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Sample records for ytterbium 175

  1. Ytterbium

    SciTech Connect

    1994-01-01

    The crustal abundance of ytterbium amounts to three parts per million, the same as tin, bromine and boron, and just above uranium, beryllium and arsenic. Ytterbium occurs as a minor to moderate constituent in most of the rare earth minerals. The apparent ytterbium contents of these various minerals in combination with production data for the countries involved provide the basis for calculation of the production potential for ytterbium. This potential amounts to about 40 tons per year. Much of this potential is unrealized, however, since ytterbium is only recovered when: (1) Markets exist in which it can be sold, (2) The sales price exceeds the cost of production.

  2. Preparation, Biological Evaluation and Dosimetry Studies of 175Yb-Bis-Phosphonates for Palliative Treatment of Bone Pain

    PubMed Central

    Fakhari, Ashraf; Jalilian, Amir R.; Yousefnia, Hassan; Shanehsazzadeh, Saeed; Samani, Ali Bahrami; Daha, Fariba Johari; Ardestani, Mehdi Shafiee; Khalaj, Ali

    2015-01-01

    Objective: Optimized production and quality control of ytterbium-175 (Yb-175) labeled pamidronate and alendronate complexes as efficient agents for bone pain palliation has been presented. Methods: Yb-175 labeled pamidronate and alendronate (175Yb-PMD and 175Yb-ALN) complexes were prepared successfully at optimized conditions with acceptable radiochemical purity, stability and significant hydroxyapatite absorption. The biodistribution of complexes were evaluated up to 48 h, which demonstrated significant bone uptake ratios for 175Yb-PAM at all-time intervals. It was also detected that 175Yb-PAM mostly washed out and excreted through the kidneys. Results: The performance of 175Yb-PAM in an animal model was better or comparable to other 175Yb-bone seeking complexes previously reported. Conclusion: Based on calculations, the total body dose for 175Yb-ALN is 40% higher as compared to 175Yb-PAM (especially kidneys) indicating that 175Yb-PAM is probably a safer agent than 175Yb-ALN.

  3. Photoassociative production of ultracold heteronuclear ytterbium molecules

    SciTech Connect

    Borkowski, Mateusz; Ciurylo, Roman; Yamazaki, Rekishu; Takahashi, Yoshiro; Hara, Hideaki; Taie, Shintaro; Sugawa, Seiji; Takasu, Yosuke; Enomoto, Katsunari

    2011-09-15

    We report observations of photoassociation (PA) spectra near the intercombination line in isotopic mixtures of ultracold ytterbium gases. Several heteronuclear bound states have been found for the excited {sup 170}Yb{sup 174}Yb and {sup 174}Yb{sup 176}Yb molecules. We develop a single-channel mass-scaled interaction model for the excited state molecule which well reproduces the measured bound state energies. This is an important step toward optical control of interactions in mixtures of ultracold ytterbium gases using heteronuclear optical Feshbach resonances. The model developed is applicable in collisions of other similar systems, such as cadmium and mercury.

  4. Hydrothermal synthesis of ytterbium silicate nanoparticles.

    PubMed

    Chen, Hongfei; Gao, Yanfeng; Liu, Yun; Luo, Hongjie

    2010-02-15

    A simple, low-cost hydrothermal method was developed to synthesize 20-nm-diameter single-crystalline ytterbium silicate (Yb(2)Si(2)O(7) and Yb(2)SiO(5)) nanoparticles at 200 degrees C. This is nearly 1000 degrees C lower than that for the typical sol-gel route to ytterbium silicate powders. Obtained powders showed very low thermal conductivity, a suitable thermal expansion coefficient, and excellent thermal/structural stability, suggesting a potential application to environmental and thermal barrier coatings. Special focus was placed on assessing the hydrothermal reaction mechanism for particle formation. PMID:20085266

  5. Ubiquitous Magnetic Excitations in the Ytterbium Pyrochlores

    NASA Astrophysics Data System (ADS)

    Hallas, Alannah; Gaudet, Jonathan; Butch, Nicholas; Tachibana, Makoto; Freitas, Rafael; Wiebe, Chris; Luke, Graeme; Gaulin, Bruce

    The ytterbium pyrochlores, Yb2B2O7 (B = Sn, Ti, Ge) are well described in terms of Seff = 1/2 quantum spins with local XY anisotropy, decorating the cubic pyrochlore lattice and interacting via anisotropic exchange. While structurally only the non-magnetic B-site cation, and hence, primarily the lattice parameter, is changing across the series Yb2B2O7 (B = Sn, Ti, Ge), a range of magnetic behavior is observed. The low temperature magnetism in Yb2Ti2O7 and Yb2Sn2O7 has ferromagnetic character. Conversely, Yb2Ge2O7 displays an antiferromagnetically ordered Neel state at low temperatures. We present a comparative analysis of the spin dynamic properties of these three systems using inelastic neutron scattering. While the static properties of the ytterbium pyrochlores are distinct from one another, we find a ubiquitous character to the spin dynamics. The inelastic scattering for each of these ytterbium pyrochlores show a gapless continuum of spin excitations, that tends to resemble over-damped ferromagnetic spin waves at low Q. Furthermore, the specific heat for each of these materials follows a common form with a broad, high-temperature anomaly followed by a sharp low-temperature anomaly. We find that the dynamic properties correlate strongly with the broad specific heat anomaly but remain unchanged across the sharp, low temperature specific heat anomaly.

  6. Hydrates of ytterbium tris-acetylacetonate

    SciTech Connect

    Martynenko, L.I.; Burova, S.A.; Pisarevskii, A.P.

    1995-05-01

    By means of preparative chemistry, chemical, X-ray structural, X-ray phase, and thermal analysis, the existence of the earlier disputed ytterbium acetylacetonate dihydrate YbA{sub 3} {center_dot} 2H{sub 2}O was proven. The structure of YbA{sub 3} {center_dot} 2H{sub 2}O contains monomeric molecules, linked into layers by hydrogen bonds. The coordination polyhedron of the Yb atom is a slightly distorted square antiprism. The Yb-O distances in the dihydrate are significantly longer than those in the monohydrate YbA{sub 3} {center_dot} 2H{sub 2}O. The absence of correlations between the Yb-O, O-C, and C-C bond lengths in the chelate cycles was observed. This proves the predominantly ionic nature of the metal-ligand bond in these compounds. The scheme for the interconversions of the hydrates of ytterbium tris-acetylacetonate is suggested, and their thermodynamic stability is discussed.

  7. Dielectric and magnetic anisotropy of a nematic ytterbium complex

    SciTech Connect

    Dobrun, L. A. Sakhatskii, A. S.; Kovshik, A. P.; Ryumtsev, E. I.; Kolomiets, I. P.; Knyazev, A. A.; Galyametdinov, Yu. G.

    2015-05-15

    The sign and the magnitude of the dielectric anisotropy of an ytterbium-based paramagnetic nematic liquid crystal complex, namely, tris[1-(4-(4-propylcyclohexyl)phenyl)octane-1,3-dione]-[5,5'-di (heptadecile)-2,2'-bipyridine]ytterbium, are determined. The temperature dependence of the permittivity components of the complex is obtained in the temperature range of a nematic phase. The sign of the anisotropy of the magnetic susceptibility of this compound is experimentally determined.

  8. Feasibility study for production of 175Yb: a promising therapeutic radionuclide.

    PubMed

    Chakraborty, Sudipta; Unni, P R; Venkatesh, Meera; Pillai, M R A

    2002-09-01

    Owing to its favourable decay characteristics 175Yb (T1/2 = 4.2 d, E beta(max) = 480 keV) can be regarded as a potential radionuclide for therapeutic applications. Production of 175Yb using (174Yb(n, gamma)175Yb) reaction by thermal neutron bombardment on natural ytterbium target is described. The activity of 175Yb produced as well as its radionuclidic purity under different irradiation conditions were determined by gamma-ray spectrometry using an HPGe 4 K MCA system and compared with theoretically calculated values. The radiochemical purity after chemical processing was determined by paper chromatography as well as paper electrophoresis techniques. It is found that 31 Ci/g (1145 GBq/g) of 175Yb can be produced with > 95% radionuclidic purity (with approximately 3% of 169Yb and approximately 2% of 177Lu) by irradiating natural Yb2O3 target at a thermal neutron flux of 3 x 10(13) n/cm2/s for a period of 5 d. PMID:12201133

  9. Investigations Into Ytterbium, Ytterbium-Erbium and Thulium-Doped Silica-Based Fibre Lasers

    NASA Astrophysics Data System (ADS)

    Perry, Ian Richard

    Available from UMI in association with The British Library. Continuous-wave monomode laser oscillation has been demonstrated in ytterbium-doped fiber at 974nm and around 1040nm for pump wavelengths in the 0.8mu m region. High slope efficiencies (up to 78%) and low threshold powers (10mW absorbed) were measured for this device. Tunable operation from 1000nm to 1162nm, the generation of Q-switched pulses, and efficient amplified spontaneous emission have also been demonstrated, and some of these features have been modelled. A fibre doped with erbium and sensitised with ytterbium has been investigated to study the effect of energy transfer from the ytterbium co-dopant to the erbium ions after excitation at wavelengths in the 0.8 ?m region. The effects of pump excited state absorption on the threshold and slope efficiency have been characterised. Continuous-wave monomode laser oscillation was observed at 1.564mum with a 5mW absorbed threshold power. The laser wavelength was tunable from 1.521mum to 1.562mu m. Continuous-wave monomode laser action in a thulium -doped fibre, also pumped in the 0.8mum region, was observed at around 2mum with an absorbed threshold power of about 30mW. The laser wavelength was tunable from 1810nm to 2014nm. A change of pump source to a high power Nd:YAG laser operating at 1.064mum yielded fibre laser output powers of up to 1.35W with a threshold power of 600mW. Pump excited state absorption at 1.064mum and the resulting upconverted visible fluorescence has been investigated and modelled.

  10. 25 CFR 175.6 - Information collection.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Information collection. 175.6 Section 175.6 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.6 Information collection. The information collection requirements contained in § 175.22 have been approved by the Office...

  11. 1028 nm single mode Ytterbium-doped fiber laser

    NASA Astrophysics Data System (ADS)

    Paul, M. C.; Harun, S. W.; Moghaddam, M. R. A.; Das, S.; Sen, R.; Dhar, A.; Pal, M.; Bhadra, S. K.; Ahmad, H.

    2009-05-01

    An efficient Ytterbium-doped fiber laser (YDFL) operating at 1028 nm is demonstrated using a fiber Bragg grating (FBG). The Ytterbium-doped fiber (YDF) is drawn from Yb2O3-doped preform, fabricated through deposition of porous layer of composition SiO2-GeO2 by the MCVD process in conjunction with a solution doping technique. The fabricated YDF has a 0.1 mol % of Yb2O3 in the core, a Ytterbium ion lifetime of 1.1 ms, an absorption of 7.65 dB/m at 976 nm. The fiber laser has the maximum efficiency of 51% with pump power threshold of 19 mW using a FBG in conjunction with a Fresnel reflection to form a linear cavity resonator. The efficiency and threshold are better compared to the similar YDFL configuration using a commercial YDF.

  12. Quantum gas microscopy of ytterbium: cool me twice

    NASA Astrophysics Data System (ADS)

    Vengalattore, Mukund

    2016-03-01

    The site-resolved detection of ultracold atoms in optical lattice potentials is a powerful technique to study lattice models of correlated quantum matter. In their recent paper, Yamamoto et al (2016 New J. Phys. 18 023016) demonstrate a quantum gas microscope for ultracold ytterbium atoms. By simultaneously cooling these atoms on two optical transitions, they show that fluorescent images of the lattice gas can be obtained while keeping the atoms pinned to their lattice sites even for a lattice spacing as small as 266 nm. This promises to be a powerful enabling tool for studies of metrology and quantum magnetism with quantum degenerate gases of ytterbium.

  13. All-fibre ytterbium laser tunable within 45 nm

    SciTech Connect

    Abdullina, S R; Babin, S A; Vlasov, A A; Kablukov, S I; Shelemba, I S; Kurkov, A S

    2007-12-31

    A tunable ytterbium-doped fibre laser is fabricated. The laser is tuned by using a tunable fibre Bragg grating (FBG) as a selecting intracavity element. The laser is tunable within 45 nm (from 1063 to 1108 nm) and emits {approx}6 W in the line of width {approx}0.15 nm, the output power and linewidth being virtually invariable within the tuning range. The method is proposed for synchronous tuning the highly reflecting and output FBGs, and a tunable ytterbium all-fibre laser is built. (lasers)

  14. Gain measurements at 5 nm in nickel-like ytterbium

    SciTech Connect

    MacGowan, B.J.; Bourgade, J.L.; Combis, P.; Keane, C.J.; Louis-Jacquet, M.; Matthews, D.L.; Naccache, D.; Stone, G.; Thiell, G.; Whelan, D.A.

    1988-03-01

    Soft x-ray gain has been demonstrated at 5.03 nm within a laser produced plasma of Ni-like ytterbium. Experiments will also be described with higher Z Ni-like ions which can produce even shorter wavelength x-ray laser transition. 3 refs.

  15. Discovery of dysprosium, holmium, erbium, thulium, and ytterbium isotopes

    SciTech Connect

    Fry, C.; Thoennessen, M.

    2013-09-15

    Currently, thirty-one dysprosium, thirty-two holmium, thirty-two erbium, thirty-three thulium, and thirty-one ytterbium 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.

  16. Toward IFE Oriented Laser Chains: Cryogenically Cooled Ytterbium Doped Materials

    SciTech Connect

    Bourdet, G.; Casagrande, O.; Cardinali, V.; Deguil-Robin, N.; Le Garrec, B.

    2009-09-27

    With the aim to set up Inertial Fusion Energy (IFE) driver, we develop the properties of the Ytterbium doped materials and the problems met when designing such a system: essentially thermal management and ASE gain depletion. We after present the experimental results obtained using sesquioxide Yb{sup 3+} doped ceramics at cryogenic temperature. We also propose a solution for minimizing the ASE problem.

  17. Cu-In-Yb (Copper-Indium-Ytterbium)

    NASA Astrophysics Data System (ADS)

    Materials Science International Team MSIT

    This document is part of Subvolume C2 'Non-Ferrous Metal Systems. Part 2: Selected Copper Systems' of Volume 11 'Ternary Alloy Systems - Phase Diagrams, Crystallographic and Thermodynamic Data critically evaluated by MSIT®' of Landolt-Börnstein - Group IV 'Physical Chemistry'. It provides data of the ternary system Copper -Indium-Ytterbium.

  18. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  19. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  20. 22 CFR 17.5 - Financial hardship.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 22 Foreign Relations 1 2014-04-01 2014-04-01 false Financial hardship. 17.5 Section 17.5 Foreign... SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior to receipt and evaluation of a completed Statement of Financial Status, duly sworn by the...

  1. 22 CFR 17.5 - Financial hardship.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 22 Foreign Relations 1 2013-04-01 2013-04-01 false Financial hardship. 17.5 Section 17.5 Foreign... SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior to receipt and evaluation of a completed Statement of Financial Status, duly sworn by the...

  2. 22 CFR 17.5 - Financial hardship.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 22 Foreign Relations 1 2011-04-01 2011-04-01 false Financial hardship. 17.5 Section 17.5 Foreign... SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior to receipt and evaluation of a completed Statement of Financial Status, duly sworn by the...

  3. 25 CFR 175.24 - Utility responsibilities.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.24 Utility responsibilities. A utility subject to this part shall:...

  4. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  5. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  6. 25 CFR 175.30 - Billing.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Billing. 175.30 Section 175.30 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.30 Billing. (a) Metered customers. The utility shall render bills at monthly...

  7. 25 CFR 175.32 - Collections.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Collections. 175.32 Section 175.32 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.32 Collections. The utility shall attempt collection on checks returned...

  8. 25 CFR 175.23 - Customer responsibilities.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Utility Service Administration § 175.23 Customer responsibilities. The customer(s) of a utility subject to... 25 Indians 1 2010-04-01 2010-04-01 false Customer responsibilities. 175.23 Section 175.23 Indians... they apply to the installation and operation of customer-owned equipment; (b) Be responsible...

  9. 25 CFR 175.51 - Ownership.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Ownership. 175.51 Section 175.51 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.51 Ownership. All rights-of-way, material, or equipment furnished and/or installed by a customer pursuant...

  10. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 2 2012-10-01 2012-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  11. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 2 2013-10-01 2013-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  12. 49 CFR 175.705 - Radioactive contamination.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 2 2014-10-01 2014-10-01 false Radioactive contamination. 175.705 Section 175.705... Regulations Applicable According to Classification of Material § 175.705 Radioactive contamination. (a) A... (radioactive) materials that may have been released from their packagings. (b) When contamination is present...

  13. 32 CFR 644.175 - Cross Reference.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 4 2011-07-01 2011-07-01 false Cross Reference. 644.175 Section 644.175 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY (CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Relocation Assistance Program § 644.175 Cross Reference. See part 641 of this chapter...

  14. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  15. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  16. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  17. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  18. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  19. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  20. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  1. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  2. 33 CFR 175.113 - Launchers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... approved under 46 CFR 160.028 must also be carried. ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Launchers. 175.113 Section 175... SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.113 Launchers. (a) When a visual...

  3. 33 CFR 175.135 - Existing equipment.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Existing equipment. 175.135 Section 175.135 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.135 Existing equipment....

  4. 14 CFR 93.175 - Applicability.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Applicability. 93.175 Section 93.175... AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Special Flight Rules in the Vicinity of Luke AFB, AZ § 93.175 Applicability. This subpart prescribes a Special Air Traffic Rule for aircraft...

  5. 14 CFR 93.175 - Applicability.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 2 2010-01-01 2010-01-01 false Applicability. 93.175 Section 93.175... AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Special Flight Rules in the Vicinity of Luke AFB, AZ § 93.175 Applicability. This subpart prescribes a Special Air Traffic Rule for aircraft...

  6. 14 CFR 93.175 - Applicability.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 2 2014-01-01 2014-01-01 false Applicability. 93.175 Section 93.175... AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Special Flight Rules in the Vicinity of Luke AFB, AZ § 93.175 Applicability. This subpart prescribes a Special Air Traffic Rule for aircraft...

  7. 14 CFR 93.175 - Applicability.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 2 2011-01-01 2011-01-01 false Applicability. 93.175 Section 93.175... AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Special Flight Rules in the Vicinity of Luke AFB, AZ § 93.175 Applicability. This subpart prescribes a Special Air Traffic Rule for aircraft...

  8. 14 CFR 93.175 - Applicability.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Applicability. 93.175 Section 93.175... AND GENERAL OPERATING RULES SPECIAL AIR TRAFFIC RULES Special Flight Rules in the Vicinity of Luke AFB, AZ § 93.175 Applicability. This subpart prescribes a Special Air Traffic Rule for aircraft...

  9. 33 CFR 175.201 - Ventilation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... unless it is equipped with an operable ventilation system that meets the requirements of 33 CFR 183.610... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Ventilation. 175.201 Section 175... SAFETY EQUIPMENT REQUIREMENTS Ventilation § 175.201 Ventilation. No person may operate a boat built...

  10. 21 CFR 137.175 - Phosphated flour.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Related Products § 137.175 Phosphated flour. Phosphated flour, phosphated white flour, and phosphated wheat flour, conform to the definition and standard of identity, and are subject to the requirements for... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Phosphated flour. 137.175 Section 137.175 Food...

  11. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  12. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... PERMITTED FOR DIRECT ADDITION TO FOOD FOR HUMAN CONSUMPTION Food Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified foods in accordance with...

  13. 21 CFR 172.175 - Sodium nitrite.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Sodium nitrite. 172.175 Section 172.175 Food and... Preservatives § 172.175 Sodium nitrite. The food additive sodium nitrite may be safely used in or on specified... follows: (1) As a color fixative in smoked cured tunafish products so that the level of sodium...

