...

  12. 22 CFR 92.78 - Translating documents.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 22 Foreign Relations 1 2013-04-01 2013-04-01 false Translating documents. 92.78 Section 92.78 Foreign Relations DEPARTMENT OF STATE LEGAL AND RELATED SERVICES NOTARIAL AND RELATED SERVICES Copying, Recording, Translating and Procuring Documents § 92.78 Translating documents. Officers of the...

  13. 22 CFR 92.78 - Translating documents.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 22 Foreign Relations 1 2012-04-01 2012-04-01 false Translating documents. 92.78 Section 92.78 Foreign Relations DEPARTMENT OF STATE LEGAL AND RELATED SERVICES NOTARIAL AND RELATED SERVICES Copying, Recording, Translating and Procuring Documents § 92.78 Translating documents. Officers of the...

  14. 22 CFR 92.78 - Translating documents.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 22 Foreign Relations 1 2011-04-01 2011-04-01 false Translating documents. 92.78 Section 92.78 Foreign Relations DEPARTMENT OF STATE LEGAL AND RELATED SERVICES NOTARIAL AND RELATED SERVICES Copying, Recording, Translating and Procuring Documents § 92.78 Translating documents. Officers of the...

  15. 46 CFR 78.36-1 - Application.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 3 2011-10-01 2011-10-01 false Application. 78.36-1 Section 78.36-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Work Vests § 78.36-1 Application. (a) Provisions of this subpart shall apply to all vessels inspected and certificated...

  16. STS-78 Mission Insignia

    NASA Technical Reports Server (NTRS)

    1996-01-01

    The STS-78 patch links past with present to tell the story of its mission and science through a design imbued with the strength and vitality of the 2-dimensional art of North America's northwest coast Indians. Central to the design is the space Shuttle whose bold lines and curves evoke the Indian image for the eagle, a native American symbol of power and prestige as well as the national symbol of the United States. The wings of the Shuttle suggest the wings of the eagle whose feathers, indicative of peace and friendship in Indian tradition, are captured by the U forms, a characteristic feature of Northwest coast Indian art. The nose of the Shuttle is the strong downward curve of the eagle's beak, and the Shuttle's forward windows, the eagle's eyes, represented through the tapered S forms again typical of this Indian art form. The basic black and red atoms orbiting the mission number recall the original NASA emblem while beneath, utilizing Indian ovoid forms, the major mission scientific experiment package LMS (Life and Materials Sciences) housed in the Shuttle's cargo bay is depicted in a manner reminiscent of totem-pole art. This image of a bird poised for flight, so common to Indian art, is counterpointed by an equally familiar Tsimshian Indian symbol, a pulsating sun with long hyperbolic rays, the symbol of life. Within each of these rays are now encased crystals, the products of this mission's 3 major, high-temperature materials processing furnaces. And as the sky in Indian lore is a lovely open country, home of the Sun Chief and accessible to travelers through a hole in the western horizon, so too, space is a vast and beckoning landscape for explorers launched beyond the horizon. Beneath the Tsimshian sun, the colors of the earth limb are appropriately enclosed by a red border representing life to the Northwest coast Indians. The Indian colors of red, navy blue, white, and black pervade the STS-78 path. To the right of the Shuttle-eagle, the constellation

  17. 78 FR 32295 - Commission Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-29

    ... notice for such hearing, which was published in 78 FR 24785, April 26, 2013. Please note that the... From the Federal Register Online via the Government Publishing Office SUSQUEHANNA RIVER BASIN COMMISSION Commission Meeting AGENCY: Susquehanna River Basin Commission. ACTION: Notice. SUMMARY:...

  18. 78 FR 12412 - Commission Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-22

    ... Commission on February 14, 2013, and identified in the notice for such hearing, which was published in 78 FR... From the Federal Register Online via the Government Publishing Office ] SUSQUEHANNA RIVER BASIN COMMISSION Commission Meeting AGENCY: Susquehanna River Basin Commission. ACTION: Notice. SUMMARY:...

  19. President's Report, 1976-78.

    ERIC Educational Resources Information Center

    Knight, Brent

    After stating the goals of the new president of Triton College (Illinois) for his first two years of office (1976-78), this annual report focuses upon the activities, achievements, and management concerns of the college for this period. These issues are discussed in terms of the process of developing and implementing appropriate strategies to deal…

  20. 78 FR 8195 - Biweekly Notice

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-05

    ..., 2013. The last biweekly notice was published on January 22, 2013 (78 FR 4469). ADDRESSES: You may... NRC E-Filing rule (72 FR 49139; August 28, 2007). The E-Filing process requires participants to submit... submission form. In order to serve documents through the Electronic Information Exchange System, users...

  1. 78 FR 58559 - United States

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-24

    ... the proposed Final Judgment and CIS in the Federal Register on May 22, 2013, see 78 FR 30399-30660... determine not whether a particular decree is the one that will best serve society, but whether the...; Food & Water Watch, a non-profit consumer advocacy organization; and Alcohol Justice, a...

  2. 78 FR 17431 - Antitrust Division

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-21

    ... January 2, 2013 (78 FR 117). Patricia A. Brink, Director of Civil Enforcement, Antitrust Division. BILLING...) of the Act on July 30, 2001 (66 FR 39336). The last notification was filed with the Department on... Antitrust Division Notice Pursuant to the National Cooperative Research and Production Act of...

  3. 78 FR 44307 - Semiannual Agenda

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-23

    ... July 23, 2013 Part XIV Department of the Treasury Semiannual Regulatory Agenda #0;#0;Federal Register / Vol. 78 , No. 141 / Tuesday, July 23, 2013 / Unified Agenda#0;#0; ] DEPARTMENT OF THE TREASURY 31 CFR Subtitles A and B Semiannual Agenda AGENCY: Department of the Treasury. ACTION: Semiannual regulatory...

  4. 78 FR 73083 - Compassionate Release

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-05

    ... an interim rule making a technical change to the regulations on February 28, 2013 (78 FR 13478). We... the final decision is subject to the general supervision and direction of the Attorney General and... Management System (FDMS) will accept comments until Midnight Eastern Time at the end of that day....

  5. 78 FR 56922 - Endangered Species; Issuance of Permits

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-16

    ............ 78 FR 25296; April June 17, 2013. 30, 2013. 673458 Sedgwick County Zoo.. 78 FR 25296; April June 26.... Park. 2013. 04821B Atlanta Fulton County 78 FR 27253; May 9, June 26, 2013. Zoo, Inc. 2013. 04821B Atlanta Fulton County 78 FR 27253; May 9, August 22, 2013. Zoo, Inc. 2013. 05176B Yang Li 78 FR 30325;...

  6. Polymorphism of new rubidium magnesium monophosphate

    SciTech Connect

    Ait Benhamou, Rajia; Wallez, Gilles; Loiseau, Pascal; Viana, Bruno; Elaatmani, Mohamed; Daoud, Mohamed; Zegzouti, Abdelwahed

    2010-09-15

    Novel phase RbMgPO{sub 4}, synthesized by solid state reaction, sustains phase transitions at 169 and 184 {sup o}C. The medium ({beta})- and high- ({gamma}) temperature forms (orthorhombic, respectively Pna2{sub 1} and Pnma, Z=4) are typical stuffed tridymites but the ambient form ({alpha}) exhibits an unusual three-fold Pna2{sub 1} superstructure that results from the change of coordination of one third of the Mg atoms. Cell parameters are as follows: for {alpha}: a=26.535(1) A, b=9.2926(3) A, c=5.3368(2) A; for {beta}: a=8.7938(3) A, b=9.3698(3) A, c=5.3956(1) A; for {gamma}: a=8.7907(3) A, b=5.4059(1) A, c=9.3949(3) A. - Graphical abstract: Superstructure h k l, h{ne}3n diffraction peaks of low-temperature RbMgPO{sub 4} results of the transformation of 1/3 of the MgO{sub 4} tetrahedra into MgO{sub 5} pyramids.