  14. 25 CFR 175.51 - Ownership.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Ownership. 175.51 Section 175.51 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.51 Ownership. All rights-of-way, material, or equipment furnished and/or installed by a customer pursuant...

  15. 32 CFR 644.175 - Cross Reference.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 4 2010-07-01 2010-07-01 true Cross Reference. 644.175 Section 644.175 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY (CONTINUED) REAL PROPERTY REAL ESTATE HANDBOOK Relocation Assistance Program § 644.175 Cross Reference. See part 641 of this chapter for...

  16. 2 CFR 175.20 - Referral.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Referral. 175.20 Section 175.20 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS AWARD TERM FOR TRAFFICKING IN PERSONS § 175.20 Referral....

  17. 50 CFR 17.5 - Alaska natives.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 50 Wildlife and Fisheries 2 2013-10-01 2013-10-01 false Alaska natives. 17.5 Section 17.5 Wildlife... (CONTINUED) ENDANGERED AND THREATENED WILDLIFE AND PLANTS Introduction and General Provisions § 17.5 Alaska... resides in Alaska; or (2) Any non-native permanent resident of an Alaskan native village who is...

  18. 50 CFR 17.5 - Alaska natives.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 50 Wildlife and Fisheries 2 2010-10-01 2010-10-01 false Alaska natives. 17.5 Section 17.5 Wildlife... (CONTINUED) ENDANGERED AND THREATENED WILDLIFE AND PLANTS Introduction and General Provisions § 17.5 Alaska... resides in Alaska; or (2) Any non-native permanent resident of an Alaskan native village who is...

  19. 50 CFR 17.5 - Alaska natives.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 50 Wildlife and Fisheries 2 2012-10-01 2012-10-01 false Alaska natives. 17.5 Section 17.5 Wildlife... (CONTINUED) ENDANGERED AND THREATENED WILDLIFE AND PLANTS Introduction and General Provisions § 17.5 Alaska... resides in Alaska; or (2) Any non-native permanent resident of an Alaskan native village who is...

  20. 50 CFR 17.5 - Alaska natives.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 50 Wildlife and Fisheries 2 2014-10-01 2014-10-01 false Alaska natives. 17.5 Section 17.5 Wildlife... (CONTINUED) ENDANGERED AND THREATENED WILDLIFE AND PLANTS Introduction and General Provisions § 17.5 Alaska... resides in Alaska; or (2) Any non-native permanent resident of an Alaskan native village who is...

  1. 50 CFR 17.5 - Alaska natives.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 50 Wildlife and Fisheries 2 2011-10-01 2011-10-01 false Alaska natives. 17.5 Section 17.5 Wildlife... (CONTINUED) ENDANGERED AND THREATENED WILDLIFE AND PLANTS Introduction and General Provisions § 17.5 Alaska... resides in Alaska; or (2) Any non-native permanent resident of an Alaskan native village who is...

  2. 33 CFR 175.128 - Marking.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... specified in 46 CFR Parts 160 and 161. ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Marking. 175.128 Section 175.128... EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.128 Marking. No person may use a boat unless...

  3. 7 CFR 1.75 - General stipulations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 1 2010-01-01 2010-01-01 false General stipulations. 1.75 Section 1.75 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Cooperative Production of Television Films § 1.75 General stipulations. In requesting special working arrangements the producer must agree to the following stipulations: (a) The...

  4. 33 CFR 175.140 - Prohibited use.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Prohibited use. 175.140 Section 175.140 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Visual Distress Signals § 175.140 Prohibited use. No person in...

  5. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 2 2012-10-01 2012-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST... Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes... “Milwaukee route”); (b) Burns Harbor, IN (the “Burns Harbor route”); (c) St. Joseph, MI (the “St....

  6. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 2 2014-10-01 2014-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST... Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes... “Milwaukee route”); (b) Burns Harbor, IN (the “Burns Harbor route”); (c) St. Joseph, MI (the “St....

  7. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 2 2011-10-01 2011-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST... Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes... “Milwaukee route”); (b) Burns Harbor, IN (the “Burns Harbor route”); (c) St. Joseph, MI (the “St....

  8. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 2 2013-10-01 2013-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST... Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes... “Milwaukee route”); (b) Burns Harbor, IN (the “Burns Harbor route”); (c) St. Joseph, MI (the “St....

  9. 46 CFR 45.175 - Applicable routes.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 2 2010-10-01 2010-10-01 false Applicable routes. 45.175 Section 45.175 Shipping COAST... Barges on Lake Michigan Routes § 45.175 Applicable routes. This subpart applies to the following routes on Lake Michigan, between Chicago (Calumet Harbor), IL, and— (a) Milwaukee, WI (the “Milwaukee...

  10. 21 CFR 17.5 - Complaint.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 1 2012-04-01 2012-04-01 false Complaint. 17.5 Section 17.5 Food and Drugs FOOD... HEARINGS § 17.5 Complaint. (a) The Center with principal jurisdiction over the matter involved shall begin all administrative civil money penalty actions by serving on the respondent(s) a complaint signed...

  11. 21 CFR 17.5 - Complaint.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 1 2011-04-01 2011-04-01 false Complaint. 17.5 Section 17.5 Food and Drugs FOOD... HEARINGS § 17.5 Complaint. (a) The Center with principal jurisdiction over the matter involved shall begin all administrative civil money penalty actions by serving on the respondent(s) a complaint signed...

  12. 21 CFR 17.5 - Complaint.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 1 2010-04-01 2010-04-01 false Complaint. 17.5 Section 17.5 Food and Drugs FOOD... HEARINGS § 17.5 Complaint. (a) The Center with principal jurisdiction over the matter involved shall begin all administrative civil money penalty actions by serving on the respondent(s) a complaint signed...

  13. 21 CFR 17.5 - Complaint.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 1 2013-04-01 2013-04-01 false Complaint. 17.5 Section 17.5 Food and Drugs FOOD... HEARINGS § 17.5 Complaint. (a) The Center with principal jurisdiction over the matter involved shall begin all administrative civil money penalty actions by serving on the respondent(s) a complaint signed...

  14. 21 CFR 17.5 - Complaint.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 1 2014-04-01 2014-04-01 false Complaint. 17.5 Section 17.5 Food and Drugs FOOD... HEARINGS § 17.5 Complaint. (a) The Center with principal jurisdiction over the matter involved shall begin all administrative civil money penalty actions by serving on the respondent(s) a complaint signed...

  15. 5 CFR 175.101 - Policy.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 5 Administrative Personnel 1 2010-01-01 2010-01-01 false Policy. 175.101 Section 175.101... CLASSIFIED DOCUMENTS § 175.101 Policy. The Office of Personnel Management bases its procedures for handling national security information on Executive Order 12065, “National Security Information,” and...

  16. 5 CFR 175.101 - Policy.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 5 Administrative Personnel 1 2012-01-01 2012-01-01 false Policy. 175.101 Section 175.101... CLASSIFIED DOCUMENTS § 175.101 Policy. The Office of Personnel Management bases its procedures for handling national security information on Executive Order 12065, “National Security Information,” and...

  17. 5 CFR 175.101 - Policy.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 5 Administrative Personnel 1 2011-01-01 2011-01-01 false Policy. 175.101 Section 175.101... CLASSIFIED DOCUMENTS § 175.101 Policy. The Office of Personnel Management bases its procedures for handling national security information on Executive Order 12065, “National Security Information,” and...

  18. 22 CFR 17.5 - Financial hardship.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... UNDER THE FOREIGN SERVICE RETIREMENT AND DISABILITY SYSTEM (FSRDS) AND THE FOREIGN SERVICE PENSION SYSTEM (FSPS) § 17.5 Financial hardship. (a) Waiver of overpayment will not be allowed in any case prior... 22 Foreign Relations 1 2010-04-01 2010-04-01 false Financial hardship. 17.5 Section 17.5...

  19. 2 CFR 175.20 - Referral.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2 Grants and Agreements 1 2010-01-01 2010-01-01 false Referral. 175.20 Section 175.20 Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING IN PERSONS § 175.20 Referral. An agency official should inform the...

  20. 2 CFR 175.10 - Statutory requirement.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2 Grants and Agreements 1 2010-01-01 2010-01-01 false Statutory requirement. 175.10 Section 175.10 Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING IN PERSONS § 175.10 Statutory requirement. In each agency award...

  1. Charge transfer emission of ytterbium-doped oxyborates.

    PubMed

    Sablayrolles, J; Jubera, V; Guillen, F; Garcia, A

    2008-03-01

    The ultraviolet spectroscopic properties of trivalent ytterbium have been studied at low temperature in one borate and two oxyborates in the ternary diagram Li(2)O-Y(2)O(3)-B(2)O(3). The UV luminescence was detected in the two ytterbium-doped oxyborates. The evolution of these emissions was studied as a function of the temperature. A determination of the configurational coordinate diagrams based on the Struck and Fonger model is proposed to calculate the position in energy of the charge transfer band afforded by the simulation of spectral distribution of these excitation and emission bands. The strong correlation between the luminescent properties and the environments of the rare earth is pointed out. PMID:17644400

  2. Kinetic Monte Carlo Simulation of Oxygen Diffusion in Ytterbium Disilicate

    NASA Astrophysics Data System (ADS)

    Good, Brian

    2015-03-01

    Ytterbium disilicate is of interest as a potential environmental barrier coating for aerospace applications, notably for use in next generation jet turbine engines. In such applications, the diffusion of oxygen and water vapor through these coatings is undesirable if high temperature corrosion is to be avoided. In an effort to understand the diffusion process in these materials, we have performed kinetic Monte Carlo simulations of vacancy-mediated oxygen diffusion in Ytterbium Disilicate. Oxygen vacancy site energies and diffusion barrier energies are computed using Density Functional Theory. We find that many potential diffusion paths involve large barrier energies, but some paths have barrier energies smaller than one electron volt. However, computed vacancy formation energies suggest that the intrinsic vacancy concentration is small in the pure material, with the result that the material is unlikely to exhibit significant oxygen permeability.

  3. Low frequency noise distributed-feedback ytterbium fibre laser

    SciTech Connect

    Nikulin, M A; Babin, S A; Kablukov, S I; Dmitriev, Aleksandr K; Dychkov, Aleksandr S; Lugovoy, Aleksei A; Pecherskii, Yu Ya

    2009-10-31

    We report a single-frequency 1-W fibre laser source emitting at 1093 nm, composed of a distributed-feedback ytterbium fibre laser and fibre-optic amplifier. The laser frequency was stabilised by side-locking to a transmission peak of a Fabry - Perot interferometer, and the residual frequency noise spectrum of the laser was measured. Our results indicate that the laser linewidth can be narrowed down below 1 kHz. (lasers)

  4. Luminescence and photoinduced absorption in ytterbium-doped optical fibres

    NASA Astrophysics Data System (ADS)

    Rybaltovsky, A. A.; Aleshkina, S. S.; Likhachev, M. E.; Bubnov, M. M.; Umnikov, A. A.; Yashkov, M. V.; Gur'yanov, Aleksei N.; Dianov, Evgenii M.

    2011-12-01

    Photochemical reactions induced in the glass network of an ytterbium-doped fibre core by IR laser pumping and UV irradiation have been investigated by analysing absorption and luminescence spectra. We have performed comparative studies of the photoinduced absorption and luminescence spectra of fibre preforms differing in core glass composition: Al2O3 : SiO2, Al2O3 : Yb2O3 : SiO2, and P2O5 : Yb2O3 : SiO2. The UV absorption spectra of unirradiated preform core samples show strong bands peaking at 5.1 and 6.5 eV, whose excitation plays a key role in photoinduced colour centre generation in the glass network. 'Direct' UV excitation of the 5.1- and 6.5-eV absorption bands at 244 and 193 nm leads to the reduction of some of the Yb3+ ions to Yb2+. The photodarkening of ytterbium-doped fibres by IR pumping is shown to result from oxygen hole centre generation. A phenomenological model is proposed for the IR-pumping-induced photodarkening of ytterbium-doped fibres. The model predicts that colour centre generation in the core glass network and the associated absorption in the visible range result from a cooperative effect involving simultaneous excitation of a cluster composed of several closely spaced Yb3+ ions.

  5. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs... Direct Addition or Use as Human Food § 189.175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  6. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs... Direct Addition or Use as Human Food § 189.175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  7. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs....175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n-propoxyaniline, C9H12N2O3. It is a synthetic... containing any added or detectable level of P-4000 is deemed to be adulterated in violation of the act...

  8. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false P-4000. 189.175 Section 189.175 Food and Drugs... Direct Addition or Use as Human Food § 189.175 P-4000. (a) P-4000 is the chemical 5-nitro-2-n... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  9. 21 CFR 169.175 - Vanilla extract.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Vanilla extract. 169.175 Section 169.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION FOOD DRESSINGS AND FLAVORINGS Requirements for Specific Standardized Food Dressings and...

  10. 40 CFR 161.175 - Certified limits.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 25 2013-07-01 2013-07-01 false Certified limits. 161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements §...

  11. 40 CFR 161.175 - Certified limits.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 24 2011-07-01 2011-07-01 false Certified limits. 161.175 Section 161.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PESTICIDE PROGRAMS DATA REQUIREMENTS FOR REGISTRATION OF ANTIMICROBIAL PESTICIDES Product Chemistry Data Requirements §...

  12. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Adhesives. 175.105 Section 175.105 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives §...

  13. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Adhesives. 175.105 Section 175.105 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives §...

  14. 40 CFR 61.175 - Monitoring requirements.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... Specification 1 of appendix B of 40 CFR part 60. (2) Comply with the provisions of § 60.13(d) of 40 CFR part 60... 40 Protection of Environment 9 2014-07-01 2014-07-01 false Monitoring requirements. 61.175 Section... Emissions From Primary Copper Smelters § 61.175 Monitoring requirements. (a) Each owner or operator of...

  15. 40 CFR 61.175 - Monitoring requirements.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... Specification 1 of appendix B of 40 CFR part 60. (2) Comply with the provisions of § 60.13(d) of 40 CFR part 60... 40 Protection of Environment 9 2012-07-01 2012-07-01 false Monitoring requirements. 61.175 Section... Emissions From Primary Copper Smelters § 61.175 Monitoring requirements. (a) Each owner or operator of...

  16. 40 CFR 61.175 - Monitoring requirements.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... Specification 1 of appendix B of 40 CFR part 60. (2) Comply with the provisions of § 60.13(d) of 40 CFR part 60... 40 Protection of Environment 9 2013-07-01 2013-07-01 false Monitoring requirements. 61.175 Section... Emissions From Primary Copper Smelters § 61.175 Monitoring requirements. (a) Each owner or operator of...

  17. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  18. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 1 2012-07-01 2012-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  19. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 1 2013-07-01 2013-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  20. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  1. 33 CFR 117.175 - Mokelumne River.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 1 2014-07-01 2014-07-01 false Mokelumne River. 117.175 Section... DRAWBRIDGE OPERATION REGULATIONS Specific Requirements California § 117.175 Mokelumne River. (a) The draw of the California Department of Transportation highway bridge, the Mokelumne River Bridge, mile 3.0,...

  2. 25 CFR 175.24 - Utility responsibilities.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... accordance with accepted industry practice; (c) Exercise reasonable care in protecting...

  3. 24 CFR 35.175 - Records.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 24 Housing and Urban Development 1 2012-04-01 2012-04-01 false Records. 35.175 Section 35.175 Housing and Urban Development Office of the Secretary, Department of Housing and Urban Development LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES General Lead-Based Paint Requirements and Definitions for All Programs. §...

  4. 24 CFR 35.175 - Records.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 24 Housing and Urban Development 1 2014-04-01 2014-04-01 false Records. 35.175 Section 35.175 Housing and Urban Development Office of the Secretary, Department of Housing and Urban Development LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES General Lead-Based Paint Requirements and Definitions for All Programs. §...

  5. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2012-10-01 2012-10-01 false Plutonium shipments. 175.704 Section...

  6. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2014-10-01 2014-10-01 false Plutonium shipments. 175.704 Section...

  7. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2013-10-01 2013-10-01 false Plutonium shipments. 175.704 Section...

  8. 25 CFR 175.24 - Utility responsibilities.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... manual, service agreement, or special contract, except in those situations where the meter cannot be...

  9. 7 CFR 1.75 - General stipulations.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 1 2013-01-01 2013-01-01 false General stipulations. 1.75 Section 1.75 Agriculture Office of the Secretary of Agriculture ADMINISTRATIVE REGULATIONS Cooperative Production of Television... direct or implied, by the U.S. Department of Agriculture or its agencies, of the sponsor's product....

  10. 2 CFR 175.10 - Statutory requirement.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Statutory requirement. 175.10 Section 175.10 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS AWARD TERM FOR TRAFFICKING IN...

  11. 21 CFR 189.175 - P-4000.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true P-4000. 189.175 Section 189.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN... for use as an artificial sweetener. (b) Food containing any added or detectable level of P-4000...

  12. 49 CFR 173.175 - Permeation devices.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false Permeation devices. 173.175 Section 173.175... Permeation devices. Permeation devices that contain hazardous materials and that are used for calibrating air... ounces) and the device must not be liquid full at 55 °C (131 °F); (c) Each permeation device must...

  13. 49 CFR 173.175 - Permeation devices.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 2 2012-10-01 2012-10-01 false Permeation devices. 173.175 Section 173.175... Permeation devices. Permeation devices that contain hazardous materials and that are used for calibrating air... ounces) and the device must not be liquid full at 55 °C (131 °F); (c) Each permeation device must...

  14. 49 CFR 173.175 - Permeation devices.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 2 2013-10-01 2013-10-01 false Permeation devices. 173.175 Section 173.175... Permeation devices. Permeation devices that contain hazardous materials and that are used for calibrating air... ounces) and the device must not be liquid full at 55 °C (131 °F); (c) Each permeation device must...

  15. 25 CFR 175.23 - Customer responsibilities.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Customer responsibilities. 175.23 Section 175.23 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... without the express permission of the utility; (e) Not allow the unauthorized-use of electricity; and...

  16. 25 CFR 175.23 - Customer responsibilities.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Customer responsibilities. 175.23 Section 175.23 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... without the express permission of the utility; (e) Not allow the unauthorized-use of electricity; and...

  17. 25 CFR 175.23 - Customer responsibilities.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Customer responsibilities. 175.23 Section 175.23 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... without the express permission of the utility; (e) Not allow the unauthorized-use of electricity; and...

  18. 25 CFR 175.24 - Utility responsibilities.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... utility, is an unsafe condition; and (g) Not allow the unauthorized use of electricity....

  19. 25 CFR 175.23 - Customer responsibilities.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Customer responsibilities. 175.23 Section 175.23 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... without the express permission of the utility; (e) Not allow the unauthorized-use of electricity; and...

  20. 25 CFR 175.24 - Utility responsibilities.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Utility responsibilities. 175.24 Section 175.24 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES... utility, is an unsafe condition; and (g) Not allow the unauthorized use of electricity....

  1. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2010-10-01 2010-10-01 false Plutonium shipments. 175.704 Section...

  2. 49 CFR 175.704 - Plutonium shipments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Regulations Applicable According to Classification of Material § 175.704 Plutonium shipments. Shipments of plutonium which are subject to 10 CFR 71.88(a)(4) must comply with the following: (a) Each package... 49 Transportation 2 2011-10-01 2011-10-01 false Plutonium shipments. 175.704 Section...

  3. Observation of a Large Atomic Parity Violation Effect in Ytterbium

    NASA Astrophysics Data System (ADS)

    Tsigutkin, K.; Dounas-Frazer, D.; Family, A.; Stalnaker, J. E.; Yashchuk, V. V.; Budker, D.

    2009-08-01

    Atomic parity violation has been observed in the 6s2S01→5d6sD13 408-nm forbidden transition of ytterbium. The parity-violating amplitude is found to be 2 orders of magnitude larger than in cesium, where the most precise experiments to date have been performed. This is in accordance with theoretical predictions and constitutes the largest atomic parity-violating amplitude yet observed. This also opens the way to future measurements of neutron distributions and anapole moments by comparing parity-violating amplitudes for various isotopes and hyperfine components of the transition.

  4. Crystal structure of hexa-aqua-dichlorido-ytterbium(III) chloride.

    PubMed

    Knopf, Kevin M; Crundwell, Guy; Westcott, Barry L

    2015-06-01

    The crystal structure of the title compound, [YbCl2(H2O)6]Cl, was determined at 110 K. Samples were obtained from evaporated aceto-nitrile solutions containing the title compound, which consists of a [YbCl2(H2O)6](+) cation and a Cl(-) anion. The cations in the title compound sit on a twofold axis and form O-H⋯Cl hydrogen bonds with the nearby Cl(-) anion. The coordination geometry around the metal centre forms a distorted square anti-prism. The ytterbium complex is isotypic with the europium complex [Tambrornino et al. (2014 ▶). Acta Cryst. E70, i27]. PMID:26090164

  5. Waveguide lasers in ytterbium-doped tantalum pentoxide on silicon.

    PubMed

    Aghajani, A; Murugan, G S; Sessions, N P; Apostolopoulos, V; Wilkinson, J S

    2015-06-01

    A waveguide laser in an ytterbium-doped tantalum pentoxide film is reported. The waveguide is formed of a rib of sputtered tantalum pentoxide on top of oxidized silicon with an over-cladding of silica. Emission at a wavelength of 1025 nm was achieved with an absorbed pump power threshold and slope efficiency of ≈29  mW and 27%, respectively, for a cavity formed by a high reflector mirror and an estimated 12% Fresnel reflection from the bare end-face at the output. PMID:26030554

  6. Optimierung und Charakterisierung einer transportablen optischen Gitteruhr mit Ytterbium

    NASA Astrophysics Data System (ADS)

    Mura, Gregor

    2015-08-01

    This thesis deals with the improvement and the characterization of a transportable optical lattice clock with ytterbium. Building on results of former theses from T. Franzen [1] and C. Abou Jadoudeh [2] numerous improvements were needed to increase the overall stability of the whole apparatus. The improved stability should lead to a more accurate characterization of the system and a better mobility. Finally, the apparatus should be transported to the Instituto Nationale di Ricerca Metrologica (INRIM) in Torino (Italy) in the course of the Space Optical Clocks 2 (SOC2) project.(Abridged)

  7. Kinetic Monte Carlo Simulation of Oxygen Diffusion in Ytterbium Disilicate

    NASA Technical Reports Server (NTRS)

    Good, Brian S.

    2015-01-01

    Ytterbium disilicate is of interest as a potential environmental barrier coating for aerospace applications, notably for use in next generation jet turbine engines. In such applications, the transport of oxygen and water vapor through these coatings to the ceramic substrate is undesirable if high temperature oxidation is to be avoided. In an effort to understand the diffusion process in these materials, we have performed kinetic Monte Carlo simulations of vacancy-mediated and interstitial oxygen diffusion in Ytterbium disilicate. Oxygen vacancy and interstitial site energies, vacancy and interstitial formation energies, and migration barrier energies were computed using Density Functional Theory. We have found that, in the case of vacancy-mediated diffusion, many potential diffusion paths involve large barrier energies, but some paths have barrier energies smaller than one electron volt. However, computed vacancy formation energies suggest that the intrinsic vacancy concentration is small. In the case of interstitial diffusion, migration barrier energies are typically around one electron volt, but the interstitial defect formation energies are positive, with the result that the disilicate is unlikely to exhibit experience significant oxygen permeability except at very high temperature.

  8. Quantum degenerate mixture of ytterbium and lithium atoms

    SciTech Connect

    Hansen, Anders H.; Khramov, Alexander; Dowd, William H.; Jamison, Alan O.; Ivanov, Vladyslav V.; Gupta, Subhadeep

    2011-07-15

    We have produced a quantum degenerate mixture of fermionic alkali-metal {sup 6}Li and bosonic spin-singlet {sup 174}Yb gases. This was achieved using sympathetic cooling of lithium atoms by evaporatively cooled ytterbium atoms in a far-off-resonant optical dipole trap. We observe the coexistence of Bose-condensed (T/T{sub c}{approx_equal}0.8) {sup 174}Yb with 2.3x10{sup 4} atoms and Fermi degenerate (T/T{sub F}{approx_equal}0.3) {sup 6}Li with 1.2x10{sup 4} atoms. Quasipure Bose-Einstein condensates of up to 3x10{sup 4} {sup 174}Yb atoms can be produced in single-species experiments. Our results mark a significant step toward studies of few- and many-body physics with mixtures of alkali-metal and alkaline-earth-metal-like atoms, and for the production of paramagnetic polar molecules in the quantum regime. Our methods also establish a convenient scheme for producing quantum degenerate ytterbium atoms in a 1064 nm optical dipole trap.

  9. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee...

  10. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee...

  11. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee...

  12. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee...

  13. 43 CFR 17.5 - Compliance information.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... PROGRAMS OF THE DEPARTMENT OF THE INTERIOR Nondiscrimination on the Basis of Race, Color, or National Origin § 17.5 Compliance information. (a) Cooperation and assistance. The Secretary or his designee...

  14. Mechanism of spontaneous switching of polarisation in an ytterbium-doped fibre laser

    SciTech Connect

    Voronin, V G; Sya, Ya V; Nanii, Oleg E; Khlystov, V I

    2007-04-30

    The regime of polarisation switching in a double-clad ytterbium fibre laser is studied experimentally and explained theoretically. It is shown that polarisation switching appears in lasers with the long active medium (no less than 20 m) when the pump slightly exceeds the threshold. The experimentally observed properties of spontaneous polarisation switching in the ytterbium fibre laser are explained by the competition of modes with orthogonal polarisations taking into account the polarisation-dependent saturation of amplification and losses. (fibre lasers)

  15. Atomic layer deposition for fabrication of ytterbium doped fibers

    NASA Astrophysics Data System (ADS)

    Montiel i Ponsoda, Joan J.; Norin, Lars; Bosund, Markus; Ye, Changgeng; Söderlund, Mikko J.; Tervonen, Ari; Honkanen, Seppo

    2012-02-01

    Atomic layer deposition (ALD) was used to fabricate an ytterbium (Yb)-doped silica fiber in combination with the conventional modified chemical vapor deposition (MCVD) method. An MCVD soot-preform with a porous layer of SiO2 doped with GeO2 was coated with layers of Yb2O3 and Al2O3 prior to sintering, using the ALD method. ALD is a surface controlled CVD-type process enabling thin film deposition over large substrates with good thickness control, uniformity and high conformality. A materials analysis study showed that the dopants successfully penetrated the full thickness of 320 μm of the soot layer. Preliminary preform and fiber experiments on refractive index profiles, background losses, lifetime and the characteristic gain-loss curve were performed demonstrating the potential of this method for fabricating Yb-doped fibers with high concentration of dopants.

  16. Optical properties of ZnSe(Te) with ytterbium impurity.

    PubMed

    Makhniy, Viktor P; Horley, Paul P; Vorobiev, Yuri V; Kinzerska, Oksana V

    2016-04-20

    We report the results on infrared transmission measurements of non-doped and tellurium-doped crystals of zinc selenide grown from the melt. It was found that non-doped samples feature high transmission (50%-60%) for the wavelengths of 1-22 μm. The efficient scintillating crystals of ZnSe(Te) are almost opaque for λ>7  μm. Doping these samples with ytterbium from the gas phase does not achieve any significant transmission increase for non-doped ZnSe samples in the spectral range of 1-22 μm. However, it considerably increases (up to 50%) transmission for doped ZnSe(Te) at the wavelengths λ>10  μm. These optical peculiarities were analyzed taking into account restructurization of point defect ensembles created by Te and Yb impurities. PMID:27140112

  17. Structural and Electronic Transitions in Ytterbium Metal to 202 GPa

    SciTech Connect

    Chesnut, G.N.; Vohra, Y.K.

    1999-02-01

    Ytterbium (Yb), a member of the rare earth group metals with a filled f shell and a divalent electronic character, has been studied under static high pressures in a diamond anvil cell to 202thinspthinspGPa. We report a new transformation from a face-centered-cubic structure to a hexagonal phase with 3thinspthinspatoms/cell (space group P3{sub 1}21 referred to as hP3 ) at 98{plus_minus}5 GPa . This hP3 phase is similar to that observed in trivalent neodymium and samarium at pressures near 40thinspthinspGPa. Our high pressure study thus clearly demonstrates that Yb is no longer an {open_quotes}irregular{close_quotes} member of the rare earth metals, and divalent to trivalent electronic transition is completed at megabar pressures. {copyright} {ital 1999} {ital The American Physical Society}

  18. Passive mode locking in erbium-ytterbium fiber lasers

    NASA Astrophysics Data System (ADS)

    Thai, Serey; Hayduk, Michael J.

    1999-11-01

    A novel mode-locked erbium-ytterbium fiber laser operating at 1550 nm using multiple quantum well (MQW) saturable absorbers was developed. The laser was constructed in a Fabry-Perot configuration using a fiber Bragg grating as a front reflector and a fiber Bragg grating output as a back reflector of the laser cavity. The passive mode-locking element placed inside the laser cavity is a 75 period InGaAs/InAlAs MQW saturable absorber grown lattice matched on an InP substrate. The output of the laser was taken through the other available port of a wavelength-division demultiplexer. The laser produced mode-locked output pulse trains at 16.67-MHz repetition rate and 10 mW of average output power.

  19. Synthesis of Titanium Oxide Nanoparticles by Ytterbium Fiber Laser Ablation

    NASA Astrophysics Data System (ADS)

    Boutinguiza, M.; del Val, J.; Riveiro, A.; Lusquiños, F.; Quintero, F.; Comesaña, R.; Pou, J.

    Nanosized titanium particles have recently received a special attention due to their applications in many different fields, such as catalysis, biomedical engineering, etc. Pulsed laser ablation in liquid media allows obtaining metallic and metallic oxide nanoparticles in colloids. This technique has been used in the present work to prepare titanium colloids from a solid piece immersed in liquid media. A monomode Ytterbium doped fiber laser has been focused onto the upper surface of the titanium target in de-ionized water or ethanol. Crystalline phases, morphology and optical properties of the obtained colloidal nanoparticles were characterized by XRD, HRTEM, and UV/VIS absorption spectroscopy. The produced titanium oxide crystalline nanoparticles show spherical shape and are polycrystalline, exhibiting anatase as well as rutile phases.

  20. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... § 175.105, see the List of CFR Sections Affected, which appears in the Finding Aids section of the... Diethylene glycol laurate Diethylene glycol monobutyl ether Diethylene glycol monobutyl ether acetate Diethylene glycol monoethyl ether Diethylene glycol monoethyl ether acetate Diethylene glycol...

  1. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... § 175.105, see the List of CFR Sections Affected, which appears in the Finding Aids section of the... Diethylene glycol laurate Diethylene glycol monobutyl ether Diethylene glycol monobutyl ether acetate Diethylene glycol monoethyl ether Diethylene glycol monoethyl ether acetate Diethylene glycol...

  2. 21 CFR 175.105 - Adhesives.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... § 175.105, see the List of CFR Sections Affected, which appears in the Finding Aids section of the... Diethylene glycol laurate Diethylene glycol monobutyl ether Diethylene glycol monobutyl ether acetate Diethylene glycol monoethyl ether Diethylene glycol monoethyl ether acetate Diethylene glycol...

  3. 49 CFR 175.90 - Damaged shipments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... unit load device was stowed must be inspected for evidence of leakage or contamination immediately upon... for contamination and decontaminated, if applicable. (b) Except as provided in § 175.700, the operator... that a hazardous material may be the cause of the contamination, the operator must take...

  4. 31 CFR 103.175 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... REPORTING OF CURRENCY AND FOREIGN TRANSACTIONS Anti-Money Laundering Programs Special Due Diligence for...-money laundering program requirement; (viii) A broker or dealer in securities registered, or required to... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Definitions. 103.175 Section...

  5. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide... of an individual to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies... entity, as those terms are defined in 2 CFR 175.25. ii. Includes: A. A nonprofit organization,...

  6. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... conduct of an individual to an organization that are provided in 2 CFR part 180, “OMB Guidelines to... imputing the conduct of an individual to an organization that are provided in 2 CFR part 180, “OMB... tribe, or foreign public entity, as those terms are defined in 2 CFR 175.25. ii. Includes: A....

  7. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide... of an individual to an organization that are provided in 2 CFR part 180, “OMB Guidelines to Agencies... entity, as those terms are defined in 2 CFR 175.25. ii. Includes: A. A nonprofit organization,...

  8. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... conduct of an individual to an organization that are provided in 2 CFR part 180, “OMB Guidelines to... imputing the conduct of an individual to an organization that are provided in 2 CFR part 180, “OMB... tribe, or foreign public entity, as those terms are defined in 2 CFR 175.25. ii. Includes: A....

  9. 21 CFR 175.250 - Paraffin (synthetic).

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.250 Paraffin (synthetic). Synthetic paraffin may be safely used as an impregnant in, coating on, or component of coatings on articles used in...

  10. 46 CFR 175.540 - Equivalents.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... IMO Resolution A. 520(13) (incorporated by reference, see 46 CFR 175.600); or (2) Has successfully... submitted to the Marine Safety Center via the cognizant OCMI. If necessary, the Marine Safety Center may... submitted to the Marine Safety Center via the cognizant OCMI. (c) The Commandant may approve a...

  11. 46 CFR 175.540 - Equivalents.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... IMO Resolution A. 520(13) (incorporated by reference, see 46 CFR 175.600); or (2) Has successfully... submitted to the Marine Safety Center via the cognizant OCMI. If necessary, the Marine Safety Center may... submitted to the Marine Safety Center via the cognizant OCMI. (c) The Commandant may approve a...

  12. 46 CFR 175.540 - Equivalents.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... IMO Resolution A. 520(13) (incorporated by reference, see 46 CFR 175.600); or (2) Has successfully... submitted to the Marine Safety Center via the cognizant OCMI. If necessary, the Marine Safety Center may... submitted to the Marine Safety Center via the cognizant OCMI. (c) The Commandant may approve a...

  13. 27 CFR 24.175 - General.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... TREASURY LIQUORS WINE Production of Wine § 24.175 General. The kinds of wine which may be produced on bonded wine premises are as follows: (a) Natural wine produced in accordance with subparts F and G of this part; (b) Special natural wine produced in accordance with subpart H of this part;...

  14. 2 CFR 175.15 - Award term.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide Debarment and Suspension... that are provided in 2 CFR part 180, “OMB Guidelines to Agencies on Governmentwide Debarment and... defined in 2 CFR 175.25. ii. Includes: A. A nonprofit organization, including any nonprofit institution...

  15. 21 CFR 175.250 - Paraffin (synthetic).

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.250 Paraffin (synthetic). Synthetic paraffin may be safely used as an impregnant in, coating on, or component of coatings on articles used in...

  16. 21 CFR 175.250 - Paraffin (synthetic).

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.250 Paraffin (synthetic). Synthetic paraffin may be safely used as an impregnant in, coating on, or component of coatings on articles used in...

  17. 21 CFR 175.250 - Paraffin (synthetic).

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.250 Paraffin (synthetic). Synthetic paraffin may be safely used as an impregnant in, coating on, or component of coatings on articles used in producing, manufacturing, packing, processing, preparing,...

  18. 21 CFR 175.250 - Paraffin (synthetic).

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.250 Paraffin (synthetic). Synthetic paraffin may be safely used as an impregnant in, coating on, or component of coatings on articles used in...

  19. Parity violation in atomic ytterbium: Experimental sensitivity and systematics

    NASA Astrophysics Data System (ADS)

    Tsigutkin, K.; Dounas-Frazer, D.; Family, A.; Stalnaker, J. E.; Yashchuk, V. V.; Budker, D.

    2010-03-01

    We present a detailed description of the observation of parity violation in the 1S0-3D1 408-nm forbidden transition of ytterbium, a brief report of which appeared earlier. Linearly polarized 408-nm light interacts with Yb atoms in crossed E and B fields. The probability of the 408-nm transition contains a parity-violating term, proportional to (ℰ·B)[(E×ℰ)·B], arising from interference between the parity-violating amplitude and the Stark amplitude due to the E field (ℰ is the electric field of the light). The transition probability is detected by measuring the population of the 3P0 state, to which 65% of the atoms excited to the 3D1 state spontaneously decay. The population of the 3P0 state is determined by resonantly exciting the atoms with 649-nm light to the 6s7s3S1 state and collecting the fluorescence resulting from its decay. Systematic corrections due to E-field and B-field imperfections are determined in auxiliary experiments. The statistical uncertainty is dominated by parasitic frequency excursions of the 408-nm excitation light due to the imperfect stabilization of the optical reference with respect to the atomic resonance. The present uncertainties are 9% statistical and 8% systematic. Methods of improving the accuracy for future experiments are discussed.

  20. Contamination of YBCO bulk superconductors by samarium and ytterbium

    NASA Astrophysics Data System (ADS)

    Volochova, D.; Jurek, K.; Radusovska, M.; Piovarci, S.; Antal, V.; Kovac, J.; Jirsa, M.; Diko, P.

    2014-01-01

    Y-Ba-Cu-O (YBCO, Y-123) single-grain bulk superconductors with a nominal composition Y1.5Ba2Cu3Ox and 1 wt% CeO2 addition were prepared by the optimized Top-Seeded Melt-Growth process. Small single-crystalline pieces cut from the SmBa2Cu3Oy (Sm-123) bulk were used for seeding of epitaxial growth. Wavelength-dispersive spectrometry (WDS) confirmed that prepared samples contain besides samarium from the seed also ytterbium from the substrate. The influence of maximum melting temperature, Tmax and dwell time on the contamination of the bulk samples was studied. Y2BaCuO5 (Y-211) barriers against samarium diffusion from the seed to melted sample were tested. Using a NdBa2Cu3Oz (Nd-123) seed and a combination of Y2O3 and Yb2O3 substrate led to a high critical temperature (Tc(50%) = 91.54 K) of prepared sample.

  1. Kinetic Monte Carlo Simulation of Oxygen Diffusion in Ytterbium Disilicate

    NASA Technical Reports Server (NTRS)

    Good, Brian S.

    2015-01-01

    Silicon-based ceramic components for next-generation jet turbine engines offer potential weight savings, as well as higher operating temperatures, both of which lead to increased efficiency and lower fuel costs. Silicon carbide (SiC), in particular, offers low density, good strength at high temperatures, and good oxidation resistance in dry air. However, reaction of SiC with high-temperature water vapor, as found in the hot section of jet turbine engines in operation, can cause rapid surface recession, which limits the lifetime of such components. Environmental Barrier Coatings (EBCs) are therefore needed if long component lifetime is to be achieved. Rare earth silicates such as Yb2Si2O7 and Yb2SiO5 have been proposed for such applications; in an effort to better understand diffusion in such materials, we have performed kinetic Monte Carlo (kMC) simulations of oxygen diffusion in Ytterbium disilicate, Yb2- Si2O7. The diffusive process is assumed to take place via the thermally activated hopping of oxygen atoms among oxygen vacancy sites or among interstitial sites. Migration barrier energies are computed using density functional theory (DFT).