  7. Polarization spectroscopy in rubidium and cesium

    SciTech Connect

    Harris, M. L.; Adams, C. S.; Cornish, S. L.; McLeod, I. C.; Tarleton, E.; Hughes, I. G.

    2006-06-15

    We develop a theoretical treatment of polarization spectroscopy and use it to make predictions about the general form of polarization spectra in the alkali-metal atoms. Using our model, we generate theoretical spectra for the D2 transitions in {sup 87}Rb, {sup 85}Rb, and {sup 133}Cs. Experiments demonstrate that the model accurately reproduces spectra of transitions from the upper hyperfine level of the ground state only. Among these, the closed transition F{yields}F{sup '}=F+1 dominates, with a steep gradient through line center ideally suited for use as a reference in laser locking.

  8. 46 CFR 78.16-1 - General.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 3 2011-10-01 2011-10-01 false General. 78.16-1 Section 78.16-1 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Port Lights § 78.16-1 General. If port lights are fitted in spaces used alternatively for the carriage of cargo or passengers as permitted by § 171.116(d) of this chapter,...

  9. 78 FR 25666 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-02

    ... proposed AD. Discussion On December 27, 2012, we issued AD 2012-26-51, Amendment 39-17312 (78 FR 1723... A318, A319, A320, and A321 series airplanes. Since we issued AD 2012-26-51, Amendment 39-17312 (78 FR... [which corresponds to FAA AD 2012-26-51, Amendment 39-17312 (78 FR 1723, January 9, 2013)] to...

  10. OARE STS-78 (LMS-1) Final Report

    NASA Technical Reports Server (NTRS)

    Rice, James E.

    1996-01-01

    The report is organized into sections representing the phases of work performed in analyzing the STS-78 (LMS-1) results. Section 1 briefly outlines the Orbital Acceleration Research Experiment (OARE) system features, coordinates, and measurement parameters. Section 2 describes the results from STS-78. The mission description, data calibration, and representative data obtained on STS-78 are presented. Also, the anomalous performance of OARE on STS-78 is discussed. Finally, Section 3 presents a discussion of accuracy achieved and achievable with OARE. Appendix A discusses the data processing methodology in detail.

  11. 78 FR 71558 - Insurance Cost Information Regulation

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-29

    ... April 11, 2000 (65 FR 19477-78). For access to the docket to read background documents or comments... their prospective purchasers.\\4\\ \\4\\ 58 FR 12545. B. Public Law 112-252 Public Law 112-252, passed by... April 11, 2000 (65 FR 19477-78) or you may visit http://www.dot.gov/privacy.html . Authority: 49...

  12. 78 FR 59798 - Small Business Subcontracting: Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-30

    ... final regulations [FR Doc. 2013-169671, which were published in the Federal Register on Tuesday, July 16, 2013 (78 FR 42391). The document amended SBA's regulations governing small business subcontracting to...: Background On July 16, 2013, at 78 FR 42392 (available at...

  13. 29 CFR 1919.78 - Nondestructive examinations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 7 2010-07-01 2010-07-01 false Nondestructive examinations. 1919.78 Section 1919.78 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) GEAR CERTIFICATION Certification of Shore-Based Material Handling Devices §...

  14. 78 FR 35781 - North Dakota Regulatory Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-14

    ... proposed rule published January 29, 2013 (78 FR 6062), is reopened. We will accept written comments on this... the December 15, 1980 Federal Register (45 FR 82214). You can also find later actions concerning North... proposed amendment in the January 29, 2013 Federal Register (78 FR 6062; Administrative Record No....

  15. 78 FR 60707 - Glyphosate; Pesticide Tolerances

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ... April 20, 2011 (76 FR 22067) (FRL-8869- 7), EPA issued a document pursuant to FFDCA section 408(d)(3... with glyphosate follows. In the Federal Register of May 1, 2013 (78 FR 25396) (FRL-9384-3), EPA issued... Register of May 1, 2013 (78 FR 25396), EPA concludes that there is a reasonable certainty that no harm...

  16. 78 FR 66649 - Spirotetramat; Pesticide Tolerances

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-06

    ... Register of July 17, 2013 (78 FR 42736) (FRL-9391- 6), the EPA proposed, on its own initiative under FFDCA... the Federal Register of May 15, 2013 (78 FR 28507) (FRL- 9382-8); in the risk assessments associated... Review'' (58 FR 51735, October 4, 1993). Because this final rule has been exempted from review...

  17. 78 FR 42693 - Hexythiazox; Pesticide Tolerances

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-17

    .... Summary of Petitioned-For Tolerance In the Federal Register of September 28, 2012 (77 FR 59578) (FRL- 9364-6), January 16, 2013 (78 FR 3377) (FRL-9375-4), and August 22, 2012 (77 FR 50661) (FRL-9358-9), EPA... Federal Register of February 8, 2013 (78 FR 9322) (FRL-9376-9). C. Exposure Assessment 1. Dietary...

  18. 78 FR 62616 - Integrated System Power Rates

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-22

    ..., Southwestern published notice in the Federal Register (78 FR 39280) of a 60-day comment period, together with a..., 2013, (78 FR 39280). The consultation and comment period was shortened from the 90 days provided for in... Southwestern Power Administration Integrated System Power Rates AGENCY: Southwestern Power Administration,...

  19. 44 CFR 78.3 - Responsibilities.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 44 Emergency Management and Assistance 1 2013-10-01 2013-10-01 false Responsibilities. 78.3... ASSISTANCE § 78.3 Responsibilities. (a) Federal. The Administrator will allocate available funds to each FEMA... approval; and (5) Submit performance and financial reports to FEMA in compliance with 44 CFR 13.40 and...

  20. 78 FR 52579 - SHINE Medical Technologies, Inc.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-23

    ... application was previously published in the Federal Register on May 20, 2013 (78 FR 29390). The first part of... The NRC staff published in the Federal Register on July 1, 2013 (78 FR 39342), its determination that... COMMISSION SHINE Medical Technologies, Inc. AGENCY: Nuclear Regulatory Commission. ACTION: Notice of...

  1. 78 FR 49248 - Passenger Vessels Accessibility Guidelines

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-13

    ... additional time to submit comments. DATES: For the proposed rule published June 25, 2013 (78 FR 38102... passengers with disabilities. See 78 FR 38102, June 25, 2013. In that notice, the Access Board requested... TRANSPORTATION BARRIERS COMPLIANCE BOARD 36 CFR Part 1196 RIN 3014-AA11 Passenger Vessels...

  2. 78 FR 53237 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-29

    ... information; replacing certain O-rings; and checking part number and replacing certain O-ring seals if needed... for AD 2013-05-08, Amendment 39-17380 (78 FR 27015, May 9, 2013), remains June 13, 2013. ADDRESSES... Directive (AD) 2013-05-08, Amendment 39-17380 (78 FR 27015, May 9, 2013), currently requires, depending...