  2. Atomic Parity Violation and Related Physics in Ytterbium

    NASA Astrophysics Data System (ADS)

    Dounas-Frazer, Dimitri Robert

    Atomic parity violation has been observed in the 408 nm 1 S0→3D1 forbidden transition of ytterbium. The parity violating amplitude is 8.7(1.4)e-10 ea0, two orders of magnitude larger than in cesium, where the most precise experiments to date have been performed. This is in accordance with theoretical predictions and constitutes the largest atomic parity violating amplitude yet observed. This also opens the way to future measurements of neutron skins and anapole moments by comparing parity-violating amplitudes for various isotopes and hyperfine components of the transition. We present a detailed description of the observation. Linearly polarized 408 nm light interacts with ytterbium atoms in crossed electric (E) and magnetic fields (B). The probability of the 1 S0→3D1 transition contains a parity-violating term, proportional to E'B[( E'xE B], arising from interference between the amplitudes of transitions induced by the electroweak interaction and the Stark effect ((E' is the optical electric field). The transition probability is detected by measuring the population of the metastable 3P0 state, to which 65% of the atoms excited to the 3D1 state spontaneously decay. The population of the 3P0 state is determined by resonantly exciting the atoms with 649 nm light to the 3S1 state and collecting the fluorescence resulting from its decay. Systematic corrections due to imperfections in the applied electric and magnetic fields are determined in auxiliary experiments. The statistical uncertainty is dominated by parasitic frequency excursions of the 408-nm excitation light due to imperfect stabilization of the optical reference with respect to the atomic resonance. The present uncertainties are 9% statistical and 8% systematic. Methods of improving the accuracy for the future experiments are discussed. We further present a measurement of the dynamic scalar and tensor polarizabilities of ytterbium's 3D1 state. The polarizabilities were measured by analyzing the spectral lineshape of the 1 S0→3D1 transition. Due to the interaction of atoms with the standing wave, the lineshape has a characteristic polarizability-dependent distortion. A theoretical model was used to simulate the lineshape and determine a combination of the polarizabilities of the ground and excited states by fitting the model to experimental data. This combination was measured with a 13% uncertainty, only 3% of which is due to uncertainty in the simulation and fitting procedure. By comparing two different combinations of polarizabilities, the scalar and tensor polarizabilities of the state 3D1 were measured to be 0.151(36) Hz/(V/cm)2 and -0.205(53) Hz/(V/cm)2, respectively. We showthat this technique can be applied to similar atomic systems. →Finally, we propose two methods for improving future measurements of atomic parity violation using two-photon transitions. The first method is characterized by the absence of static external electric and magnetic fields. Such measurements can be achieved by observing the interference of parity-conserving and parity-violating two-photon transition amplitudes between energy eigenstates of zero electronic angular momentum. General expressions for induced two-photon transition amplitudes are derived. The two-photon scheme using the 1S0→1P1→3 P0 transition in ytterbium (399 nm and 1280 nm) is proposed as a crosscheck of the APV experiment which uses the single-photon 408 nm 1S0→3D 1 transition. We estimate that the signal-to-noise ratio of the proposed experiment is comparable to that achieved in the 408 nm system. The second method allows for measurement of nuclear spin dependent atomic parity violation without nuclear spin independent background. Such measurements can be achieved by driving parity violating two-photon J= 0→1 transitions driven by identical photons in the presence of an external static magnetic field. We discuss two promising applications: the 462 nm 5s2 1S0→5s9p 1P1transition in strontium-87, and the 741 nm 7s2 1S0→7s7p 3P1 transition in unstable radium-225.

  3. Ytterbium optical lattice clock with 10-18 level characterization

    NASA Astrophysics Data System (ADS)

    Phillips, Nathaniel; Sherman, Jeff; Beloy, Kyle; Hinkley, Nathan; Schioppo, Marco; Oates, Chris; Ludlow, Andrew

    2014-05-01

    A recent comparison of two ytterbium-based optical lattice clocks at NIST demonstrated record stability of 1 . 6 parts in 1018 after 25,000s averaging. We report on measurements of the two primary systematic effects that shift the ultra-narrow clock transition, towards a reduction of the clock uncertainty to the 10-18 level. Uncertainty stemming from the blackbody radiation (BBR) shift is largely due to imprecise knowledge of the thermal environment surrounding the atoms. We detail the construction and operation of an in-vacuum, thermally-regulated radiation shield, which permits laser cooling and trapping while enabling an absolute temperature measurement with < 20 mK precision. Additionally, while operation of the optical lattice at the magic wavelength (λm) cancels the scalar Stark shift (since both clock states shift equally), higher-order vector and two-photon hyperpolarizability shifts remain. To evaluate these effects, as well as the polarizability away from λm, we implement a lattice buildup cavity around the atoms. The resulting twenty-fold enhancement of the lattice intensity provides a significant lever arm for precise measurement of these effects.

  4. Ytterbium-doped glass-ceramics for optical refrigeration.

    PubMed

    Filho, Elton Soares de Lima; Krishnaiah, Kummara Venkata; Ledemi, Yannick; Yu, Ye-Jin; Messaddeq, Younes; Nemova, Galina; Kashyap, Raman

    2015-02-23

    We report for the first time the characterization of glass-ceramics for optical refrigeration. Ytterbium-doped nanocrystallites were grown in an oxyfluoride glass matrix of composition 2YbF(3):30SiO(2)-15Al(2)O(3)-25CdF(2)-22PbF(2)-4YF(3), forming bulk glass-ceramics at three different crystalisation levels. The samples are compared with a corresponding uncrystalised (glass) sample, as well as a Yb:YAG sample which has presented optical cooling. The measured X-ray diffraction spectra, and thermal capacities of the samples are reported. We also report for the first time the use of Yb:YAG as a reference for absolute photometric quantum efficiency measurement, and use the same setup to characterize the glass and glass-ceramic samples. The cooling figure-of-merit was measured by optical calorimetry using a fiber Bragg grating and found to depend on the level of crystallization of the sample, and that samples with nanocrystallites result in higher quantum efficiency and lower background absorption than the pure-glass sample. In addition to laser-induced cooling, the glass-ceramics have the potential to serve as a reference for quantum efficiency measurements. PMID:25836500

  5. 175Hp contrarotating homopolar motor design report

    NASA Astrophysics Data System (ADS)

    Cannell, Michael J.; Drake, John L.; McConnell, Richard A.; Martino, William R.

    1994-06-01

    A normally conducting contrarotating homopolar motor has been designed and constructed. The reaction torque, in the outer rotor, from the inner rotor is utilized to produce true contrarotation. The machine utilizes liquid cooled conductors, high performance liquid metal current collectors, and ferrous conductors in the active region. The basic machine output is 175 hp at + or - 1,200 rpm with an input of 4 volts and 35,000 amps.

  6. Investigation on chaotic dynamics of ytterbium-doped fiber laser with Mach-Zehnder interferometer

    NASA Astrophysics Data System (ADS)

    Zhang, Li; Yang, Lingzhen; Wang, Feifei; Cui, Liqin; Qin, Jianmin

    2016-01-01

    Chaotic dynamics are observed experimentally from an ytterbium-doped fiber laser when the polarization controller is adjusted to an appropriate position and the pump power is increased. But chaotic signals hide the cavity-length signature of ytterbium-doped fiber laser and the cavity-length can be identified by the sidelobes of chaotic autocorrelation. The perturbation of variable optical attenuator inserted to the ytterbium-doped fiber laser and the interference effect induced by the optical path difference (OPD) of a fiber optical Mach-Zehnder interferometer (MZI) are adopted to investigate the chaotic dynamics. The results show that such sidelobes can be completely suppressed by exerting the perturbation and by the interference effect of MZI with optimum OPD which is demonstrated theoretically and experimentally. Moreover, the optimum OPD corresponding to the delay-time of MZI is intimately related to the relaxation oscillation period.

  7. The crystal structure of ytterbium diiodide monohydrate by X-ray powder diffraction

    SciTech Connect

    Lasocha, W.

    1995-02-01

    The crystal structure of the ytterbium diiodide monohydrate was determined by the X-ray powder diffraction method. Ytterbium atoms are octahedrally coordinated by five iodine atoms and one oxygen atom; space group: Pnma (62); lattice parameters: a = 10.4792(7), b = 4.5138(3), c = 13.0602(9) {angstrom}. Rietveld refinement of a mixture of ytterbium diiodide hydrate and a silicon standard results in the discrepancy factors R{sub B} = 8.04, R{sub wp} = 9.17%. The powder pattern previously reported for YbI{sub 2}{center_dot}2H{sub 2}O is shown to be identical to that of YbI{sub 2}{center_dot}H{sub 2}O.

  8. Multi-wavelength ytterbium doped fiber laser based on longitudinal mode interference

    NASA Astrophysics Data System (ADS)

    Shahabuddin, N. S.; Ismail, M. A.; Paul, M. C.; Damanhuri, S. S. A.; Harun, S. W.; Ahmad, H.; Pal, M.; Bhadra, S. K.

    2011-11-01

    Multi-wavelength Ytterbium-doped fiber laser (YDFL) is demonstrated using a longitudinal mode interference assisted by a four-wave mixing (FWM) effect in a ring laser cavity. The gain medium is a 16 m long of the fabricated (Ytterbium-doped fiber) YDF, which has a core composition of 0.8 wt % of Yb2O3, 1.8 wt % of Al2O3 and 23 wt % of GeO2, Ytterbium ion fluorescence lifetime of 1.1 ms and absorption of 9.0 dB/m at the pump wavelength of 976 nm. 20 m long photonic crystal fiber (PCF) is used to provide FWM effect so that the energy of different oscillating lines can be redistributed to improve multi-wavelength operation. The proposed laser generates 12 lines of optical comb with a line spacing of approximately 0.59 nm at 1035 nm region.

  9. Mechanism of formation of ytterbium disilicide nanofilms on the Si(111) surface

    NASA Astrophysics Data System (ADS)

    Kuz'min, M. V.; Mittsev, M. A.; Mukhuchev, A. M.

    2015-10-01

    Thin-film Yb-Si(111) structures have been studied experimentally for different film thicknesses and at substrate temperatures of 300-1500 K. The temperatures at which the formation of ytterbium disilicide begins and ends, the thermal stability, and the work function have been determined. It has been shown that yttrium disilicide is formed at relatively low temperatures. The mechanism explaining this fact has been proposed. This mechanism also explains why and in which manner ytterbium transforms silicon into silicide despite the fact that the bond between atoms in the silicon crystal is stronger than that in silicide.

  10. 25 CFR 175.60 - Appeals to the area director.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Appeals to the area director. 175.60 Section 175.60... UTILITIES Appeals § 175.60 Appeals to the area director. (a) Any person adversely affected by a decision made under this part by a person under the authority of an Area Director may file a notice of...

  11. 19 CFR 10.175 - Imported directly defined.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Imported directly defined. 10.175 Section 10.175... of Preferences § 10.175 Imported directly defined. Eligible articles shall be imported directly from... Preferences. For purposes of §§ 10.171 through 10.178 the words “imported directly” mean: (a) Direct...

  12. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  13. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 10 Energy 2 2012-01-01 2012-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  14. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 10 Energy 2 2011-01-01 2011-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  15. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 10 Energy 2 2013-01-01 2013-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  16. 10 CFR 52.175 - Transfer of manufacturing license.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 10 Energy 2 2014-01-01 2014-01-01 false Transfer of manufacturing license. 52.175 Section 52.175 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Manufacturing Licenses § 52.175 Transfer of manufacturing license. A manufacturing...

  17. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 11 2010-01-01 2010-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... equipment. (a) Contract forms. The borrower may, in its discretion, use RUS Form 198, Equipment Contract,...

  18. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 11 2013-01-01 2013-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material...

  19. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 11 2012-01-01 2012-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material...

  20. 7 CFR 1726.175 - General plant materials.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 11 2011-01-01 2011-01-01 false General plant materials. 1726.175 Section 1726.175... AGRICULTURE ELECTRIC SYSTEM CONSTRUCTION POLICIES AND PROCEDURES General Plant § 1726.175 General plant... determine the procurement method that best meets its needs for purchase of general plant material...

  1. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 2 2010-04-01 2010-04-01 false Pasteurized cheese spread. 133.175 Section 133.175 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175...

  2. 40 CFR 17.5 - Eligibility of applicants.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL ACCESS TO JUSTICE ACT IN EPA ADMINISTRATIVE PROCEEDINGS General Provisions § 17.5 Eligibility...

  3. 14 CFR 91.175 - Takeoff and landing under IFR.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 2 2012-01-01 2012-01-01 false Takeoff and landing under IFR. 91.175 Section 91.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES GENERAL OPERATING AND FLIGHT RULES Flight Rules Instrument Flight Rules § 91.175 Takeoff and...

  4. 14 CFR 91.175 - Takeoff and landing under IFR.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 2 2013-01-01 2013-01-01 false Takeoff and landing under IFR. 91.175 Section 91.175 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIR TRAFFIC AND GENERAL OPERATING RULES GENERAL OPERATING AND FLIGHT RULES Flight Rules Instrument Flight Rules § 91.175 Takeoff and...

  5. 49 CFR 175.31 - Reports of discrepancies.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 2 2014-10-01 2014-10-01 false Reports of discrepancies. 175.31 Section 175.31 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations § 175.31...

  6. 25 CFR 175.31 - Methods and terms of payment.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Methods and terms of payment. 175.31 Section 175.31 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Billing, Payments, and Collections § 175.31 Methods and terms of payment. Payments shall be...

  7. 25 CFR 175.40 - Financing of extensions and upgrades.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Financing of extensions and upgrades. 175.40 Section 175.40 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES System Extensions and Upgrades § 175.40 Financing of extensions and upgrades. (a) The utility...

  8. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 16 2014-07-01 2014-07-01 false Prevention program/Program 3. 68.175 Section 68.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention...

  9. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 16 2012-07-01 2012-07-01 false Prevention program/Program 3. 68.175 Section 68.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention...

  10. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 16 2013-07-01 2013-07-01 false Prevention program/Program 3. 68.175 Section 68.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention...

  11. 33 CFR 175.15 - Personal flotation devices required.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 2 2011-07-01 2011-07-01 false Personal flotation devices required. 175.15 Section 175.15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Personal Flotation Devices § 175.15...

  12. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 2 2012-04-01 2012-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the...

  13. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 2 2013-04-01 2013-04-01 false Pasteurized cheese spread. 133.175 Section 133.175... FOR HUMAN CONSUMPTION CHEESES AND RELATED CHEESE PRODUCTS Requirements for Specific Standardized Cheese and Related Products § 133.175 Pasteurized cheese spread. Pasteurized cheese spread is the...

  14. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

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  15. 21 CFR 133.175 - Pasteurized cheese spread.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

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  16. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 7 2014-10-01 2014-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  17. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 7 2013-10-01 2013-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  18. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 7 2012-10-01 2012-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  19. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  20. 46 CFR 175.800 - Approved equipment and material.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Approved equipment and material. 175.800 Section 175.800 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.800 Approved equipment and material. (a) Equipment and material that...

  1. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Pressure-sensitive adhesives. 175.125 Section 175...) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives. Pressure-sensitive adhesives may be safely used as...

  2. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Pressure-sensitive adhesives. 175.125 Section 175...) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives....

  3. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Pressure-sensitive adhesives. 175.125 Section 175...) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives....

  4. 46 CFR 175.115 - Applicability to offshore supply vessels.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 7 2010-10-01 2010-10-01 false Applicability to offshore supply vessels. 175.115 Section 175.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.115 Applicability to offshore supply vessels....

  5. 19 CFR 122.175 - Exemption from penalties.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 1 2014-04-01 2014-04-01 false Exemption from penalties. 122.175 Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Air Carrier Smuggling Prevention Program § 122.175 Exemption...

  6. 19 CFR 122.175 - Exemption from penalties.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 1 2013-04-01 2013-04-01 false Exemption from penalties. 122.175 Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Air Carrier Smuggling Prevention Program § 122.175 Exemption...

  7. 19 CFR 122.175 - Exemption from penalties.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 1 2012-04-01 2012-04-01 false Exemption from penalties. 122.175 Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Air Carrier Smuggling Prevention Program § 122.175 Exemption...

  8. 19 CFR 122.175 - Exemption from penalties.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 1 2011-04-01 2011-04-01 false Exemption from penalties. 122.175 Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Air Carrier Smuggling Prevention Program § 122.175 Exemption...

  9. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  10. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  11. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  12. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Obtaining rights-of-way. 175.50 Section 175.50 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for...

  13. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 29 Labor 9 2014-07-01 2014-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  14. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  15. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 29 Labor 9 2013-07-01 2013-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  16. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 29 Labor 9 2012-07-01 2012-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  17. 29 CFR 1952.175 - Changes to approved plans.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 9 2011-07-01 2011-07-01 false Changes to approved plans. 1952.175 Section 1952.175 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED) APPROVED STATE PLANS FOR ENFORCEMENT OF STATE STANDARDS California § 1952.175 Changes to...

  18. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  19. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  20. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  1. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  2. 25 CFR 175.10 - Revenues collected from power operations.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Revenues collected from power operations. 175.10 Section 175.10 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Service Fees, Electric Power Rates and Revenues § 175.10 Revenues collected from...

  3. 40 CFR 35.175 - Maximum federal share.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 1 2012-07-01 2012-07-01 false Maximum federal share. 35.175 Section 35.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE...)) § 35.175 Maximum federal share. The Regional Administrator may provide a maximum of 75 percent of...

  4. 40 CFR 35.175 - Maximum federal share.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 1 2010-07-01 2010-07-01 false Maximum federal share. 35.175 Section 35.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE...)) § 35.175 Maximum federal share. The Regional Administrator may provide a maximum of 75 percent of...

  5. 40 CFR 35.175 - Maximum federal share.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 1 2011-07-01 2011-07-01 false Maximum federal share. 35.175 Section 35.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE...)) § 35.175 Maximum federal share. The Regional Administrator may provide a maximum of 75 percent of...

  6. 40 CFR 35.175 - Maximum federal share.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 1 2013-07-01 2013-07-01 false Maximum federal share. 35.175 Section 35.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE...)) § 35.175 Maximum federal share. The Regional Administrator may provide a maximum of 75 percent of...

  7. 40 CFR 35.175 - Maximum federal share.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 1 2014-07-01 2014-07-01 false Maximum federal share. 35.175 Section 35.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GRANTS AND OTHER FEDERAL ASSISTANCE...)) § 35.175 Maximum federal share. The Regional Administrator may provide a maximum of 75 percent of...

  8. 46 CFR 175.115 - Applicability to offshore supply vessels.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 7 2011-10-01 2011-10-01 false Applicability to offshore supply vessels. 175.115 Section 175.115 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS (UNDER 100 GROSS TONS) GENERAL PROVISIONS § 175.115 Applicability to offshore supply vessels....

  9. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 1 2013-10-01 2013-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  10. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 1 2014-10-01 2014-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare Department of Health and Human Services GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information shall be made clear, where appropriate,...

  11. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  12. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 1 2011-10-01 2011-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  13. 45 CFR 17.5 - Context to be reflected.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 1 2012-10-01 2012-10-01 false Context to be reflected. 17.5 Section 17.5 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION RELEASE OF ADVERSE INFORMATION TO NEWS MEDIA § 17.5 Context to be reflected. The authority for and the character of the information...

  14. 21 CFR 175.300 - Resinous and polymeric coatings.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Resinous and polymeric coatings. 175.300 Section 175.300 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of Coatings § 175.300 Resinous and...

  15. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 13 Business Credit and Assistance 1 2012-01-01 2012-01-01 false Coastal barrier islands. 120.175 Section 120.175 Business Credit and Assistance SMALL BUSINESS ADMINISTRATION BUSINESS LOANS Policies Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not...

  16. 33 CFR 175.15 - Personal flotation devices required.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 2 2012-07-01 2012-07-01 false Personal flotation devices required. 175.15 Section 175.15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Personal Flotation Devices § 175.15 Personal flotation devices required. Except as provided in...

  17. 33 CFR 175.15 - Personal flotation devices required.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 2 2010-07-01 2010-07-01 false Personal flotation devices required. 175.15 Section 175.15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Personal Flotation Devices § 175.15...

  18. 33 CFR 175.15 - Personal flotation devices required.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 2 2013-07-01 2013-07-01 false Personal flotation devices required. 175.15 Section 175.15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Personal Flotation Devices § 175.15...