  3. 78 FR 37474 - Commercial Radio Operators

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-21

    ... published at 78 FR 23150, April 18, 2013 became effective June 7, 2013. FOR FURTHER INFORMATION CONTACT... the Commission's Report and Order, FCC 13-4, published at 78 FR 23150, April 18, 2013. The OMB Control... and the records must be made available to the FCC upon request. The records are journal...

  4. 9 CFR 78.30 - General restrictions.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 9 Animals and Animal Products 1 2012-01-01 2012-01-01 false General restrictions. 78.30 Section 78.30 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions...

  5. 9 CFR 78.30 - General restrictions.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 9 Animals and Animal Products 1 2013-01-01 2013-01-01 false General restrictions. 78.30 Section 78.30 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions...

  6. 9 CFR 78.30 - General restrictions.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 9 Animals and Animal Products 1 2014-01-01 2014-01-01 false General restrictions. 78.30 Section 78.30 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions...

  7. 9 CFR 78.30 - General restrictions.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 9 Animals and Animal Products 1 2011-01-01 2011-01-01 false General restrictions. 78.30 Section 78.30 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions...

  8. 78 FR 57790 - Extension of Time Limits

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-20

    ... Regulation Regarding the Extension of Time Limits, 78 FR 3367 (January 16, 2013) (Proposed Rule). The... Information and Time Limits for Submission of Factual Information, 78 FR 21246 (April 10, 2013). As to the... International Trade Administration 19 CFR Part 351 RIN 0625-AA94 Extension of Time Limits AGENCY:...

  9. 40 CFR 600.105-78 - Recordkeeping.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 29 2010-07-01 2010-07-01 false Recordkeeping. 600.105-78 Section 600.105-78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) ENERGY POLICY FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy Regulations for 1978 and...

  10. 40 CFR 600.103-78 - Abbreviations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 29 2010-07-01 2010-07-01 false Abbreviations. 600.103-78 Section 600.103-78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) ENERGY POLICY FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy Regulations for 1978 and...

  11. 40 CFR 600.102-78 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 29 2010-07-01 2010-07-01 false Definitions. 600.102-78 Section 600.102-78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) ENERGY POLICY FUEL ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy Regulations for 1978 and...

  12. 78 FR 62627 - Sam Rayburn Dam Rate

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-22

    ... proposed rate schedule. On August 6, 2013, Southwestern published notice in the Federal Register, (78 FR... Secretary of Energy for the period October 1, 2012 through September 30, 2013 (77 FR 67813, November 14... proposed Rayburn power rate were announced by a Federal Register notice published on August 6, 2013 (78...

  13. 78 FR 48703 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-09

    ... provides corrections to that table, to be used in lieu of the information published at 78 FR 14581-14583.../factsheets/2010/srp_fs.pdf . In the proposed flood hazard determination notice published at 78 FR 14581-14583... should be used in lieu of that previously published. Correction In Proposed rule FR Doc....

  14. 40 CFR 86.437-78 - Certification.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 19 2013-07-01 2013-07-01 false Certification. 86.437-78 Section 86.437-78 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE HIGHWAY VEHICLES AND ENGINES Emission Regulations for 1978...

  15. 38 CFR 4.78 - Muscle function.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2011-07-01 2011-07-01 false Muscle function. 4.78... DISABILITIES Disability Ratings The Organs of Special Sense § 4.78 Muscle function. (a) Examination of muscle...) Evaluation of muscle function. (1) An evaluation for diplopia will be assigned to only one eye. When...

  16. 38 CFR 4.78 - Muscle function.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2012-07-01 2012-07-01 false Muscle function. 4.78... DISABILITIES Disability Ratings The Organs of Special Sense § 4.78 Muscle function. (a) Examination of muscle...) Evaluation of muscle function. (1) An evaluation for diplopia will be assigned to only one eye. When...

  17. 38 CFR 4.78 - Muscle function.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Muscle function. 4.78... DISABILITIES Disability Ratings The Organs of Special Sense § 4.78 Muscle function. (a) Examination of muscle...) Evaluation of muscle function. (1) An evaluation for diplopia will be assigned to only one eye. When...

  18. 38 CFR 4.78 - Muscle function.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2014-07-01 2014-07-01 false Muscle function. 4.78... DISABILITIES Disability Ratings The Organs of Special Sense § 4.78 Muscle function. (a) Examination of muscle...) Evaluation of muscle function. (1) An evaluation for diplopia will be assigned to only one eye. When...

  19. 38 CFR 4.78 - Muscle function.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2013-07-01 2013-07-01 false Muscle function. 4.78... DISABILITIES Disability Ratings The Organs of Special Sense § 4.78 Muscle function. (a) Examination of muscle...) Evaluation of muscle function. (1) An evaluation for diplopia will be assigned to only one eye. When...

  20. 78 FR 70238 - Survey of Urban Rates

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-25

    ... requirements contained in the Commission's Order, DA 13-598, published at 78 FR 29063, May 17, 2013. The OMB... No. 10-90; DA 13-598, 78 FR 29063, Connect America Fund. The Order adopts the form and content for a... implementing various reforms adopted as part of the USF/ICC Transformation Order, 76 FR 73830, November...

  1. 78 FR 52956 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-27

    ... Register (78 FR 36220-36222) a proposed flood hazard determination notice that contained an erroneous table... FR 36220. The table provided here represents the proposed flood hazard determinations and communities... . In the proposed flood hazard determination notice published at 78 FR 36220 in the June 17,...

  2. 78 FR 70881 - Connect America Fund

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-27

    .... Introduction 1. In the USF/ICC Transformation Order, 78 FR 38227, June 26, 2013, the Federal Communications... bidding and a new forward- looking model of the cost of constructing modern multi-purpose networks.'' In... Obligations Public Notice, 78 FR 16456, March 15, 2013, an urban area is defined as any ``urban area''...

  3. 31 CFR 306.78 - Nontransferable securities.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 31 Money and Finance:Treasury 2 2011-07-01 2011-07-01 false Nontransferable securities. 306.78.... SECURITIES Assignments by or in Behalf of Trustees and Similar Fiduciaries § 306.78 Nontransferable securities. The provisions of this subpart, so far as applicable, govern assignments of Treasury...

  4. 24 CFR 200.78 - Energy conservation.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 2 2012-04-01 2012-04-01 false Energy conservation. 200.78 Section... Eligibility Requirements for Existing Projects Property Requirements § 200.78 Energy conservation. Construction, mechanical equipment, and energy and metering selections shall provide cost effective...

  5. 24 CFR 200.78 - Energy conservation.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 24 Housing and Urban Development 2 2011-04-01 2011-04-01 false Energy conservation. 200.78 Section... Eligibility Requirements for Existing Projects Property Requirements § 200.78 Energy conservation. Construction, mechanical equipment, and energy and metering selections shall provide cost effective...

  6. 24 CFR 200.78 - Energy conservation.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 24 Housing and Urban Development 2 2010-04-01 2010-04-01 false Energy conservation. 200.78 Section... Eligibility Requirements for Existing Projects Property Requirements § 200.78 Energy conservation. Construction, mechanical equipment, and energy and metering selections shall provide cost effective...

  7. 24 CFR 200.78 - Energy conservation.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 24 Housing and Urban Development 2 2013-04-01 2013-04-01 false Energy conservation. 200.78 Section... Eligibility Requirements for Existing Projects Property Requirements § 200.78 Energy conservation. Construction, mechanical equipment, and energy and metering selections shall provide cost effective...

  8. 24 CFR 200.78 - Energy conservation.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 2 2014-04-01 2014-04-01 false Energy conservation. 200.78 Section... Eligibility Requirements for Existing Projects Property Requirements § 200.78 Energy conservation. Construction, mechanical equipment, and energy and metering selections shall provide cost effective...

  9. 78 FR 57927 - Credit Risk Retention

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-20

    ... proposal, as described in more detail below. \\5\\ Credit Risk Retention; Proposed Rule, 76 FR 24090 (April... legislation.''). \\24\\ See 78 FR 6408 (January 30, 2013), as amended by 78 FR 35430 (June 12, 2013). These two... Federal Register. See 76 FR 27390 (May 11, 2011). The Board had initial responsibility for...

  10. 78 FR 19136 - Emergency Relief Program

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-29

    ..., 2000 (65 FR 19477). Docket: For access to the docket to read background documents and comments received... first $2 billion (78 FR 8691). In accordance with the statute, the remainder of the appropriated funds... Register notice of availability of emergency relief funds for Hurricane Sandy (78 FR 8691, Feb. 6,...

  11. 46 CFR 78.30-15 - Watchmen.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 3 2014-10-01 2014-10-01 false Watchmen. 78.30-15 Section 78.30-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Lookouts, Pilothouse Watch... duties while on watch. (d) The uniform of the night watchman shall be conspicuously different from...

  12. 46 CFR 78.30-15 - Watchmen.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 3 2011-10-01 2011-10-01 false Watchmen. 78.30-15 Section 78.30-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Lookouts, Pilothouse Watch... duties while on watch. (d) The uniform of the night watchman shall be conspicuously different from...

  13. 46 CFR 78.30-15 - Watchmen.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 3 2013-10-01 2013-10-01 false Watchmen. 78.30-15 Section 78.30-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Lookouts, Pilothouse Watch... duties while on watch. (d) The uniform of the night watchman shall be conspicuously different from...

  14. 46 CFR 78.30-15 - Watchmen.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 3 2012-10-01 2012-10-01 false Watchmen. 78.30-15 Section 78.30-15 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Lookouts, Pilothouse Watch... duties while on watch. (d) The uniform of the night watchman shall be conspicuously different from...

  15. 78 FR 48657 - Procurement List; Additions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-09

    ... INFORMATION: Additions On 6/14/2013 (78 FR 35874-35875) and 6/21/2013 (78 FR 37524-37525), the Committee for... Jackets, Legal, Manila, Straight Tab Cut, 1'' Expansion NSN: 7530-00-NIB-1083--File Jackets, Legal,...

  16. 78 FR 67309 - Earth Stations Aboard Aircraft

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-12

    ...), and (d) published at 78 FR 14920 on March 8, 2013, are effective on November 12, 2013. FOR FURTHER...-161, published at 78 FR 14920, March 8, 2013. The OMB Control Number is 3060-1187. The Commission... COMMISSION 47 CFR Part 25 Earth Stations Aboard Aircraft AGENCY: Federal Communications Commission....

  17. 78 FR 11632 - Sunshine Act Meeting Notice

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-19

    ... SAFETY BOARD Sunshine Act Meeting Notice Federal Register CITATION OF PREVIOUS ANNOUCEMENT: 78 FR 4393... January 22, 2013, (78 FR 4393), concerning a two-session public meeting and hearing on March 14, 2013, at... 6:30 p.m. instead of 7:00 p.m.; (3) the topic of safety culture at the Pantex Plant in Session...

  18. 78 FR 53635 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-30

    ... to the specified products. The NPRM published in the Federal Register on May 21, 2013 (78 FR 29666.... We received no comments on the NPRM (78 FR 29666, May 21, 2013) or on the determination of the cost.... Is not a ``significant rule'' under the DOT Regulatory Policies and Procedures (44 FR 11034,...

  19. 78 FR 65187 - Airworthiness Directives; Airbus Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-31

    ... products. The NPRM published in the Federal Register on August 1, 2013 (78 FR 46543). The NPRM proposed to... required by FAA AD 2005-07-04, Amendment 39-14028 (70 FR 16104, March 30, 2005)]. This condition, if not... on the NPRM (78 FR 46543, August 1, 2013) or on the determination of the cost to the...

  20. 78 FR 78769 - Medical Body Area Networks

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-27

    ...), 95.1217(a)(3), 95.1223 and 95.1225 published at 78 FR 55715, September 11, 2012 are effective... First Report and Order, FCC 12-54, published at 78 FR 55715, September 11, 2012. The OMB Control Number... COMMISSION 47 CFR Part 95 Medical Body Area Networks AGENCY: Federal Communications Commission. ACTION:...

  1. 36 CFR 78.2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 36 Parks, Forests, and Public Property 1 2010-07-01 2010-07-01 false Definitions. 78.2 Section 78... Definitions. Federal Agency Head means the highest administrative official of a Federal agency, or designee. Imminent Threat to the National Security means the imminence of any natural, technological, or...

  2. 36 CFR 78.2 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 36 Parks, Forests, and Public Property 1 2011-07-01 2011-07-01 false Definitions. 78.2 Section 78.2 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR WAIVER OF..., snowstorm, fire, explosion, or other catastrophe, in any part of the United States which, in...

  3. 40 CFR 78.11 - Intervenors.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false Intervenors. 78.11 Section 78.11 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL... to intervene may be granted only for good cause shown. (b) The Environmental Appeals Board...

  4. 40 CFR 78.19 - Interlocutory appeal.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false Interlocutory appeal. 78.19 Section 78.19 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED... those orders or rulings to the Environmental Appeals Board for interlocutory appeal on the record....

  5. 40 CFR 78.19 - Interlocutory appeal.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 17 2013-07-01 2013-07-01 false Interlocutory appeal. 78.19 Section 78.19 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED... those orders or rulings to the Environmental Appeals Board for interlocutory appeal on the record....

  6. 40 CFR 78.18 - Proposed decision.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false Proposed decision. 78.18 Section 78.18 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL... decision on the factual, policy, and legal issues referred by the Environmental Appeals Board for...

  7. 40 CFR 78.4 - Filings.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 16 2010-07-01 2010-07-01 false Filings. 78.4 Section 78.4 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL PROCEDURES... such materials by reference shall provide copies of the materials as instructed by the...

  8. 40 CFR 78.18 - Proposed decision.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 17 2013-07-01 2013-07-01 false Proposed decision. 78.18 Section 78.18 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) APPEAL... decision on the factual, policy, and legal issues referred by the Environmental Appeals Board for...

  9. 78 FR 56811 - Practices and Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-16

    ... rule amending 5 CFR parts 1201 and 1209. 78 FR 39543. The interim final rule was necessary to conform... amending 5 CFR parts 1201 and 1209, which was published at 78 FR 39543, on July 2, 2013, is adopted as a... or local officer or employee violated restrictions on partisan political activity. DATES:...

  10. 78 FR 29062 - Signal Booster Rules

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-17

    ... 78 FR 21555, April 11, 2013 regarding certain FCC rules governing radiofrequency radiation exposure... FR 21555, April 11, 2013, a document in the Signal Boosters proceeding, WT Docket No. 10-4, which... Register of 78 FR 21555, April 11, 2013. This document does not change any of the other rule amendments...