  19. 33 CFR 175.15 - Personal flotation devices required.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Personal flotation devices required. 175.15 Section 175.15 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) BOATING SAFETY EQUIPMENT REQUIREMENTS Personal Flotation Devices § 175.15...

  20. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Pressure-sensitive adhesives. 175.125 Section 175...) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives....

  1. 21 CFR 175.125 - Pressure-sensitive adhesives.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Pressure-sensitive adhesives. 175.125 Section 175...) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use Only as Components of Adhesives § 175.125 Pressure-sensitive adhesives....

  2. 25 CFR 175.4 - Authority of area director.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Authority of area director. 175.4 Section 175.4 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES General Provisions § 175.4 Authority of area director. The Area Director may delegate authority under...

  3. 19 CFR 122.175 - Exemption from penalties.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 1 2010-04-01 2010-04-01 false Exemption from penalties. 122.175 Section 122.175 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY AIR COMMERCE REGULATIONS Air Carrier Smuggling Prevention Program § 122.175 Exemption...

  4. 7 CFR 1260.175 - Late-payment charge.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 10 2014-01-01 2014-01-01 false Late-payment charge. 1260.175 Section 1260.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING... Promotion and Research Order Assessments § 1260.175 Late-payment charge. Any unpaid assessments due to...

  5. 7 CFR 1260.175 - Late-payment charge.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 10 2013-01-01 2013-01-01 false Late-payment charge. 1260.175 Section 1260.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING... Promotion and Research Order Assessments § 1260.175 Late-payment charge. Any unpaid assessments due to...

  6. 7 CFR 1260.175 - Late-payment charge.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 10 2011-01-01 2011-01-01 false Late-payment charge. 1260.175 Section 1260.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING... Promotion and Research Order Assessments § 1260.175 Late-payment charge. Any unpaid assessments due to...

  7. 7 CFR 1260.175 - Late-payment charge.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 10 2012-01-01 2012-01-01 false Late-payment charge. 1260.175 Section 1260.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING... Promotion and Research Order Assessments § 1260.175 Late-payment charge. Any unpaid assessments due to...

  8. 7 CFR 1260.175 - Late-payment charge.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 10 2010-01-01 2010-01-01 false Late-payment charge. 1260.175 Section 1260.175 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING... Promotion and Research Order Assessments § 1260.175 Late-payment charge. Any unpaid assessments due to...

  9. 12 CFR 308.175 - Measure of awards.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 12 Banks and Banking 4 2011-01-01 2011-01-01 false Measure of awards. 308.175 Section 308.175 Banks and Banking FEDERAL DEPOSIT INSURANCE CORPORATION PROCEDURE AND RULES OF PRACTICE RULES OF... § 308.175 Measure of awards. (a) General rule. Awards will be based on rates customarily charged...

  10. 25 CFR 175.40 - Financing of extensions and upgrades.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 1 2011-04-01 2011-04-01 false Financing of extensions and upgrades. 175.40 Section 175.40 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES System Extensions and Upgrades § 175.40 Financing of extensions and upgrades. (a) The utility...

  11. 25 CFR 175.40 - Financing of extensions and upgrades.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 1 2013-04-01 2013-04-01 false Financing of extensions and upgrades. 175.40 Section 175.40 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES System Extensions and Upgrades § 175.40 Financing of extensions and upgrades. (a) The utility...

  12. 25 CFR 175.40 - Financing of extensions and upgrades.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 1 2014-04-01 2014-04-01 false Financing of extensions and upgrades. 175.40 Section 175.40 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES System Extensions and Upgrades § 175.40 Financing of extensions and upgrades. (a) The utility...

  13. 25 CFR 175.40 - Financing of extensions and upgrades.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 1 2012-04-01 2011-04-01 true Financing of extensions and upgrades. 175.40 Section 175.40 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES System Extensions and Upgrades § 175.40 Financing of extensions and upgrades. (a) The utility...

  14. 2 CFR 175.5 - Purpose of this part.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 2 Grants and Agreements 1 2010-01-01 2010-01-01 false Purpose of this part. 175.5 Section 175.5 Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS Reserved AWARD TERM FOR TRAFFICKING IN PERSONS § 175.5 Purpose of this part. This part establishes...

  15. Solid state reactions of nanocrystalline Ce0.5Yb0.5O1.75 mixed oxide with high surface area silica in oxidizing and reducing atmosphere

    NASA Astrophysics Data System (ADS)

    Małecka, Małgorzata A.; Kępiński, Leszek

    2012-08-01

    The interaction of nanocrystalline Ce0.5Yb0.5O1.75 mixed oxide with a high surface amorphous silica support in an oxidizing and reducing atmosphere was studied by XRD, HRTEM, SAED, SEM and BET techniques. The Ce0.5Yb0.5O1.75-SiO2 system shows very high structural and size stability in the oxidizing atmosphere up to 1000 °C, but in hydrogen spreading of the oxide onto silica occurs at temperatures above 800 °C. In the oxidizing atmosphere stability of the mixed oxide is limited by extraction of ytterbium from the oxide driven by a tendency to form ytterbium silicates. A new polymorph of Yb silicate, isomorphic with y-Y2Si2O7 (yttrialite), has been identified in the samples containing the mixed Ce-Yb oxide. The absence of y-Yb2Si2O7 silicate in the Yb2O3-SiO2 samples treated in similar conditions indicates that Ce4+ ions are needed to stabilize the structure.

  16. SOLITONS AND OPTICAL FIBERS: Self-Q-switched ytterbium-doped cladding-pumped fibre laser

    NASA Astrophysics Data System (ADS)

    Grukh, Dmitrii A.; Kurkov, Andrei S.; Razdobreev, I. M.; Fotiadi, A. A.

    2002-11-01

    A self-Q-switched ytterbium-doped double-clad fibre laser is described. A samarium-doped fibre is used as a filter for protecting a pump source. A fibre coupler is employed to obtain a nonlinear feedback. The mechanism of pulse formation in the laser is considered, and the dependence of its output pulse on the coupler parameters is studied.

  17. Novel highly emissive tetracyanotetraphenylporphyrazine ytterbium complex for optoelectronic and biophotonic applications

    NASA Astrophysics Data System (ADS)

    Klapshina, Larisa G.; Douglas, William E.; Grigoryev, Ilya S.; Shirmanova, Marina V.; Gerbier, Philippe; Bushuk, Boris A.

    2010-02-01

    The preparation is described of a novel highly emissive ytterbium complex with a proposed unusual structure obtained by reaction of tricyanovinylbenzene (TCNVB) with bis(indenyl)ytterbium(II) in THF. The reaction occurs under extremely mild conditions, the tetraphenyltetracyanoporphyrazine macrocycle being assembled in high yield from TCNVB building-blocks by Yb3+-template synthesis. The analytical, spectral and electrochemical investigations of the obtained ytterbium complex indicate its existence in the form of a binuclear adduct with Yb(TCNVB)3 species in which a one doubly reduced TCNVB molecule bridges two Yb3+ cations. The formation of a disordered polynuclear coordination polymer network including a macrocyclic structure and metal cations bridged through the nitrile nitrogen atoms is proposed. The complex is readily soluble and is compatible with a variety of polymeric matrices giving doped polymeric glasses and films which are highly luminescent in the biologically relevant optical window covering the visible and near infrared range (640-1000 nm). In addition, doped polymeric glasses and films highly emissive at the telecommunication wavelength (1540 nm) including the novel ytterbium complex and originally not luminescent erbium chelate in an equimolar ratio have been obtained. The compound is found to be an extraordinarily strong sensitizer of near-IR Er3+ emission. Use of the Yb complex as a fluorescent marker for biomedical in vitro investigations has been demonstrated.

  18. Residual stresses and phase transformations in Ytterbium silicate environmental barrier coatings

    NASA Astrophysics Data System (ADS)

    Stolzenburg, Fabian

    Due to their high melting temperature, low density, and good thermomechanical stability, silicon-based ceramics (SiC, Si3N4) are some of the most promising materials systems for high temperature structural applications in gas turbine engines. However, their silica surface layer reacts with water vapor contained in combustion environments. The resulting hydroxide layer volatilizes, leading to component recession. Environmental barrier coatings (EBCs) have been developed to shield the substrate from degradation. Next generation coatings for silicon-based ceramics based on ytterbium silicates have shown a promising combination of very low and good thermomechanical properties. The focus of this thesis is threefold: In the first part, phase transformations in plasma sprayed ytterbium silicates were investigated. Plasma sprayed materials are known to contain large amounts of amorphous material. Phase changes during the conversion from amorphous to crystalline materials were investigated as they have been known to lead to failure in many coatings. The second part of this work focused on measuring residual stresses in multilayer EBCs using synchrotron X-ray diffraction (XRD). Strains were resolved spatially, with probe sizes as small as 20 um. Stresses were calculated using mechanical properties of ytterbium silicates, determined with in-situ loading and heating experiments. In-situ and ex-situ heating experiments allowed for the study of changes in stress states that occur in these EBC materials during heating and cooling cycles. Lastly, the interaction of ytterbium silicates with low-melting environmental calcium-magnesium-aluminosilicate (CMAS) glasses was studied. Synchrotron XRD was used to study the influence of CMAS on the stress state in the coating, X-ray computed tomography was used to provide 3D images of coatings, and EDS and TEM analysis were used to study the interactions at the CMAS/ytterbium silicate interface in detail.

  19. Preparation of a Ytterbium-tagged Gunshot Residue Standard for Quality Control in the Forensic Analysis of GSR.

    PubMed

    Hearns, Nigel G R; Laflèche, Denis N; Sandercock, Mark L

    2015-05-01

    Preparation of a ytterbium-tagged gunshot residue (GSR) reference standard for scanning electron microscopy and energy dispersive X-ray spectroscopic (SEM-EDS) microanalysis is reported. Two different chemical markers, ytterbium and neodymium, were evaluated by spiking the primers of 38 Special ammunition cartridges (no propellant, no projectile) and discharging them onto 12.7 mm diameter aluminum SEM pin stubs. Following SEM-EDS microanalysis, the majority of tri-component particles containing lead, barium, and antimony (PbBaSb) were successfully tagged with the chemical marker. Results demonstrate a primer spiked with 0.75% weight percent of ytterbium nitrate affords PbBaSb particles characteristic of GSR with a ytterbium inclusion efficiency of between 77% and 100%. Reproducibility of the method was verified, and durability of the ytterbium-tagged tri-component particles under repeated SEM-EDS analysis was also tested. The ytterbium-tagged PbBaSb particles impart synthetic traceability to a GSR reference standard and are suitable for analysis alongside case work samples, as a positive control for quality assurance purposes. PMID:25678346

  20. Solid state reactions of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with high surface area silica in oxidizing and reducing atmosphere

    SciTech Connect

    Malecka, Malgorzata A.; Kepinski, Leszek

    2012-08-15

    The interaction of nanocrystalline Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75} mixed oxide with a high surface amorphous silica support in an oxidizing and reducing atmosphere was studied by XRD, HRTEM, SAED, SEM and BET techniques. The Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} system shows very high structural and size stability in the oxidizing atmosphere up to 1000 Degree-Sign C, but in hydrogen spreading of the oxide onto silica occurs at temperatures above 800 Degree-Sign C. In the oxidizing atmosphere stability of the mixed oxide is limited by extraction of ytterbium from the oxide driven by a tendency to form ytterbium silicates. A new polymorph of Yb silicate, isomorphic with y-Y{sub 2}Si{sub 2}O{sub 7} (yttrialite), has been identified in the samples containing the mixed Ce-Yb oxide. The absence of y-Yb{sub 2}Si{sub 2}O{sub 7} silicate in the Yb{sub 2}O{sub 3}-SiO{sub 2} samples treated in similar conditions indicates that Ce{sup 4+} ions are needed to stabilize the structure. - Graphical abstract: Structure evolution of nano-Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in air and in H{sub 2}. Highlights: Black-Right-Pointing-Pointer Nano-Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} on SiO{sub 2} is stable in air up to 1000 Degree-Sign C but spreads in hydrogen at 800 Degree-Sign C. Black-Right-Pointing-Pointer Formation of Yb silicates determines the stability of Ce{sub 0.50}Yb{sub 0.50}O{sub 1.75} at high temperatures. Black-Right-Pointing-Pointer New, y-Yb{sub 2}Si{sub 2}O{sub 7} silicate (yttrialite type) forms in Ce{sub 0.5}Yb{sub 0.5}O{sub 1.75}-SiO{sub 2} in H{sub 2} at 1100 Degree-Sign C.

  1. Role of oxygen hole centres in the photodarkening of ytterbium-doped phosphosilicate fibre

    SciTech Connect

    Rybaltovsky, A A; Bobkov, K K; Likhachev, M E; Bubnov, M M; Dianov, E M; Umnikov, A A; Lipatov, D S; Gur'yanov, A N; Romanov, A N; Sulimov, V B

    2013-11-30

    We have studied the photodarkening in active fibres with an ytterbium-doped phosphosilicate glass core under IR irradiation with a pump source (920 nm) and UV irradiation (193 nm). Analysis of absorption and luminescence spectra suggests that such irradiations produce phosphorus – oxygen – hole centres (P-OHCs) in the core glass network and lead to the reduction of the ytterbium ions to a divalent state (Yb{sup 2+}). The photoinduced optical loss in the fibres in the visible range (400 – 700 nm) is mainly due to absorption by the P-OHCs. A quantum-mechanical model is proposed for P-OHC and Yb{sup 2+} formation. (nonlinear optical phenomena)

  2. Hybrid Ytterbium-doped large-mode-area photonic crystal fiber amplifier for long wavelengths.

    PubMed

    Petersen, Sidsel R; Alkeskjold, Thomas T; Poli, Federica; Coscelli, Enrico; Jørgensen, Mette M; Laurila, Marko; Lægsgaard, Jesper; Broeng, Jes

    2012-03-12

    A large-mode-area Ytterbium-doped photonic crystal fiber amplifier with build-in gain shaping is presented. The fiber cladding consists of a hexagonal lattice of air holes, where three rows are replaced with circular high-index inclusions. Seven missing air holes define the large-mode-area core. Light confinement is achieved by combined index and bandgap guiding, which allows for single-mode operation and gain shaping through distributed spectral filtering of amplified spontaneous emission. The fiber properties are ideal for amplification in the long wavelength regime of the Ytterbium gain spectrum above 1100 nm, and red shifting of the maximum gain to 1130 nm is demonstrated. PMID:22418478

  3. A pure silica ytterbium-doped sol-gel-based fiber laser

    NASA Astrophysics Data System (ADS)

    Baz, Assaad; El Hamzaoui, Hicham; Fsaifes, Ihsan; Bouwmans, Géraud; Bouazaoui, Mohamed; Bigot, Laurent

    2013-05-01

    In this letter it is demonstrated that the sol-gel route combined with fiber fabrication by the stack and draw method can be used to realize efficient fiber lasers. More precisely, a pure silica ytterbium-doped photonic crystal fiber with a core obtained by the sol-gel polymeric technique is studied, and a laser efficiency of more than 73% is achieved for a laser emission around 1034 nm. The optical and spectroscopic properties of the monolith and fiber are investigated, together with the sensitivity of the fiber to photodarkening. The dimensions of the ytterbium-doped monolith combined with the uniform doping and refractive index that are reported make this technique particularly interesting for the realization of large-mode area fibers.

  4. Luminescence and absorption of divalent ytterbium ion in yttrium-aluminum garnet ceramics

    NASA Astrophysics Data System (ADS)

    Solomonov, V. I.; Osipov, V. V.; Spirina, A. V.

    2014-09-01

    Strong absorption bands at 280, 385, and 640 nm; a pulsed cathodoluminescence band with peaks at 325 and 520 nm and a dip at 385 nm; and a structured luminescence band in the range of 591-711 nm composed of four pair lines and having a dip near 640 nm have been observed in the spectra of yttrium-aluminum garnet ceramics activated with ytterbium (10 mol %) and subjected to vacuum sintering at a temperature of 1800°C. It is shown that these spectral features are absorption and luminescence bands of divalent ytterbium ions with the 4 f 136 s electron configuration of the ground state. These ions occupy the cubic site that is formed under conditions of oxygen deficit and disappears when the latter is removed during annealing ceramics in air.

  5. Experimental Performance of a Single-Mode Ytterbium-doped Fiber Ring Laser with Intracavity Modulator

    NASA Technical Reports Server (NTRS)

    Numata, Kenji; Camp, Jordan

    2012-01-01

    We have developed a linearly polarized Ytterbium-doped fiber ring laser with a single longitudinal mode output at 1064 run. A fiber-coupled intracavity phase modulator ensured mode-hop free operation and allowed fast frequency tuning. The fiber laser was locked with high stability to an iodine-stabilized laser, showing a frequency noise suppression of a factor approx 10 (exp 5) at 1 mHz

  6. Soliton transmission and supercontinuum generation in holey fiber, using a diode pumped Ytterbium fiber source.

    PubMed

    Price, Jonathan; Belardi, W; Monro, T; Malinowski, A; Piper, A; Richardson, D

    2002-04-22

    We report linear dispersion compensation, soliton pulse formation, soliton compression, and ultra-broad supercontinuum generation in a holey fiber with anomalous dispersion at wavelengths above 800nm. The holey fiber was seeded with ultrashort pulses from a diode pumped, Ytterbium (Yb)-doped fiber source operating at 1.06 microm. The results highlight the compatibility of the rapidly developing holey fiber technology with short pulse Yb-doped fiber lasers for wide application. PMID:19436371

  7. High-power, efficient and azimuthally polarized ytterbium-doped fiber laser.

    PubMed

    Zou, Lin; Yao, Yao; Li, Jianlang

    2015-01-15

    An ytterbium-doped fiber laser was demonstrated to emit azimuthally polarized light with high laser power and efficiency, in which a birefringent yttrium vanadate (YVO(4)) crystal was used as the intracavity polarization discriminator. The laser power reached 3.94 W with a slope efficiency of ∼71%. Our study proved that an efficient, high-power vector fiber laser would be realistic under the utilization of a simple and low-cost birefringent crystal as polarization discriminator. PMID:25679851

  8. 20 CFR 401.175 - Government Accountability Office.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 2 2010-04-01 2010-04-01 false Government Accountability Office. 401.175... RECORDS AND INFORMATION Disclosure of Official Records and Information § 401.175 Government Accountability Office. We disclose information to the Government Accountability Office when that agency needs...

  9. 40 CFR 60.175 - Monitoring of operations.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 7 2013-07-01 2013-07-01 false Monitoring of operations. 60.175... Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter subject to the provisions of this subpart shall install and operate: (1) A continuous monitoring system...

  10. 40 CFR 60.175 - Monitoring of operations.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 7 2014-07-01 2014-07-01 false Monitoring of operations. 60.175... Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter subject to the provisions of this subpart shall install and operate: (1) A continuous monitoring system...

  11. 40 CFR 60.175 - Monitoring of operations.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 7 2012-07-01 2012-07-01 false Monitoring of operations. 60.175... Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter subject to the provisions of this subpart shall install and operate: (1) A continuous monitoring system...

  12. 40 CFR 60.175 - Monitoring of operations.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 6 2011-07-01 2011-07-01 false Monitoring of operations. 60.175... Smelters § 60.175 Monitoring of operations. (a) The owner or operator of any primary zinc smelter subject to the provisions of this subpart shall install and operate: (1) A continuous monitoring system...

  13. 19 CFR 175.3 - Domestic interested party.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 19 Customs Duties 2 2011-04-01 2011-04-01 false Domestic interested party. 175.3 Section 175.3 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) PETITIONS BY DOMESTIC INTERESTED PARTIES Request for Classification, Appraised...

  14. 19 CFR 175.3 - Domestic interested party.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 19 Customs Duties 2 2014-04-01 2014-04-01 false Domestic interested party. 175.3 Section 175.3 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) PETITIONS BY DOMESTIC INTERESTED PARTIES Request for Classification, Appraised...