  11. 42 CFR 460.78 - Dietary services.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 42 Public Health 4 2013-10-01 2013-10-01 false Dietary services. 460.78 Section 460.78 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) PROGRAMS OF ALL-INCLUSIVE CARE FOR THE ELDERLY (PACE) PROGRAMS OF ALL-INCLUSIVE CARE FOR THE ELDERLY...

  12. 78 FR 25858 - National Practitioner Data Bank

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-03

    ...) 443-2300. SUPPLEMENTARY INFORMATION: I. Background In FR Doc. No. 2013-07521 of April 5, 2013 (78 FR... requirements. IV. Correction of Errors In FR Doc. No. 2013-07521 published April 5, 2013 (78 FR 20473), make... HUMAN SERVICES 45 CFR Parts 60 and 61 RIN 0906-AA87 National Practitioner Data Bank AGENCY:...

  13. 78 FR 11735 - Semiannual Regulatory Agenda; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-19

    ... FURTHER INFORMATION CONTACT: Mariana A. Pardo, Director, Government Contracting and Business Development... From the Federal Register Online via the Government Publishing Office ] Vol. 78 Tuesday, No. 33... 8, 2013 (78 FR 1636). The regulatory agenda is a semiannual summary of all current and...

  14. 78 FR 43753 - Practices and Procedures

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-22

    ... INFORMATION: On April 11, 2013, the Board published an interim final rule amending 5 CFR 1201.21(c). 78 FR... Without Change 0 Accordingly, the interim rule amending 5 CFR 1201.21(c), which was published at 78 FR... requirement that agencies provide a copy of the MSPB appeal form when the agency issues a decision notice...

  15. 31 CFR 306.78 - Nontransferable securities.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Nontransferable securities. 306.78.... SECURITIES Assignments by or in Behalf of Trustees and Similar Fiduciaries § 306.78 Nontransferable securities. The provisions of this subpart, so far as applicable, govern assignments of Treasury...

  16. 78 FR 48848 - Private Attorney Involvement

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-12

    ... Workshops (Workshops), as noticed at 78 FR 27339 (May 10, 2013), and is requesting public comments on... Federal Register at 78 FR 27339 (May 10, 2013) regarding the Workshops and seeking comments on the... Task Force (PBTF) Report, available at: http://bit.ly/LSCPBTF-Report . Part 1614 is designed to...

  17. 78 FR 27452 - Credit Ratings Roundtable

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-05-10

    ... Ratings Roundtable that was published in the April 29, 2013 Federal Register (78 FR 25101 through 25102). The new location of the roundtable discussion is Room L-002 (the Auditorium) at the Securities and... notice in the Federal Register (78 FR 25101 through 25102) that announced a May 14, 2013 roundtable...

  18. 78 FR 49120 - Courts of Indian Offenses

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-13

    ... with a request for comment at 78 FR 14017. We stated in the interim final rule that we would review any... the interim final rule. Therefore, the interim rule published March 3, 2013, at 78 FR 14017, is... Bureau of Indian Affairs 25 CFR Part 11 RIN 1076-AF16 Courts of Indian Offenses AGENCY: Bureau of...

  19. 78 FR 77106 - Procurement List; Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-20

    ... INFORMATION: Deletions On 11/8/2013 (78 FR 67129-67130) and 11/15/2013 (78 FR 68823- 68824), the Committee for... Building and Courthouse, 205 4th Street, Coeur d'Alene, ID, U.S. Federal Building, St. Maries, ID NPA: TESH, Inc., Coeur d'Alene, ID Contracting Activity: GENERAL SERVICES ADMINISTRATION, FPDS AGENCY...

  20. 31 CFR 306.78 - Nontransferable securities.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 31 Money and Finance:Treasury 2 2013-07-01 2013-07-01 false Nontransferable securities. 306.78.... SECURITIES Assignments by or in Behalf of Trustees and Similar Fiduciaries § 306.78 Nontransferable securities. The provisions of this subpart, so far as applicable, govern assignments of Treasury...

  1. 31 CFR 306.78 - Nontransferable securities.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 31 Money and Finance:Treasury 2 2012-07-01 2012-07-01 false Nontransferable securities. 306.78.... SECURITIES Assignments by or in Behalf of Trustees and Similar Fiduciaries § 306.78 Nontransferable securities. The provisions of this subpart, so far as applicable, govern assignments of Treasury...

  2. 78 FR 73112 - Boundary Expansion of Thunder Bay National Marine Sanctuary

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-05

    ... published June 14, 2013 (78 FR 35776), extended August 15, 2013 (78 FR 49700) and October 28, 2013 (78 FR... (78 FR 35776). An accompanying draft environmental impact statement (DEIS) was also published (78 FR... October 18, 2013 (78 FR 49700) then until November 27, 2013 (78 FR 64186) to gather more information...

  3. 7 CFR 1033.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1033.78 Section 1033.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Handling Payments for Milk § 1033.78 Charges on overdue accounts. See § 1000.78. Administrative...

  4. 7 CFR 1124.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1124.78 Section 1124.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Regulating Handling Payments for Milk § 1124.78 Charges on overdue accounts. See § 1000.78....

  5. 7 CFR 1030.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1030.78 Section 1030.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Regulating Handling Payments for Milk § 1030.78 Charges on overdue accounts. See § 1000.78....

  6. 7 CFR 1131.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1131.78 Section 1131.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Handling Payments for Milk § 1131.78 Charges on overdue accounts. See § 1000.78. Administrative...

  7. 7 CFR 1005.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1005.78 Section 1005.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Regulating Handling Payments for Milk § 1005.78 Charges on overdue accounts. See § 1000.78....

  8. 7 CFR 1126.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1126.78 Section 1126.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Handling Payments for Milk § 1126.78 Charges on overdue accounts. See § 1000.78. Administrative...

  9. 7 CFR 1001.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1001.78 Section 1001.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Handling Payments for Milk § 1001.78 Charges on overdue accounts. See § 1000.78. Administrative...

  10. 7 CFR 1032.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1032.78 Section 1032.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Handling Payments for Milk § 1032.78 Charges on overdue accounts. See § 1000.78. Administrative...

  11. 7 CFR 1006.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1006.78 Section 1006.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Handling Payments for Milk § 1006.78 Charges on overdue accounts. See § 1000.78. Administrative...

  12. 7 CFR 1007.78 - Charges on overdue accounts.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 9 2010-01-01 2009-01-01 true Charges on overdue accounts. 1007.78 Section 1007.78 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing... Handling Payments for Milk § 1007.78 Charges on overdue accounts. See § 1000.78. Marketwide...

  13. 78 FR 62648 - Endangered Species; Marine Mammals; Issuance of Permits

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-22

    .... Graham Worthy, 78 FR 30325; May 22, 2013 September 30, 2013. University of Central Florida. 067925 U.S..., New College 78 FR 37563; June 21, September 30, 2013. of Florida. 2013. 19806A Thomas Postel 78 FR.... Applicant Federal Register notice Permit issuance date Endangered Species 10814B Larry Bell 78 FR...

  14. 78 FR 48712 - Endangered Species; Marine Mammals; Issuance of Permits

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-09

    ... 78 FR 9725; February 11, June 14, 2013. the University of 2013. Illinois. 675484 Birmingham Zoo, Inc..... 78 FR 16292; March 14, May 1, 2013. 2013. 036218 Brevard Zoo 78 FR 1771; March 22, May 1, 2013. 2013... 1771; March 22, May 1, 2013. 2013. 678968 Mesker Park Zoo......... 78 FR 1771; March 22, May 1,...

  15. 78 FR 73471 - Refuge Alternatives for Underground Coal Mines

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-06

    ... August 8, 2013 (78 FR 48593), extended September 23, 2013 (78 FR 58264), is further extended. Comments.... SUPPLEMENTARY INFORMATION: On August 8, 2013 (78 FR 48593), MSHA published a Request for Information on Refuge..., 2013. In response to requests, MSHA extended the comment period to December 6, 2013 (78 FR 58264)...

  16. 47 CFR 78.67 - Copies of rules.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 4 2010-10-01 2010-10-01 false Copies of rules. 78.67 Section 78.67... SERVICE General Operating Requirements § 78.67 Copies of rules. The licensee of a CARS station shall have a current copy of this part 78, and, in cases where aeronautical obstruction marking of antennas...

  17. 47 CFR 78.67 - Copies of rules.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 4 2011-10-01 2011-10-01 false Copies of rules. 78.67 Section 78.67 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE General Operating Requirements § 78.67 Copies of rules. The licensee of a CARS station shall have a current copy of this part 78, and,...

  18. 47 CFR 78.67 - Copies of rules.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Copies of rules. 78.67 Section 78.67 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE General Operating Requirements § 78.67 Copies of rules. The licensee of a CARS station shall have a current copy of this part 78, and,...

  19. 47 CFR 78.67 - Copies of rules.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 4 2014-10-01 2014-10-01 false Copies of rules. 78.67 Section 78.67 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE General Operating Requirements § 78.67 Copies of rules. The licensee of a CARS station shall have a current copy of this part 78, and,...

  20. 47 CFR 78.67 - Copies of rules.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 4 2013-10-01 2013-10-01 false Copies of rules. 78.67 Section 78.67 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES CABLE TELEVISION RELAY SERVICE General Operating Requirements § 78.67 Copies of rules. The licensee of a CARS station shall have a current copy of this part 78, and,...

  1. 78 FR 54870 - Procurement List; Additions and Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-06

    ... Vendor, Supply Chain Management Service(inventory control, obsolescence identification, engineering...: Additions On 6/28/2013 (78 FR 38952-38953) and 7/19/2013 (78 FR 43180), the Committee for Purchase From...: Dept of the Navy, NSWC Crane, Crane, IN Deletions On 7/26/2013 (78 FR45183) and 8/2/2013 (78 FR...

  2. 78 FR 61953 - Order Denying Export Privileges

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-08

    ... being that of August 8, 2013 (78 FR 49107 (August 12, 2013)), has continued the Regulations in effect... engaging in transactions relating to exporting amplifiers to China and India without obtaining the...

  3. 78 FR 60249 - Order Denying Export Privileges

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-01

    ... extended by successive Presidential Notices, the most recent being that of August 8, 2013 (78 FR 49107... a defense article, to-wit: a Naval Radar Control Unit AN/SPS-40B/C/D, part number 161664, also...

  4. 9 CFR 78.20 - General restrictions.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions on Interstate Movement of Bison Because of Brucellosis § 78.20 General restrictions. Bison may not be...

  5. 9 CFR 78.5 - General restrictions.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions on Interstate Movement of Cattle Because of Brucellosis § 78.5 General restrictions. Cattle may not be...

  6. 78 FR 71725 - Household Movers' Disclosure Requirements

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-29

    ..., Household Movers' Disclosure Requirements. See 78 FR 18421-01 (Mar. 26, 2013). This collection has been... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF TRANSPORTATION Surface Transportation Board Household Movers' Disclosure Requirements AGENCY: Surface...

  7. 40 CFR 600.103-78 - Abbreviations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy and Carbon-Related Exhaust Emission Regulations for 1978 and Later Model Year Automobiles-Test Procedures § 600.103-78...

  8. 40 CFR 600.102-78 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy and Carbon-Related Exhaust Emission Regulations for 1978 and Later Model Year Automobiles-Test Procedures § 600.102-78...

  9. 40 CFR 600.105-78 - Recordkeeping.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... ECONOMY AND CARBON-RELATED EXHAUST EMISSIONS OF MOTOR VEHICLES Fuel Economy and Carbon-Related Exhaust Emission Regulations for 1978 and Later Model Year Automobiles-Test Procedures § 600.105-78...

  10. 78 FR 69133 - Drug Enforcement Administration

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-18

    ... International, Inc. By Notice dated May 14, 2013, and published in the Federal Register on May 22, 2013, 78 FR...-Methylenedioxymethamphet- amine (MDMA) I (7405). Cocaine (9041) II Oxycodone (9143) II Hydrocodone (9193) II...

  11. 78 FR 69086 - Sunshine Act Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-18

    ...: 78 FR 68444 (November 14, 2013) DATE AND TIME: Tuesday, November 19, 2013 at 10:00 a.m. PLACE: 999 E... premature disclosure of which would be likely to have a considerable adverse effect on the implementation...

  12. 78 FR 40778 - Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-08

    ... Section 215 of the USA PATRIOT Act and Section 702 of Foreign Intelligence Surveillance Act. DATES: July 9... Participation See also Federal Register at 78 FR 39021, published on June 28, 2013, for more information...

  13. 9 CFR 78.25 - Other movements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Interstate Movement of Bison Because of Brucellosis § 78.25 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of bison not otherwise provided for in...

  14. 9 CFR 78.25 - Other movements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... Interstate Movement of Bison Because of Brucellosis § 78.25 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of bison not otherwise provided for in...

  15. 9 CFR 78.25 - Other movements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... Interstate Movement of Bison Because of Brucellosis § 78.25 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of bison not otherwise provided for in...

  16. 9 CFR 78.25 - Other movements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Interstate Movement of Bison Because of Brucellosis § 78.25 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of bison not otherwise provided for in...

  17. 9 CFR 78.25 - Other movements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Interstate Movement of Bison Because of Brucellosis § 78.25 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of bison not otherwise provided for in...

  18. 9 CFR 78.5 - General restrictions.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Interstate Movement of Cattle Because of Brucellosis § 78.5 General restrictions. Cattle may not be moved interstate except in compliance with this subpart and with 9 CFR part 86. Cattle moved interstate...

  19. 9 CFR 78.13 - Other movements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... Interstate Movement of Cattle Because of Brucellosis § 78.13 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of cattle not otherwise provided for in...

  20. 78 FR 37246 - January 2013 Pay Schedules

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-20

    ... President signed Executive Order 13641 (78 FR 21503), which documented the January 2013 pay schedules... incorporated as part of this notice. U.S. Office of Personnel Management. Elaine Kaplan, Acting...

  1. 9 CFR 78.14 - Rodeo bulls.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Interstate Movement of Cattle Because of Brucellosis § 78.14 Rodeo bulls. (a) A rodeo bull that is test... date of being tested, may be moved interstate only if the bull meets the requirements for cattle...

  2. 9 CFR 78.13 - Other movements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... Interstate Movement of Cattle Because of Brucellosis § 78.13 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of cattle not otherwise provided for in...