  15. 19 CFR 175.3 - Domestic interested party.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 19 Customs Duties 2 2012-04-01 2012-04-01 false Domestic interested party. 175.3 Section 175.3 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) PETITIONS BY DOMESTIC INTERESTED PARTIES Request for Classification, Appraised...

  16. 19 CFR 175.3 - Domestic interested party.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 19 Customs Duties 2 2013-04-01 2013-04-01 false Domestic interested party. 175.3 Section 175.3 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) PETITIONS BY DOMESTIC INTERESTED PARTIES Request for Classification, Appraised...

  17. 19 CFR 175.3 - Domestic interested party.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 19 Customs Duties 2 2010-04-01 2010-04-01 false Domestic interested party. 175.3 Section 175.3 Customs Duties U.S. CUSTOMS AND BORDER PROTECTION, DEPARTMENT OF HOMELAND SECURITY; DEPARTMENT OF THE TREASURY (CONTINUED) PETITIONS BY DOMESTIC INTERESTED PARTIES Request for Classification, Appraised...

  18. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 42 Public Health 2 2011-10-01 2011-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  19. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 42 Public Health 2 2013-10-01 2013-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  20. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 42 Public Health 2 2012-10-01 2012-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  1. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 42 Public Health 2 2014-10-01 2014-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  2. 42 CFR 411.175 - Basis for Medicare primary payments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 2 2010-10-01 2010-10-01 false Basis for Medicare primary payments. 411.175 Section 411.175 Public Health CENTERS FOR MEDICARE & MEDICAID SERVICES, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICARE PROGRAM EXCLUSIONS FROM MEDICARE AND LIMITATIONS ON MEDICARE PAYMENT Special Rules:...

  3. 50 CFR 217.175 - Requirements for monitoring and reporting.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 50 Wildlife and Fisheries 9 2011-10-01 2011-10-01 false Requirements for monitoring and reporting. 217.175 Section 217.175 Wildlife and Fisheries NATIONAL MARINE FISHERIES SERVICE, NATIONAL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DEPARTMENT OF COMMERCE MARINE MAMMALS REGULATIONS GOVERNING THE TAKE OF MARINE MAMMALS INCIDENTAL TO...

  4. 18 CFR 367.1750 - Account 175, Derivative instrument assets.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 18 Conservation of Power and Water Resources 1 2010-04-01 2010-04-01 false Account 175, Derivative instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY... GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175,...

  5. 25 CFR 175.11 - Procedures for setting service fees.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... UTILITIES Service Fees, Electric Power Rates and Revenues § 175.11 Procedures for setting service fees. The Area Director shall establish, and amend as needed, service fees to cover the expense of customer... 25 Indians 1 2010-04-01 2010-04-01 false Procedures for setting service fees. 175.11 Section...

  6. 21 CFR 175.270 - Poly(vinyl fluoride) resins.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

  7. 21 CFR 175.270 - Poly(vinyl fluoride) resins.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

  8. 21 CFR 175.270 - Poly(vinyl fluoride) resins.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 3 2014-04-01 2014-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of...

  9. 46 CFR 117.175 - Survival craft equipment.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Survival craft equipment. 117.175 Section 117.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS CARRYING MORE THAN 150 PASSENGERS OR WITH OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Survival Craft Arrangements...

  10. 40 CFR 17.5 - Eligibility of applicants.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 1 2013-07-01 2013-07-01 false Eligibility of applicants. 17.5 Section 17.5 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY GENERAL IMPLEMENTATION OF THE EQUAL... other tax-exempt organization described in section 501(c)(3) of the Internal Revenue Code (26 U.S.C....

  11. 49 CFR 175.3 - Unacceptable hazardous materials shipments.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Unacceptable hazardous materials shipments. 175.3 Section 175.3 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE BY AIRCRAFT General Information and Regulations...

  12. 46 CFR 117.175 - Survival craft equipment.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft equipment. 117.175 Section 117.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) SMALL PASSENGER VESSELS CARRYING MORE THAN 150 PASSENGERS OR WITH OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS LIFESAVING EQUIPMENT AND ARRANGEMENTS Survival Craft Arrangements...

  13. 47 CFR 80.175 - Availability of operator licenses.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Availability of operator licenses. 80.175... SERVICES STATIONS IN THE MARITIME SERVICES Operator Requirements General Operator Requirements § 80.175 Availability of operator licenses. All operator licenses required by this subpart must be readily available...

  14. 2 CFR 175.5 - Purpose of this part.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 2 Grants and Agreements 1 2011-01-01 2011-01-01 false Purpose of this part. 175.5 Section 175.5 Grants and Agreements Office of Management and Budget Guidance for Grants and Agreements OFFICE OF MANAGEMENT AND BUDGET GOVERNMENTWIDE GUIDANCE FOR GRANTS AND AGREEMENTS AWARD TERM FOR TRAFFICKING IN...

  15. 40 CFR 141.175 - Reporting and recordkeeping requirements.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 23 2011-07-01 2011-07-01 false Reporting and recordkeeping requirements. 141.175 Section 141.175 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Enhanced Filtration and Disinfection-Systems Serving 10,000 or More People...

  16. 21 CFR 175.300 - Resinous and polymeric coatings.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Resinous and polymeric coatings. 175.300 Section 175.300 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF COATINGS Substances for Use as Components of...

  17. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 13 Business Credit and Assistance 1 2010-01-01 2010-01-01 false Coastal barrier islands. 120.175... Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not make or guarantee any loan within the Coastal Barrier...

  18. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 13 Business Credit and Assistance 1 2011-01-01 2011-01-01 false Coastal barrier islands. 120.175... Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not make or guarantee any loan within the Coastal Barrier...

  19. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 13 Business Credit and Assistance 1 2013-01-01 2013-01-01 false Coastal barrier islands. 120.175... Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not make or guarantee any loan within the Coastal Barrier...

  20. 13 CFR 120.175 - Coastal barrier islands.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 13 Business Credit and Assistance 1 2014-01-01 2014-01-01 false Coastal barrier islands. 120.175... Applying to All Business Loans Requirements Imposed Under Other Laws and Orders § 120.175 Coastal barrier islands. SBA and Intermediaries may not make or guarantee any loan within the Coastal Barrier...

  1. 14 CFR 406.175 - Appeal from initial decision.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 4 2010-01-01 2010-01-01 false Appeal from initial decision. 406.175... Practice in FAA Space Transportation Adjudications § 406.175 Appeal from initial decision. (a) Notice of appeal. A party may appeal the initial decision, and any decision not previously appealed pursuant to...

  2. 21 CFR 175.210 - Acrylate ester copolymer coating.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Acrylate ester copolymer coating. 175.210 Section 175.210 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS...

  3. 21 CFR 175.210 - Acrylate ester copolymer coating.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Acrylate ester copolymer coating. 175.210 Section 175.210 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS...

  4. 21 CFR 175.270 - Poly(vinyl fluoride) resins.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 3 2011-04-01 2011-04-01 false Poly(vinyl fluoride) resins. 175.270 Section 175.270 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

  5. 21 CFR 175.270 - Poly(vinyl fluoride) resins.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 3 2010-04-01 2009-04-01 true Poly(vinyl fluoride) resins. 175.270 Section 175.270 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS OF...

  6. 18 CFR 367.1750 - Account 175, Derivative instrument assets.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 18 Conservation of Power and Water Resources 1 2011-04-01 2011-04-01 false Account 175, Derivative instrument assets. 367.1750 Section 367.1750 Conservation of Power and Water Resources FEDERAL ENERGY... GAS ACT Balance Sheet Chart of Accounts Current and Accrued Assets § 367.1750 Account 175,...

  7. 27 CFR 53.175 - Readjustment for local advertising charges.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 27 Alcohol, Tobacco Products and Firearms 2 2010-04-01 2010-04-01 false Readjustment for local advertising charges. 53.175 Section 53.175 Alcohol, Tobacco Products and Firearms ALCOHOL AND TOBACCO TAX AND TRADE BUREAU, DEPARTMENT OF THE TREASURY (CONTINUED) FIREARMS MANUFACTURERS EXCISE TAXES-FIREARMS...

  8. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  9. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  10. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  11. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  12. 25 CFR 175.22 - Requirements for receiving electrical service.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... service, shall enter into a written service agreement or special contract for electrical power services. ... Section 175.22 Indians BUREAU OF INDIAN AFFAIRS, DEPARTMENT OF THE INTERIOR LAND AND WATER INDIAN ELECTRIC POWER UTILITIES Utility Service Administration § 175.22 Requirements for receiving electrical...

  13. Studies on output characteristics of stable dual-wavelength ytterbium-doped photonic crystal fiber laser

    NASA Astrophysics Data System (ADS)

    Tian, Hongchun; Zhang, Sa; Hou, Zhiyun; Xia, Changming; Zhou, Guiyao; Zhang, Wei; Liu, Jiantao; Wu, Jiale; Fu, Jian

    2016-06-01

    A stable dual-wavelength ytterbium-doped photonic crystal fiber laser pumped by a 976 nm laser diode has been demonstrated at room temperature. Single-wavelength, dual-wavelength laser oscillations are observed when the fiber laser operates under different pump power by using different length of fibers. Stable dual-wavelength radiation around 1045 nm and 1075 nm has been generated simultaneously at a high pump power directly from an ytterbium-doped fiber laser without using any spectral control mechanism. A small core ytterbium-doped PCF fabricated by the powder sinter direction drawn rod technology is used as gain medium. The pump power and fiber length which can affect the output characteristics of dual-wavelength fiber laser are analyzed in the experiment. Experiments confirm that higher pump power and longer fiber length favors 1075 nm output; lower pump power and shorter fiber length favors 1045 nm output. Those results have a good reference in multi-wavelength fiber laser.

  14. Interior view of 175 ton hoist house looking at the ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Interior view of 175 ton hoist house looking at the exterior casing for the wire rope spools. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

  15. View of 175 ton hoisthouse from northeast. Hoist operator's cab ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of 175 ton hoist-house from northeast. Hoist operator's cab is in foreground center. - Marshall Space Flight Center, Saturn V Dynamic Test Facility, East Test Area, Huntsville, Madison County, AL

  16. 175. STORAGE ROOM, SOUTH WALL OF STORAGE ROOM, ADDED WITH ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. STORAGE ROOM, SOUTH WALL OF STORAGE ROOM, ADDED WITH ELEVATOR ADDITION OF 1905. WALL IS EXTERIOR OF ORIGINAL WAGON WORKS OF 1883. - Gruber Wagon Works, Pennsylvania Route 183 & State Hill Road at Red Bridge Park, Bernville, Berks County, PA

  17. 23. 175 TON CAPACITY CHARGING LADLE ON THE CHARGING AISLE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. 175 TON CAPACITY CHARGING LADLE ON THE CHARGING AISLE OF THE BOP SHOP LOOKING SOUTH. HISTORIAN FOR SCALE. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

  18. 21. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN TEEMING AISLE OF THE BOP SHOP LOOKING SOUTHEAST. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

  19. 20. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. 175 TON CAPACITY TEEMING LADLES ON THE NEAR WESTERN TEEMING AISLE OF THE BOP SHOP LOOKING SOUTHEAST. HISTORIAN FOR SCALE. - U.S. Steel Duquesne Works, Basic Oxygen Steelmaking Plant, Along Monongahela River, Duquesne, Allegheny County, PA

  20. 7 CFR 97.175 - Fees and charges.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... PLANT VARIETY AND PROTECTION Fees and Charges § 97.175 Fees and charges. The following fees and charges... responding to a request—$89.00. (r) Field inspections by a representative of the Plant Variety...

  1. 7 CFR 97.175 - Fees and charges.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... PLANT VARIETY AND PROTECTION Fees and Charges § 97.175 Fees and charges. The following fees and charges... responding to a request—$89.00. (r) Field inspections by a representative of the Plant Variety...

  2. 7 CFR 97.175 - Fees and charges.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... PLANT VARIETY AND PROTECTION Fees and Charges § 97.175 Fees and charges. The following fees and charges... responding to a request—$89.00. (r) Field inspections by a representative of the Plant Variety...

  3. 7 CFR 97.175 - Fees and charges.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... PLANT VARIETY AND PROTECTION Fees and Charges § 97.175 Fees and charges. The following fees and charges... responding to a request—$89.00. (r) Field inspections by a representative of the Plant Variety...

  4. Facility No. 175, exterior oblique view of northeast and northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, exterior oblique view of northeast and northwest sides, corner of Facility No. 176 is in background - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  5. Facility No. 175, interior overview from secondfloor corridor on northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, interior overview from second-floor corridor on northwest side - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  6. Facility No. 175, elevation of southeast side from the airfield, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, elevation of southeast side from the airfield, corner of Facility No. 176 is to the left - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  7. Facility No. 175, interior of office space on second floor ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, interior of office space on second floor of northwest side - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  8. Facility No. 175, interior detail showing rolling doors, trusses, and ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, interior detail showing rolling doors, trusses, and angled monitor roof - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  9. 47 CFR 90.175 - Frequency coordinator requirements.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175... use in § 90.531(b)(4). (16) Applications for DSRCS licenses (as well as registrations for...

  10. 47 CFR 90.175 - Frequency coordinator requirements.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175... use in § 90.531(b)(4). (16) Applications for DSRCS licenses (as well as registrations for...

  11. 47 CFR 90.175 - Frequency coordinator requirements.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175... use in § 90.531(b)(4). (16) Applications for DSRCS licenses (as well as registrations for...

  12. 47 CFR 90.175 - Frequency coordinator requirements.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175... use in § 90.531(b)(4). (16) Applications for DSRCS licenses (as well as registrations for...

  13. 47 CFR 90.175 - Frequency coordinator requirements.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... SERVICES PRIVATE LAND MOBILE RADIO SERVICES Policies Governing the Assignment of Frequencies § 90.175... use in § 90.531(b)(4). (16) Applications for DSRCS licenses (as well as registrations for...

  14. 175. Frank Deras Jr., Photographer May 1998 AERIAL ELEVATION VIEW ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. Frank Deras Jr., Photographer May 1998 AERIAL ELEVATION VIEW OF TOWER W-2, FACING NORTHWEST. - San Francisco Oakland Bay Bridge, Spanning San Francisco Bay, San Francisco, San Francisco County, CA

  15. 50 CFR 218.175 - Applications for Letters of Authorization.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Evaluation Activities in the Naval Sea System Command (NAVSEA) Naval Undersea Warfare Center (NUWC) Keyport Range Complex and the Associated Proposed Extensions Study Area § 218.175 Applications for Letters...

  16. Erbium-ytterbium-yttrium compounds for light emission at 1.54microm

    NASA Astrophysics Data System (ADS)

    Vanhoutte, Michiel

    Silicon microphotonics˙ has emerged as the leading technology to overcome the interconnect bottleneck that limits a further increase of computation power following Moore's law. Optical interconnects between different electronic microprocessors in an electronic-photonic integrated circuit (EPIC) can provide a fast, low-loss and highbandwidth alternative to electrical interconnects, which suffer from issues such as resistive heating, RC delays and channel crosstalk at an increasing device density. A crucial device in such an electronic-photonic integrated circuit is a compact, highgain and low power optical amplifier to compensate for signal attenuation due to propagation losses and to recover signal strength after subsequent 3dB splits during fanout of the optical signal to different microprocessors. Erbium ions (Er3+) are an excellent candidate to provide amplification around .. = 1.54pm for optical telecommunications. Erbium-doped fiber amplifiers (EDFAs) have already enabled long-haul optical data. transmission through silica optical fibers, but scaling down a fiber amplifier to an on-chip erbium-doped waveguide amplifier (EDWA) brings along significant materials and device design challenges. In this thesis, erbium-ytterbium oxide (Erx Yb2-xO 3) and erbium-ytterbium-yttrium silicate (ErxYhyY 2-x-ySi2O7) compounds are investigated as novel materials systems for the development of EDWAs. The high erbium and ytterbium solubility (>1022 cm-3) and refractive index (1.71 < n < 1.92) make these materials excellent candidates for compact, low-power optical amplifiers. Erx Yb2-xO 3 and ErxYhyY2-x-ySi2O 7 thin films were deposited on SiO2 and analyzed structurally and optically. The role of ytterbium in these compounds is twofold. First, ytterbium can be used as an alternative to yttrium for dilution of the erbium concentration in order to mitigate parasitic concentration quenching effects. Second, ytterbium acts as a sensitizer for erbium during optical pumping at lambda = 980nm. Comparison of the different oxide and silicate thin films reveals that the alpha-disilicate phase is the best candidate for an EDWA gain medium pumped at lambda = 980nm. By means of rate and propagation equations, the composition of an Er xYhyY2-x-ySi2O7 gain medium was optimized for application as a 3dB EDWA. The optimal composition was found to be Er0.025Yb0.200Yb0.200Y1.775Si 2O7, which provides a 1.5dB/cm gain at only 3mW of pump power. In terms of the figure of merit 3dB gain/(device area ˙ pump power), this material outperforms other EDWA materials reported in literature. (Copies available exclusively from MIT Libraries, libraries.mit.edu/docs - docs mit.edu)

  17. The design and experiment research of high brightness all-fiberized ytterbium doped laser operating near 980 nm

    NASA Astrophysics Data System (ADS)

    Wang, YanShan; Ke, WeiWei; Ma, Yi; Sun, YinHong; Li, TengLong; Wang, XiaoJun; Tang, Chun

    2015-10-01

    The effect of the pump source and the gain fiber on the output properties of ytterbium doped fiber laser (YDFL) work near 980 nm are analyzed theoretically. Base on this analysis, we design a high power all fiberized ytterbium doped laser operating near 980 nm with a core/cladding of 80/130 μm. A 980 nm YDFL experimental setup was constructed, 16.7W 980 nm fiber laser was achieved with an optical-optical conversion efficiency of 32.4%.

  18. Cladding-pumped ytterbium-doped fiber laser with radially polarized output.

    PubMed

    Lin, Di; Daniel, J M O; Gecevičius, M; Beresna, M; Kazansky, P G; Clarkson, W A

    2014-09-15

    A simple technique for directly generating a radially polarized output beam from a cladding-pumped ytterbium-doped fiber laser is reported. Our approach is based on the use of a nanograting spatially variant waveplate as an intracavity polarization-controlling element. The laser yielded ~32 W of output power (limited by available pump power) with a radially polarized TM (01)-mode output beam at 1040 nm with a corresponding slope efficiency of 66% and a polarization purity of 95%. The beam-propagation factor (M(2)) was measured to be ~1.9-2.1. PMID:26466271

  19. Broadly tunable ytterbium-doped photonic crystal fibre laser and high power superfluorescent fibre source

    NASA Astrophysics Data System (ADS)

    Wang, Bingzhang; Chen, Shengping; Wang, Jiyou; Li, Yigang; Gao, Yanli; Fan, Wande; Ding, Lei; Lu, Kecheng

    2010-11-01

    A 2.5W superfluorescent fiber source (SFS) and a tunable PCF laser with 74.4 nm tuning range and 5.5 W output power are experimentally demonstrated by utilizing an ytterbium-doped photonic crystal fiber (PCF) as the gain medium. The tunable operation of the laser is realized by rotating a diffraction grating. Effects of the degrees of the cleaved angle at the anti-reflection fiber end on the output characteristics of the laser and the SFS are investigated. A large cleaved angle is beneficial to realize a broad laser tuning range and beneficial to obtain a high power superfluorescent fiber source without parasitic lasing.

  20. Single-Polarisation, Single-Frequency, 2 cm Ytterbium-Doped Fibre Laser

    SciTech Connect

    Guan, W.; Marciante, J.R.

    2007-05-23

    A single-polarisation, single-frequency, ytterbium-doped silica fibre laser has been demonstrated in a 2 cm linear cavity. The output power reaches 35 mW with an optical signal-to-noise ratio greater than 65 dB. A polarisation-maintaining fibre Bragg grating is used as the polarisation-dependent reflector to generate the single-polarisation output with the polarisation extinction ratio greater than 20 dB. The laser works stably for two hours under laboratory conditions.

  1. Research on ytterbium-doped photonic crystal fiber amplifier for the femtosecond fiber laser

    NASA Astrophysics Data System (ADS)

    Tian, Hongchun; Hou, Zhiyun; Zhang, Sa; Zhou, Guiyao; Xia, Changming; Zhang, Wei; Wu, Jiale; liu, Hongzhan; Zheng, Yan

    2016-01-01

    We report on a single-stage, high-repetition photonic crystal fiber amplifier working at 1030 nm seeded by a femtosecond fiber laser, which generates an output with average power of 2.23 W at a repetition rate of 49.5 MHz and a 3 dB spectral width of 5 nm, corresponding to a pulse energy of 45.2 nJ. After amplification, the spectrum of the femtosecond laser is broadened. A home-made, ytterbium-doped, double-clad photonic crystal fiber fabricated by laser sintering technology combined with a solution doping method with a core diameter of only 24 μm is used as the power amplifier medium. The spectral characteristics as well as the suppression of amplified spontaneous emission are discussed in detail. Experiment confirms that the amplified spontaneous emission becomes negligible with increasing incident seed power and no obvious nonlinear effects arise in this experiment. These results can provide motivation for the application of ytterbium-doped photonic crystal fiber and can provide a potential application for the high-power, all-fiber laser in the future.

  2. Production of No-Carrier Added Lutetium-177 by Irradiation of Enriched Ytterbium-176.

    PubMed

    Tarasov, Valery A; Andreev, Oleg I; Romanov, Evgeny G; Kuznetsov, Rostislav A; Kupriyanov, Vladimir V; Tselishchev, Ivan V

    2015-01-01

    Two methods of Lu-177 production are reviewed: irradiation of isotopically enriched Lu- 176 (direct way) and irradiation of ytterbium enriched with Yb-176 (indirect way). Based on neutronphysical calculations Lu-177 yield and specific activity were estimated for both methods. Lu-177 specific activity strongly depends on neutron flux density in the direct way, that is 75,000 Ci/g for 10- days irradiation in a neutron flux of 2.10(15) cm(-2) s(-1), and only 13,000 Ci/g after 30 days irradiation at neutron flux 1.10(14) cm(-2) s(-1). Irradiation of Yb-176 provides Lu-177 specific activity close to theoretical value (110,000 Ci/g). Neutron flux density effect Lu-177 yield, that is 530 Ci/g for 2.1015 cm(-2) s(-1) neutron flux density after 30 days irradiation. A procedure of isolation and purification of Lu-177 from irradiated targets is described based on combination of galvanostatic extraction of ytterbium followed by cation-exchange chromatography from alfa-hydroxyisobutirate solutions on BioRad AG(®)50W-X8 resin. PMID:25771378

  3. Iron nano-clusters in ytterbium films: a 57Fe Mössbauer spectroscopic study

    NASA Astrophysics Data System (ADS)

    Rojas-Ayala, C.; Herrera, W. T.; Dinóla, I. S.; Kraken, M.; Passamani, E. C.; Baggio-Saitovitch, E.; Litterst, F. J.

    2014-01-01

    We have performed a Mössbauer study on iron clusters that are formed in ytterbium films prepared by vapor co-deposition onto kapton substrates kept at room temperature. The film thicknesses were chosen in a range between 2.5 and 2.8 m. XRD of the films reveals a mixture of fcc- and hcp-like ytterbium. Iron concentrations were between 0.3 and 5 at %. All samples reveal hyperfine spectra attributed to only two types of iron clusters with well defined hyperfine parameters. The clusters are supposed to be formed at boundaries of hcp- and fcc-like grains. In addition there is found a small contribution from monomeric iron. Spectra taken at 4.2 K reveal a complex distribution of magnetic hyperfine fields. The dynamic origin of the spectral shape is supported by susceptibility data revealing spin-freezing at temperatures below ca. 10 K. This proves that the iron clusters have sizes on the order of nm.

  4. Tunable triple-wavelength mode-locked ytterbium fiber laser with birefringence filter

    NASA Astrophysics Data System (ADS)

    Lv, Zhiguo; Teng, Hao; Wang, Rui; Wang, Lina; Wang, Junli; Wei, Zhiyi

    2015-10-01

    A mode-locked ytterbium fiber laser based on all normal dispersion (ANDi) technique and nonlinear polarization rotation (NPR) is investigated with birefringent plate as a spectral filter in this paper. Tunable triple-wavelength simultaneous operation is realized at central wavelengths of 1031.4, 1046.8 and 1066.5 nm, respectively. A maximum output power up to 161.4 mW is obtained at 1031.4 nm wavelength. By only changing the direction of the optical axis of the uniaxial birefringent filter, tunable range as wide as 19 nm is demonstrated. To the best of our knowledge, this is the widest tuning range and highest power reported so far for ANDi mode-locked ytterbium fiber lasers with triple-wavelength operation. Our analysis shows that the mechanism of the triple-wavelength mode-locked operation results mainly from the four-wave mixing in optical fibers; in addition, the wide gain bandwidth of Yb also plays a critical role for the stable oscillation of the third mode-locked wavelength. The energy conversion process governed by a set of four coupled equations is realized experimentally through the adjustment of the polarization controller, which is related to the phase matching.

  5. High-quality laser cutting of stainless steel in inert gas atmosphere by ytterbium fibre and CO{sub 2} lasers

    SciTech Connect

    Golyshev, A A; Malikov, A G; Orishich, A M; Shulyat'ev, V B

    2014-03-28

    Processes of cutting stainless steel by ytterbium fibre and CO{sub 2} lasers have been experimentally compared. The cut surface roughnesses for 3- and 5-mm-thick stainless steel sheets are determined. The absorption coefficient of laser radiation during cutting is measured. It is established that the power absorbed by metal during cutting by the CO{sub 2} laser exceeds that for the ytterbium laser (provided that the cutting speed remains the same). The fact that the maximum cutting speed of the CO{sub 2} laser is lower than that of the ytterbium fibre laser is explained. (laser technologies)

  6. 19 CFR 175.22 - Publication of decisions following petition.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... § 175.22 Publication of decisions following petition. (a) Incorrect appraised value, classification, or rate of duty. If the appraised value of, classification of, or rate of duty upon imported merchandise... notice to the petitioner in the Customs Bulletin shall be appraised, classified, or assessed as to...

  7. 19 CFR 175.22 - Publication of decisions following petition.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... § 175.22 Publication of decisions following petition. (a) Incorrect appraised value, classification, or rate of duty. If the appraised value of, classification of, or rate of duty upon imported merchandise... notice to the petitioner in the Customs Bulletin shall be appraised, classified, or assessed as to...

  8. 19 CFR 175.22 - Publication of decisions following petition.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... § 175.22 Publication of decisions following petition. (a) Incorrect appraised value, classification, or rate of duty. If the appraised value of, classification of, or rate of duty upon imported merchandise... notice to the petitioner in the Customs Bulletin shall be appraised, classified, or assessed as to...

  9. 19 CFR 175.22 - Publication of decisions following petition.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... § 175.22 Publication of decisions following petition. (a) Incorrect appraised value, classification, or rate of duty. If the appraised value of, classification of, or rate of duty upon imported merchandise... notice to the petitioner in the Customs Bulletin shall be appraised, classified, or assessed as to...

  10. 19 CFR 175.22 - Publication of decisions following petition.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... § 175.22 Publication of decisions following petition. (a) Incorrect appraised value, classification, or rate of duty. If the appraised value of, classification of, or rate of duty upon imported merchandise... notice to the petitioner in the Customs Bulletin shall be appraised, classified, or assessed as to...

  11. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program 3. (a) For each Program 3 process, the owner or operator shall provide the information indicated in paragraphs (b) through (p) of this section. If the same information applies to more than one covered...

  12. 175. Photocopy of drawing (1972 structural drawing by the Ralph ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. Photocopy of drawing (1972 structural drawing by the Ralph M. Parsons Company) PLANS, SECTIONS, AND DETAILS FOR MODIFICATION OF THE LSB (BLDG. 770), SHEET S-15 - Vandenberg Air Force Base, Space Launch Complex 3, Launch Pad 3 West, Napa & Alden Roads, Lompoc, Santa Barbara County, CA

  13. 175. Photocopy of Photograph (original in Roger Lewis' private collection). ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. Photocopy of Photograph (original in Roger Lewis' private collection). Photographer and date unknown. CENTER ISLAND, CRAWFORD WATER WHEEL, TWIN FALLS COUNTY, MILNER, IDAHO; LOOKING DOWNSTREAM FROM DAM SITE. - Milner Dam & Main Canal: Twin Falls Canal Company, On Snake River, 11 miles West of city of Burley, Idaho, Twin Falls, Twin Falls County, ID

  14. 25 CFR 175.50 - Obtaining rights-of-way.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... Rights-of-Way § 175.50 Obtaining rights-of-way. Where there is no existing right(s)-of-way for the utility's facilities, the customer shall be responsible for obtaining all rights-of-way necessary to...

  15. 7 CFR 400.175 - Revocation and non-acceptance.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ..., DEPARTMENT OF AGRICULTURE GENERAL ADMINISTRATIVE REGULATIONS Reinsurance Agreement-Standards for Approval; Regulations for the 1997 and Subsequent Reinsurance Years § 400.175 Revocation and non-acceptance. (a) FCIC will deny reinsurance to any insurer or will terminate any existing reinsurance agreement if any...

  16. Facility No. 175, oblique view of southeast side and southwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, oblique view of southeast side and southwest doors, corner of Facility No. 176 is on the left - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  17. Airfield setting of Facility Nos. 175 and 176, taken from ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Airfield setting of Facility Nos. 175 and 176, taken from north end of Ford Island Runway, with landplane hangars on the right - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  18. Facility No. 175, oblique view of southwest doors and northwest ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Facility No. 175, oblique view of southwest doors and northwest side, corner of Facility No. 176 is on the right - U.S. Naval Base, Pearl Harbor, Landplane Hangar Type, Wasp Boulevard and Gambier Bay Street, Pearl City, Honolulu County, HI

  19. 175. Photocopy of measured drawing (from National Record Center, Suitland, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. Photocopy of measured drawing (from National Record Center, Suitland, Maryland, R.G. 121-76-301, Box 89, No. DC 0020 ZZ 362) Buell Solon, delineator 2 December 1936 DECORATIVE PAINTING DETAILS, 'DRAWING NO. 61' - U.S. Department of the Interior, Eighteenth & C Streets Northwest, Washington, District of Columbia, DC

  20. 40 CFR 68.175 - Prevention program/Program 3.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... (CONTINUED) CHEMICAL ACCIDENT PREVENTION PROVISIONS Risk Management Plan § 68.175 Prevention program/Program... the most recent change that triggered management of change procedures and the date of the most recent review or revision of management of change procedures. (j) The date of the most recent pre-startup...

  1. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... soil and water conservation expenditures which the taxpayer may deduct under section 175 in any one... other than that upon which expenditures are made for soil or water conservation or for the prevention of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  2. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... soil and water conservation expenditures which the taxpayer may deduct under section 175 in any one... other than that upon which expenditures are made for soil or water conservation or for the prevention of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  3. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... soil and water conservation expenditures which the taxpayer may deduct under section 175 in any one... other than that upon which expenditures are made for soil or water conservation or for the prevention of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  4. 26 CFR 1.175-5 - Percentage limitation and carryover.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... soil and water conservation expenditures which the taxpayer may deduct under section 175 in any one... other than that upon which expenditures are made for soil or water conservation or for the prevention of... deduction for soil or water conservation expenditures has been taken into account in computing a...

  5. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  6. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  7. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  8. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  9. 33 CFR 175.130 - Visual distress signals accepted.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... requirements of § 175.110: (1) An electric distress light meeting the standards of 46 CFR 161.013. One is required to meet the night only requirement. (2) An orange flag meeting the standards of 46 CFR 160.072....130—Pyrotechnic Signal Devices Approval number under 46 CFR Device description Meets requirement...

  10. 175. View of the Pinnacle Lake Over look. Example of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    175. View of the Pinnacle Lake Over look. Example of location where designers placed an overlook on the outside of a curve instead of leaving the remnants of a rock cut visible. View to the south. - Blue Ridge Parkway, Between Shenandoah National Park & Great Smoky Mountains, Asheville, Buncombe County, NC

  11. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... OF THE TREASURY ALCOHOL BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  12. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... OF THE TREASURY ALCOHOL BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  13. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  14. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  15. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  16. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  17. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  18. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  19. 14 CFR 135.175 - Airborne weather radar equipment requirements.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Airborne weather radar equipment... Aircraft and Equipment § 135.175 Airborne weather radar equipment requirements. (a) No person may operate a large, transport category aircraft in passenger-carrying operations unless approved airborne...

  20. 27 CFR 25.175 - Prepayment of tax.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... OF THE TREASURY LIQUORS BEER Tax on Beer Prepayment of Tax § 25.175 Prepayment of tax. (a) General..., is insufficient for deferral of payment of tax on beer to be removed for consumption or sale, or if a... tax before any beer is removed for consumption or sale, or taken out of the brewery for removal...

  1. Bis(pentamethylcyclopentadienyl) ytterbium: Electron-transfer reactions with organotransition metal complexes

    SciTech Connect

    Matsunaga, P.T.

    1991-11-01

    The divalent lanthanide complex, (Me{sub 5}C{sub 5}){sub 2}Yb, reacts with methylcopper to produce the base-free, ytterbium-methyl complex, (Me{sub 5}C{sub 5}){sub 2}YbMe. This product forms a asymmetric, methyl-bridged dimer in the solid state. The bulky alkyl complex, (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}, displays similar chemistry to (Me{sub 5}C{sub 5}){sub 2}YbMe, but at a reduced reaction rate due to the limited accessibility of the metal in (Me{sub 5}C{sub 5}){sub 2}YbCH(SiMe{sub 3}){sub 2}. Copper and silver halide salts react with (Me{sub 5}C{sub 5}){sub 2}V to produce the trivalent halide derivatives, (Me{sub 5}C{sub 5}){sub 2}VX (X + F, Cl, Br, I). The chloride complex, (Me{sub 5}C{sub 5}){sub 2}VCl, reacts with lithium reagents to form the phenyl and borohydride species. Nitrous oxide transfers an oxygen atom to (Me{sub 5}C{sub 5}){sub 2}V producing the vanadium-oxo complex, (Me{sub 5}Ce{sub 5}){sub 2}VO. The trivalent titanium species, (Me{sub 5}C{sub 5}){sub 2}TiX (X = Cl, Br, Me, BH{sub 4}), form bimetallic coordination complexes with (Me{sub 5}C{sub 5}){sub 2}Yb. The magnetic behavior of the products indicates that electron transfer has not occurred. The solid state structures of the chloride and bromide complexes show unusual bend angles for the halide bridges between ytterbium and titanium. A model based on frontier orbital theory has been proposed to account for the bending behavior in these species. The bimetallic methyl complex contains a linear methyl bridge between ytterbium and titanium.

  2. Thermo-optical measurements of ytterbium doped ceramics (Sc2O3, Y203, Lu203, YAG) and crystals (YAG, CaF2) at cryogenic temperatures

    NASA Astrophysics Data System (ADS)

    Le Garrec, B.; Cardinali, V.; Bourdet, G.

    2013-05-01

    In this paper, we report the measurements of the specific heat, the density and the thermal diffusivity at room and cryogenic temperatures of Ytterbium doped cubic sesquioxides (Sc2O3, Y2O3, Lu2O3) ceramics and of Ytterbium doped crystals (YAG, CaF2). These materials appear to have very interesting properties for setting up high average power laser chains useful for plasma physics and for inertial fusion energy drivers.

  3. Simultaneous effects of photo- and radio- darkening in ytterbium-doped aluminosilicate fibers

    NASA Astrophysics Data System (ADS)

    Duchez, Jean-Bernard; Mady, Franck; Mebrouk, Yasmine; Benabdesselam, Mourad

    2014-10-01

    We present original characterizations of photo-radio-darkening in ytterbium-doped silica optical fibers submitted to the simultaneous action of the pump and of an ionizing radiation. We present the interplay between both radiations, showing e.g. that the pump is able to darken or bleach the fiber depending on the ionizing dose. The photo-resistance of the fiber is shown to play a crucial role on its radio-resistance, and that photo-resistant fibers should be also radio-resistant in low dose rate conditions. All the results are thoroughly explained by a physical model presented in a separate article by Mady et al. (this conference proceeding).

  4. Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms

    SciTech Connect

    Hosoya, Toshiyuki; Miranda, Martin; Inoue, Ryotaro; Kozuma, Mikio

    2015-07-15

    We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power of 40 mW and another laser diode for amplifying the laser power up to 220 mW by injection locking. The systematic method for optimization of our injection locking can also be applied to high power light sources at any other wavelengths. Our system does not depend on complex nonlinear frequency-doubling and can be made compact, which will be useful for providing light sources for laser cooling experiments including transportable optical lattice clocks.

  5. Simultaneous effects of photo- and radio- darkening in ytterbium-doped aluminosilicate fibers

    SciTech Connect

    Duchez, Jean-Bernard Mady, Franck Mebrouk, Yasmine Benabdesselam, Mourad

    2014-10-21

    We present original characterizations of photo-radio-darkening in ytterbium-doped silica optical fibers submitted to the simultaneous action of the pump and of an ionizing radiation. We present the interplay between both radiations, showing e.g. that the pump is able to darken or bleach the fiber depending on the ionizing dose. The photo-resistance of the fiber is shown to play a crucial role on its radio-resistance, and that photo-resistant fibers should be also radio-resistant in low dose rate conditions. All the results are thoroughly explained by a physical model presented in a separate article by Mady et al. (this conference proceeding)

  6. Crystal structure of hexa­aqua­dichlorido­ytterbium(III) chloride

    PubMed Central

    Knopf, Kevin M.; Crundwell, Guy; Westcott, Barry L.

    2015-01-01

    The crystal structure of the title compound, [YbCl2(H2O)6]Cl, was determined at 110 K. Samples were obtained from evaporated aceto­nitrile solutions containing the title compound, which consists of a [YbCl2(H2O)6]+ cation and a Cl− anion. The cations in the title compound sit on a twofold axis and form O—H⋯Cl hydrogen bonds with the nearby Cl− anion. The coordination geometry around the metal centre forms a distorted square anti­prism. The ytterbium complex is isotypic with the europium complex [Tambrornino et al. (2014 ▸). Acta Cryst. E70, i27]. PMID:26090164

  7. Diode-pumped 1028 nm Ytterbium-doped fiber laser with near 90% slope efficiency

    NASA Astrophysics Data System (ADS)

    Harun, S. W.; Paul, M. C.; Moghaddam, M. R. A.; Das, S.; Sen, R.; Dhar, A.; Pal, M.; Bhadra, S. K.; Ahmad, H.

    2010-03-01

    Highly efficient laser action from an Ytterbium-doped fiber (YDF) is demonstrated using a fiber Bragg grating (FBG) in conjunction with a 4% Fresnel reflection at room temperature. The YDF used is drawn from Yb2O3-doped preform, fabricated through deposition of porous layer of composition SiO2-GeO2 by the MCVD process in conjunction with a solution doping technique. The fabricated YDF has a core composition of 0.2 wt % of Yb2O3, 1.8 wt % of Al2O3 and 23 wt % of GeO2 with a pump absorption of 9.0 dB/m. The fiber laser operates at wavelength of 1028 nm with a slope efficiency of 88% with respect to the launched 976 nm pump power using the YDF length of 7 m.