  3. 9 CFR 78.14 - Rodeo bulls.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Interstate Movement of Cattle Because of Brucellosis § 78.14 Rodeo bulls. (a) A rodeo bull that is test... date of being tested, may be moved interstate only if the bull meets the requirements for cattle...

  4. 9 CFR 78.13 - Other movements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... Interstate Movement of Cattle Because of Brucellosis § 78.13 Other movements. The Administrator may, upon request in specific cases, permit the interstate movement of cattle not otherwise provided for in...

  5. 78 FR 17641 - Procurement List Additions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-22

    ...: Additions On 12/21/2012 (77 FR 75616) and 1/25/2013 (78 FR 5423), the Committee for Purchase From People Who...: MR 1057--Butterfly Mop, Hybrid Sponge NSN: MR 1058--Refill, Hybrid Sponge Head, Blue NPA:...

  6. 40 CFR 600.505-78 - Recordkeeping.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 1978 Passenger Automobiles and for 1979 and Later Model Year Automobiles (Light Trucks and Passenger Automobiles)-Procedures for Determining Manufacturer's Average Fuel Economy § 600.505-78 Recordkeeping....

  7. 40 CFR 600.503-78 - Abbreviations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 1978 Passenger Automobiles and for 1979 and Later Model Year Automobiles (Light Trucks and Passenger Automobiles)-Procedures for Determining Manufacturer's Average Fuel Economy § 600.503-78 Abbreviations....

  8. 78 FR 39342 - SHINE Medical Technologies, Inc.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-01

    ... receipt and availability of this application was previously published in the Federal Register (78 FR 29390... Commission. Alexander Adams, Jr., Chief, Research and Test Reactors Licensing Branch, Division of Policy...

  9. 78 FR 73897 - SHINE Medical Technologies, Inc.

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-09

    ... of Production and Utilization Facilities,'' in the Federal Register (78 FR 29390) on May 20, 2013. On... Commission. Alexander Adams, Jr., Chief, Research and Test Reactors Licensing Branch, Division of Policy...

  10. 9 CFR 78.5 - General restrictions.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions on Interstate Movement of Cattle Because of Brucellosis § 78.5 General restrictions. Cattle may not be...

  11. 9 CFR 78.20 - General restrictions.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS BRUCELLOSIS Restrictions on Interstate Movement of Bison Because of Brucellosis § 78.20 General restrictions. Bison may not be...

  12. 78 FR 17868 - Noncompensatory Partnership Options; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-25

    ..., 2013 (78 FR 7997) relating to the tax treatment of noncompensatory options and convertible instruments... value of $33,000 and basis of $24,000 ($30,000 original basis less $6,000 depreciation in Years...

  13. 22 CFR 62.78 - Termination.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Visitor Information System (SEVIS) § 62.78 Termination. An exchange visitor who willfully or negligently fails to comply with the requirements established in Public Law 104-208, as amended, shall be...

  14. Onychomycosis by molds. Report of 78 cases.

    PubMed

    Bonifaz, Alexandro; Cruz-Aguilar, Pamela; Ponce, Rosa María

    2007-01-01

    A retrospective study of onychomycohosis by molds was carried out during a 14-year period (1992-2005). All cases were clinically and mycologically proven (repetitive KOH and culture) and then each of the molds was identified. A total of 5,221 cases of onychomycosis were evaluated, 78 of which were molds (1.49%). Mean patient age was 44.1 years. 75/78 cases occurred in toenails. Associated factors were detected in 39/78 (50.0%) cases, with the major ones being: peripheral vascular disease, contact with soil, and trauma. The most frequent clinical presentation was distal and lateral subungual onychomycosis (DLSO), in 54/78 cases (69%). The most frequent causative agents were: Scopulariopsis brevicaulis in 34/78 cases and Aspergillus niger in 13/78 cases. Onychomycoses by molds are infrequent; in this study they accounted for 1.49% of cases. The clinical features are virtually similar to those caused by dermatophytes, which makes the clinicomycological tests necessary.

  15. Phase equilibria and crystal chemistry of rubidium niobates and rubidium tantalates

    NASA Technical Reports Server (NTRS)

    Minor, D. B.; Roth, R. S.; Parker, H. S.; Brower, W. S.

    1977-01-01

    The phase equilibria relations and crystal chemistry of portions of the Rb2O-Nb2O5 and Rb2O-Ta2O5 systems were investigated for structures potentially useful as ionic conductors. A hexagonal tungsten bronze-type (HTB) structure was found in both systems as well as three hexagonal phases with mixed HTB-pyrochlore type structures. Ion exchange experiments between various alkali ions are described for several phases. Unit cell dimensions and X-ray diffraction powder patterns are reported.

  16. 78 FR 39259 - Submission for OMB Review; Comment Request; Correction

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-07-01

    ... Number. In the Federal Register of June 18, 2013 at 78 FR 36542, in the first column, correct the Docket... Register on June 18, 2013, 78 FR 36542, regarding the Submission for OMB Review; Comment Request for...

  17. Complete Genome Sequence of Rahnella aquatilis CIP 78.65

    PubMed Central

    Bruce, David; Detter, Chris; Goodwin, Lynne A.; Han, James; Han, Cliff S.; Held, Brittany; Land, Miriam L.; Mikhailova, Natalia; Nolan, Matt; Pennacchio, Len; Pitluck, Sam; Tapia, Roxanne; Woyke, Tanja; Sobecky, Patricia A.

    2012-01-01

    Rahnella aquatilis CIP 78.65 is a gammaproteobacterium isolated from a drinking water source in Lille, France. Here we report the complete genome sequence of Rahnella aquatilis CIP 78.65, the type strain of R. aquatilis. PMID:22582378

  18. 78 FR 79660 - Enhancing Agricultural Coexistence; Extension of Comment Period

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-31

    ... period for the notice published on November 4, 2013 (78 FR 65960) is extended. We will consider all... . SUPPLEMENTARY INFORMATION: On November 4, 2013, we published in the Federal Register (78 FR 65960-65962,...

  19. Complete Genome Sequence of Rahnella aquatilis CIP 78.65

    SciTech Connect

    Martinez, Robert J; Bruce, David; Detter, J C; Goodwin, Lynne A.; Han, James; Han, Cliff; Held, Brittany; Land, Miriam L; Mikhailova, Natalia; Nolan, Matt; Pennacchio, Len; Pitluck, Sam; Tapia, Roxanne; Woyke, Tanja; Sobeckya, Patricia A.

    2012-01-01

    Rahnella aquatilis CIP 78.65 is a gammaproteobacterium isolated from a drinking water source in Lille, France. Here we report the complete genome sequence of Rahnella aquatilis CIP 78.65, the type strain of R. aquatilis.

  20. 78 FR 24733 - Procurement List, Additions and Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-26

    ... . SUPPLEMENTARY INFORMATION: Additions On 2/8/2013 (78 FR 9386-9387); 2/22/2013 (78 FR 12296-12297); 3/1/ 2013 (78 FR 13868-13869); and 3/8/2013 (78 FR 15000), the Committee for Purchase From People Who Are Blind or... NSN: 7930-00-NIB-0651--Liquid Solution, Concentrated, Vehicle, Wash and Shine, With Wax polymer, (4)...

  1. 78 FR 73503 - Procurement List Additions and Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-06

    ... . SUPPLEMENTARY INFORMATION: Additions On 8/9/2013 (78 FR 48656-48657), and 9/6/2013 (78 FR 54871), the Committee... aggregated by the Defense Commissary Agency. Deletions On 10/25/2013 (78 FR 63967-63968) and 11/1/2013 (78 FR... Containers, Holiday, 12 oz. or 16 oz., 6PK. NSN: MR 380--Set, Baking Cups and Picks, Holiday, 24PC....

  2. 78 FR 50039 - Procurement List, Additions and Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-16

    ... . SUPPLEMENTARY INFORMATION: Additions On 6/7/2013 (78 FR 34350-34351); 6/14/2013 (78 FR 35874-35875); 6/ 21/2013 (78 FR 37524-37525); and 6/28/2013 (78 FR 38952-38953), the Committee for Purchase From People Who Are... Federal Government under 41 U.S.C. 8501-8506 and 41 CFR 51-2.4. Regulatory Flexibility Act Certification...

  3. 78 FR 46926 - Procurement List Additions and Deletions

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-08-02

    ... . SUPPLEMENTARY INFORMATION: Additions On 5/31/2013 (78 FR 32631-32632); 6/7/2013 (78 FR 34350-34351); and 6/21/2013 (78 FR 37524-37525), the Committee for Purchase From People Who Are Blind or Severely Disabled... Contracting Activity: Dept of the Army, W071 ENDIST Kansas City, Kansas City, MO Deletions On 5/31/2013 (78...

  4. 10 CFR 212.78 - Tertiary incentive crude oil.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 3 2010-01-01 2010-01-01 false Tertiary incentive crude oil. 212.78 Section 212.78 Energy DEPARTMENT OF ENERGY OIL MANDATORY PETROLEUM PRICE REGULATIONS Producers of Crude Oil § 212.78 Tertiary incentive crude oil. Annual prepaid expenses report. By January 31 of each year after 1980, the...

  5. 7 CFR 201.78 - Pollen control for hybrids.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 3 2013-01-01 2013-01-01 false Pollen control for hybrids. 201.78 Section 201.78... REGULATIONS Additional Requirements for the Certification of Plant Materials of Certain Crops § 201.78 Pollen... branches, or any combination thereof, shedding pollen. (c) Sorghum. Shedders in the seed parent, at any...

  6. 7 CFR 201.78 - Pollen control for hybrids.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Pollen control for hybrids. 201.78 Section 201.78... REGULATIONS Additional Requirements for the Certification of Plant Materials of Certain Crops § 201.78 Pollen... branches, or any combination thereof, shedding pollen. (c) Sorghum. Shedders in the seed parent, at any...

  7. 7 CFR 201.78 - Pollen control for hybrids.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 3 2011-01-01 2011-01-01 false Pollen control for hybrids. 201.78 Section 201.78... REGULATIONS Additional Requirements for the Certification of Plant Materials of Certain Crops § 201.78 Pollen... branches, or any combination thereof, shedding pollen. (c) Sorghum. Shedders in the seed parent, at any...

  8. 7 CFR 201.78 - Pollen control for hybrids.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 3 2012-01-01 2012-01-01 false Pollen control for hybrids. 201.78 Section 201.78... REGULATIONS Additional Requirements for the Certification of Plant Materials of Certain Crops § 201.78 Pollen... branches, or any combination thereof, shedding pollen. (c) Sorghum. Shedders in the seed parent, at any...

  9. 7 CFR 201.78 - Pollen control for hybrids.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 3 2014-01-01 2014-01-01 false Pollen control for hybrids. 201.78 Section 201.78... REGULATIONS Additional Requirements for the Certification of Plant Materials of Certain Crops § 201.78 Pollen... branches, or any combination thereof, shedding pollen. (c) Sorghum. Shedders in the seed parent, at any...

  10. 46 CFR 78.37-10 - Official log entires.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Official log entires. 78.37-10 Section 78.37-10 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Logbook Entries § 78.37-10 Official log entires. (a) In addition to other items required to be entered in the...

  11. 48 CFR 1511.011-78 - Advisory and assistance services.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 48 Federal Acquisition Regulations System 6 2010-10-01 2010-10-01 true Advisory and assistance services. 1511.011-78 Section 1511.011-78 Federal Acquisition Regulations System ENVIRONMENTAL PROTECTION AGENCY ACQUISITION PLANNING DESCRIBING AGENCY NEEDS 1511.011-78 Advisory and assistance...

  12. 46 CFR 180.78 - Stowage of life jackets.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be capable... 46 Shipping 7 2014-10-01 2014-10-01 false Stowage of life jackets. 180.78 Section 180.78 Shipping...) LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.78 Stowage of life jackets....

  13. 46 CFR 117.78 - Stowage of life jackets.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... accommodation spaces. (1) Each stowage container for life jackets must not be capable of being locked. If... 46 Shipping 4 2012-10-01 2012-10-01 false Stowage of life jackets. 117.78 Section 117.78 Shipping... Ring Life Buoys and Life Jackets § 117.78 Stowage of life jackets. (a) General. Unless otherwise...

  14. 46 CFR 180.78 - Stowage of life jackets.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... distributed throughout accommodation spaces. (1) Each stowage container for life jackets must not be capable... 46 Shipping 7 2013-10-01 2013-10-01 false Stowage of life jackets. 180.78 Section 180.78 Shipping...) LIFESAVING EQUIPMENT AND ARRANGEMENTS Ring Life Buoys and Life Jackets § 180.78 Stowage of life jackets....

  15. 46 CFR 117.78 - Stowage of life jackets.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... accommodation spaces. (1) Each stowage container for life jackets must not be capable of being locked. If... 46 Shipping 4 2011-10-01 2011-10-01 false Stowage of life jackets. 117.78 Section 117.78 Shipping... Ring Life Buoys and Life Jackets § 117.78 Stowage of life jackets. (a) General. Unless otherwise...

  16. 78 FR 33199 - Airworthiness Directives; Dassault Aviation Airplanes

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-04

    ... in the Federal Register on February 5, 2013 (78 FR 8052). That NPRM proposed to correct an unsafe... received no comments on the NPRM (78 FR 8052, February 5, 2013) or on the determination of the cost to the... minor changes: ] Are consistent with the intent that was proposed in the NPRM (78 FR 8052, February...

  17. 46 CFR 78.17-10 - Loudspeaker system.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 3 2011-10-01 2011-10-01 false Loudspeaker system. 78.17-10 Section 78.17-10 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Tests, Drills, and Inspections § 78.17-10 Loudspeaker system. (a) Where fitted, the complete loudspeaker system shall be...

  18. 46 CFR 78.17-10 - Loudspeaker system.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 3 2010-10-01 2010-10-01 false Loudspeaker system. 78.17-10 Section 78.17-10 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Tests, Drills, and Inspections § 78.17-10 Loudspeaker system. (a) Where fitted, the complete loudspeaker system shall be...

  19. 46 CFR 78.17-10 - Loudspeaker system.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 3 2014-10-01 2014-10-01 false Loudspeaker system. 78.17-10 Section 78.17-10 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Tests, Drills, and Inspections § 78.17-10 Loudspeaker system. (a) Where fitted, the complete loudspeaker system shall be...

  20. 46 CFR 78.17-10 - Loudspeaker system.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 3 2013-10-01 2013-10-01 false Loudspeaker system. 78.17-10 Section 78.17-10 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PASSENGER VESSELS OPERATIONS Tests, Drills, and Inspections § 78.17-10 Loudspeaker system. (a) Where fitted, the complete loudspeaker system shall be...