  8. Arc fusion splicing effects in large-mode-area single-mode ytterbium-doped fibers.

    PubMed

    Feng, Ting; Jenkins, Micah H; Yan, Fengping; Gaylord, Thomas K

    2013-11-10

    For the first time the effects of arc fusion splicing on the residual stress and refractive index of large-mode-area single-mode ytterbium-doped fibers (YDFs) are investigated using a state-of-the-art three-dimensional concurrent stress-index measurement method. The results, based on a commercially available fiber, describe a host of perturbations that decrease the core/cladding refractive index difference by as much as 1.74 × 10(-3) over an axial length of many hundreds of wavelengths. Simulations indicate that these perturbations result in an expansion of the mode-field-diameter by 39.6% and, based on the measured sample, result in an extra splice loss of 20.8%. The results of this investigation will be useful in the design and optimization of high-power all-fiber YDF lasers and amplifiers. PMID:24216728

  9. Doppler spectroscopy of an ytterbium Bose-Einstein condensate on the clock transition

    NASA Astrophysics Data System (ADS)

    Dareau, A.; Scholl, M.; Beaufils, Q.; Döring, D.; Beugnon, J.; Gerbier, F.

    2015-02-01

    We describe Doppler spectroscopy of Bose-Einstein condensates of ytterbium atoms using a narrow optical transition. We address the optical clock transition around 578 nm between the 1S0 and the 3P0 states with a laser system locked on a high-finesse cavity. We show how the absolute frequency of the cavity modes can be determined within a few tens of kilohertz using high-resolution spectroscopy on molecular iodine. We show that optical spectra reflect the velocity distribution of expanding condensates in free fall or after release inside an optical waveguide. We demonstrate subkilohertz spectral linewidths, with long-term drifts of the resonance frequency well below 1 kHz/h. These results open the way to high-resolution spectroscopy of many-body systems.

  10. Bis(pentamethylcyclopentadienyl)ytterbium: An investigation of weak interactions in solution using multinuclear NMR spectroscopy

    SciTech Connect

    Schwartz, D.J.

    1995-07-01

    NMR spectroscopy is ideal for studying weak interactions (formation enthalpy {le}20 kcal/mol) in solution. The metallocene bis(pentamethylcyclopentadienyl)ytterbium, Cp*{sub 2}Yb, is ideal for this purpose. cis-P{sub 2}PtH{sub 2}complexes (P = phosphine) were used to produce slow-exchange Cp*{sub 2}YbL adducts for NMR study. Reversible formation of (P{sub 2}PtH){sub 2} complexes from cis-P{sub 2}PtH{sub 2} complexes were also studied, followed by interactions of Cp*{sub 2}Yb with phosphines, R{sub 3}PX complexes. A NMR study was done on the interactions of Cp*{sub 2}Yb with H{sub 2}, CH{sub 4}, Xe, CO, silanes, stannanes, C{sub 6}H{sub 6}, and toluene.

  11. Two-color magneto-optical trap with small magnetic field for ytterbium

    NASA Astrophysics Data System (ADS)

    Kawasaki, Akio; Braverman, Boris; Yu, QinQin; Vuletic, Vladan

    2015-08-01

    We report a two-color magneto-optical trap (MOT) for ytterbium atoms where the slowing and trapping functions are separately performed by the singlet transition light (6{{{s}}}2{ }1{{{S}}}0\\to 6{{s}}6{{p}}{ }1{{{P}}}1) and the triplet transition light (6{{{s}}}2{ }1{{{S}}}0\\to 6{{s}}6{{p}}{ }3{{{P}}}1), respectively. The two-color MOT is achieved by simultaneously applying laser light on both the broad-linewidth singlet transition and the narrow-linewidth triplet transition. It is highly robust against laser power imbalance even at very low magnetic field gradients, and can operate at magnetic field gradients down to 2 G cm-1 where a conventional MOT using the singlet transition is unable to trap atoms. We load and trap up to 4.0× {10}5 atoms directly from an atomic beam at 700 K.

  12. A compact ultranarrow high-power laser system for experiments with 578 nm ytterbium clock transition.

    PubMed

    Cappellini, G; Lombardi, P; Mancini, M; Pagano, G; Pizzocaro, M; Fallani, L; Catani, J

    2015-07-01

    In this paper, we present the realization of a compact, high-power laser system able to excite the ytterbium clock transition at 578 nm. Starting from an external-cavity laser based on a quantum dot chip at 1156 nm with an intra-cavity electro-optic modulator, we were able to obtain up to 60 mW of visible light at 578 nm via frequency doubling. The laser is locked with a 500 kHz bandwidth to an ultra-low-expansion glass cavity stabilized at its zero coefficient of thermal expansion temperature through an original thermal insulation and correction system. This laser allowed the observation of the clock transition in fermionic (173)Yb with a <50 Hz linewidth over 5 min, limited only by a residual frequency drift of some 0.1 Hz/s. PMID:26233360

  13. Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms.

    PubMed

    Hosoya, Toshiyuki; Miranda, Martin; Inoue, Ryotaro; Kozuma, Mikio

    2015-07-01

    We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power of 40 mW and another laser diode for amplifying the laser power up to 220 mW by injection locking. The systematic method for optimization of our injection locking can also be applied to high power light sources at any other wavelengths. Our system does not depend on complex nonlinear frequency-doubling and can be made compact, which will be useful for providing light sources for laser cooling experiments including transportable optical lattice clocks. PMID:26233359

  14. Injection locking of a high power ultraviolet laser diode for laser cooling of ytterbium atoms

    NASA Astrophysics Data System (ADS)

    Hosoya, Toshiyuki; Miranda, Martin; Inoue, Ryotaro; Kozuma, Mikio

    2015-07-01

    We developed a high-power laser system at a wavelength of 399 nm for laser cooling of ytterbium atoms with ultraviolet laser diodes. The system is composed of an external cavity laser diode providing frequency stabilized output at a power of 40 mW and another laser diode for amplifying the laser power up to 220 mW by injection locking. The systematic method for optimization of our injection locking can also be applied to high power light sources at any other wavelengths. Our system does not depend on complex nonlinear frequency-doubling and can be made compact, which will be useful for providing light sources for laser cooling experiments including transportable optical lattice clocks.

  15. A compact ultranarrow high-power laser system for experiments with 578 nm ytterbium clock transition

    NASA Astrophysics Data System (ADS)

    Cappellini, G.; Lombardi, P.; Mancini, M.; Pagano, G.; Pizzocaro, M.; Fallani, L.; Catani, J.

    2015-07-01

    In this paper, we present the realization of a compact, high-power laser system able to excite the ytterbium clock transition at 578 nm. Starting from an external-cavity laser based on a quantum dot chip at 1156 nm with an intra-cavity electro-optic modulator, we were able to obtain up to 60 mW of visible light at 578 nm via frequency doubling. The laser is locked with a 500 kHz bandwidth to an ultra-low-expansion glass cavity stabilized at its zero coefficient of thermal expansion temperature through an original thermal insulation and correction system. This laser allowed the observation of the clock transition in fermionic 173Y b with a <50 Hz linewidth over 5 min, limited only by a residual frequency drift of some 0.1 Hz/s.

  16. Single-frequency ytterbium-doped fiber laser at 976 nm

    NASA Astrophysics Data System (ADS)

    Zhu, X.; Shi, W.; Zong, J.; Nguyen, D.; Norwood, R. A.; Chavez-Pirson, A.; Peyghambarian, N.

    2013-02-01

    Linearly polarized wavelength stable single frequency ytterbium (Yb3+) doped fiber lasers below 1 μm, namely threelevel Yb3+ fiber lasers, are highly demanded for nonlinear wavelength conversion to generate coherent blue light or even deep ultraviolet coherent sources. We present performance of a 976 nm single-frequency core-pumped distributed Bragg reflector (DBR) fiber laser consisting of a 2-cm long highly ytterbium-doped phosphate fiber and a pair of silica fiber Bragg gratings (FBGs) and their use for frequency doubling experiment. The high reflection (HR > 99%) and partial reflection (PR = 60%) FBGs were cleaved very close to the index modulation region and directly spliced to a 2-cm-long highly Yb3+-doped phosphate fiber. Over 100 mW of linearly polarized output with a linewidth less than 2 kHz can be obtained when the launched pump power is about 450 mW. The efficiency of the 976 nm single-frequency fiber laser (the output power vs the launched pump power) is about 25%. The relative intensity noise was measured to be -110 dB/Hz at 1 MHz and the variation of the center wavelength is less than 0.0005 nm during a measurement period of 2.5 hours. This single-frequency fiber laser has an SNR of over 50 dB and there is no strong ASE or spurious lasing at long wavelengths even at the maximum pump power. This all-fiber single-frequency DBR laser with attractive features can be used for efficient blue and UV generation through nonlinear frequency conversion. Moreover, this high-performance 976 nm single-frequency fiber laser can be used as a single-frequency, low RIN pump laser for long wavelength Yb3+-, Er3+-, or Yb3+/Er3+-doped fiber lasers and amplifiers.

  17. The dawn of computer-assisted robotic osteotomy with ytterbium-doped fiber laser.

    PubMed

    Sotsuka, Yohei; Nishimoto, Soh; Tsumano, Tomoko; Kawai, Kenichiro; Ishise, Hisako; Kakibuchi, Masao; Shimokita, Ryo; Yamauchi, Taisuke; Okihara, Shin-ichiro

    2014-05-01

    Currently, laser radiation is used routinely in medical applications. For infrared lasers, bone ablation and the healing process have been reported, but no laser systems are established and applied in clinical bone surgery. Furthermore, industrial laser applications utilize computer and robot assistance; medical laser radiations are still mostly conducted manually nowadays. The purpose of this study was to compare the histological appearance of bone ablation and healing response in rabbit radial bone osteotomy created by surgical saw and ytterbium-doped fiber laser controlled by a computer with use of nitrogen surface cooling spray. An Ytterbium (Yb)-doped fiber laser at a wavelength of 1,070 nm was guided by a computer-aided robotic system, with a spot size of 100 μm at a distance of approximately 80 mm from the surface. The output power of the laser was 60 W at the scanning speed of 20 mm/s scan using continuous wave system with nitrogen spray level 0.5 MPa (energy density, 3.8 × 10(4) W/cm(2)). Rabbits radial bone osteotomy was performed by an Yb-doped fiber laser and a surgical saw. Additionally, histological analyses of the osteotomy site were performed on day 0 and day 21. Yb-doped fiber laser osteotomy revealed a remarkable cutting efficiency. There were little signs of tissue damage to the muscle. Lased specimens have shown no delayed healing compared with the saw osteotomies. Computer-assisted robotic osteotomy with Yb-doped fiber laser was able to perform. In rabbit model, laser-induced osteotomy defects, compared to those by surgical saw, exhibited no delayed healing response. PMID:24241973

  18. Creation of quantum-degenerate gases of ytterbium in a compact 2D-/3D-magneto-optical trap setup

    SciTech Connect

    Doerscher, Soeren; Thobe, Alexander; Hundt, Bastian; Kochanke, Andre; Le Targat, Rodolphe; Windpassinger, Patrick; Becker, Christoph; Sengstock, Klaus

    2013-04-15

    We report on the first experimental setup based on a 2D-/3D-magneto-optical trap (MOT) scheme to create both Bose-Einstein condensates and degenerate Fermi gases of several ytterbium isotopes. Our setup does not require a Zeeman slower and offers the flexibility to simultaneously produce ultracold samples of other atomic species. Furthermore, the extraordinary optical access favors future experiments in optical lattices. A 2D-MOT on the strong {sup 1}S{sub 0}{yields}{sup 1}P{sub 1} transition captures ytterbium directly from a dispenser of atoms and loads a 3D-MOT on the narrow {sup 1}S{sub 0}{yields}{sup 3}P{sub 1} intercombination transition. Subsequently, atoms are transferred to a crossed optical dipole trap and cooled evaporatively to quantum degeneracy.

  19. Charge-transfer state excitation as the main mechanism of the photodarkening process in ytterbium-doped aluminosilicate fibres

    SciTech Connect

    Bobkov, K K; Rybaltovsky, A A; Vel'miskin, V V; Likhachev, M E; Bubnov, M M; Dianov, E M; Umnikov, A A; Gur'yanov, A N; Vechkanov, N N; Shestakova, I A

    2014-12-31

    We have studied photodarkening in ytterbium-doped fibre preforms with an aluminosilicate glass core. Analysis of their absorption and luminescence spectra indicates the formation of stable Yb{sup 2+} ions in the glass network under IR laser pumping at a wavelength λ = 915 nm and under UV irradiation with an excimer laser (λ = 193 nm). We have performed comparative studies of the luminescence spectra of the preforms and crystals under excitation at a wavelength of 193 nm. The mechanism behind the formation of Yb{sup 2+} ions and aluminium – oxygen hole centres (Al-OHCs), common to ytterbium-doped YAG crystals and aluminosilicate glass, has been identified: photoinduced Yb{sup 3+} charge-transfer state excitation. (optical fibres)

  20. Ytterbium-doped fibre laser tunable in the range 1017 - 1040 nm with second-harmonic generation

    SciTech Connect

    Dontsova, E I; Kablukov, S I; Babin, Sergei A

    2013-05-31

    A cladding-pumped ytterbium-doped fibre laser has been tuned to shorter emission wavelengths (from 1040 to 1017 nm). The laser output power obtained has been compared to calculation results. We have studied frequency doubling of the laser in a KTiOPO{sub 4} (KTP) crystal with type II phase matching in the XY plane and demonstrated wavelength tuning in the range 510 - 520 nm. (lasers)

  1. Investigation of the vapour-plasma plume in the welding of titanium by high-power ytterbium fibre laser radiation

    NASA Astrophysics Data System (ADS)

    Bykovskiy, D. P.; Petrovskii, V. N.; Uspenskiy, S. A.

    2015-03-01

    The vapour-plasma plume produced in the welding of 6-mm thick VT-23 titanium alloy plates by ytterbium fibre laser radiation of up to 10 kW power is studied in the protective Ar gas medium. High-speed video filming of the vapour-plasma plume is used to visualise the processes occurring during laser welding. The coefficient of inverse bremsstrahlung by the welding plasma plume is calculated from the data of the spectrometric study.

  2. Microstructure, toughness and flexural strength of self-reinforced silicon nitride ceramics doped with yttrium oxide and ytterbium oxide.

    PubMed

    Zheng, Y. S.; Knowles, K. M.; Vieira, J. M.; Lopes, A. B.; Oliveira, F. J.

    2001-02-01

    Self-reinforced silicon nitride ceramics with additions of either yttrium oxide or ytterbium oxide have been investigated at room temperature after various processing heat treatments. Devitrification of the intergranular phase in these materials is very sensitive to the heat treatment used during processing and does not necessarily improve their strength and toughness. Hot-pressed ceramics without a subsequent devitrification heat treatment were the strongest. The ytterbium oxide-doped silicon nitride ceramics were consistently tougher, but less strong, than the yttrium oxide-doped silicon nitride ceramics. In all the ceramics examined, the fracture toughness showed evidence for R-curve behaviour. This was most significant in pressureless sintered ytterbium oxide-doped silicon nitride ceramics. A number of toughening mechanisms, including crack deflection, bridging, and fibre-like grain pull-out, were observed during microstructural analysis of the ceramics. In common with other silicon nitride-based ceramics, thin amorphous films were found at the grain boundaries in each of the ceramics examined. Arrays of dislocations left in the elongated silicon nitride grains after processing were found to belong to the {101;0}<0001> primary slip system. PMID:11207926

  3. 48 CFR 217.175 - Multiyear contracts for electricity from renewable energy sources.

    Code of Federal Regulations, 2010 CFR

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    Code of Federal Regulations, 2011 CFR

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    Code of Federal Regulations, 2010 CFR

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    Code of Federal Regulations, 2012 CFR

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    Code of Federal Regulations, 2010 CFR

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    Code of Federal Regulations, 2010 CFR

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    Code of Federal Regulations, 2011 CFR

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    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 1 2012-10-01 2012-10-01 false Alaska Peninsula, AK to Nunivak, AK. 7.175 Section 7.175 Shipping COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PROCEDURES APPLICABLE TO THE PUBLIC BOUNDARY LINES Alaska § 7.175 Alaska Peninsula, AK to Nunivak, AK. (a) A line drawn from the northernmost extremity...

  1. 33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 33 Navigation and Navigable Waters 2 2014-07-01 2014-07-01 false Black Rock Canal and Lock at Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PORTS AND WATERWAYS SAFETY INLAND WATERWAYS NAVIGATION REGULATIONS § 162.175 Black Rock Canal and Lock at Buffalo,...

  2. 25 CFR 1000.175 - What is the process for conducting the negotiation phase?

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 25 Indians 2 2011-04-01 2011-04-01 false What is the process for conducting the negotiation phase? 1000.175 Section 1000.175 Indians OFFICE OF THE ASSISTANT SECRETARY, INDIAN AFFAIRS, DEPARTMENT OF THE... Funding Agreements § 1000.175 What is the process for conducting the negotiation phase? (a) Within 30...

  3. 25 CFR 1000.175 - What is the process for conducting the negotiation phase?

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 25 Indians 2 2013-04-01 2013-04-01 false What is the process for conducting the negotiation phase? 1000.175 Section 1000.175 Indians OFFICE OF THE ASSISTANT SECRETARY, INDIAN AFFAIRS, DEPARTMENT OF THE... Funding Agreements § 1000.175 What is the process for conducting the negotiation phase? (a) Within 30...

  4. 26 CFR 1.175-1 - Soil and water conservation expenditures; in general.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 3 2013-04-01 2013-04-01 false Soil and water conservation expenditures; in general. 1.175-1 Section 1.175-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.175-1 Soil and...

  5. 26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 3 2013-04-01 2013-04-01 false Definition of soil and water conservation expenditures. 1.175-2 Section 1.175-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.175-2 Definition...

  6. 26 CFR 1.175-2 - Definition of soil and water conservation expenditures.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Definition of soil and water conservation expenditures. 1.175-2 Section 1.175-2 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.175-2 Definition...

  7. 26 CFR 1.175-1 - Soil and water conservation expenditures; in general.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Soil and water conservation expenditures; in general. 1.175-1 Section 1.175-1 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE TREASURY (CONTINUED) INCOME TAX (CONTINUED) INCOME TAXES (CONTINUED) Itemized Deductions for Individuals and Corporations (continued) § 1.175-1 Soil and...

  8. Shape difference implied by quenched Coriolis interaction in 175Os

    NASA Astrophysics Data System (ADS)

    Dracoulis, G. D.; Fabricius, B.

    1990-06-01

    Chance near degeneracy of rotational states in the 1/2-[521] and 5/2-[512] bands in 175Os leads to mixing and connecting E2 transitions. Analysis of the observed branching ratios gives an interaction matrix element of about 4 keV, an order of magnitude smaller than the expected Coriolis interaction, deduced from particle-rotor calculations. A difference in deformation of 25% between the two configurations, as suggested by the larger unperturbed moment of inertia in the 1/2-[521] band, would explain the quenched interaction.

  9. Development of ytterbium-doped oxyfluoride glasses for laser cooling applications

    PubMed Central

    Krishnaiah, Kummara Venkata; Soares de Lima Filho, Elton; Ledemi, Yannick; Nemova, Galina; Messaddeq, Younes; Kashyap, Raman

    2016-01-01

    Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb3+) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb3+ concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb3+: glass and decreases with increasing Yb3+ concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm3+ and Er3+ ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb3+: 2F5/2 → 2F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb3+ with increasing Yb3+ concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed. PMID:26915817

  10. Performance of organic photovoltaics using an ytterbium trifluoride n-type buffer layer

    NASA Astrophysics Data System (ADS)

    Ji, Chan Hyuk; Jang, Ji Min; Oh, Se Young

    2016-03-01

    Ytterbium trifluoride (YbF3) was used as an n-type cathode buffer layer in conventional poly(3-hexylthiophene):[6,6]-phenyl C61 butyric acid methyl ester (P3HT:PC60BM) bulk heterojunction (BHJ) organic photovoltaic cells. This buffer layer acts as an electron-transport layer and improves the open circuit voltage ( V oc), power conversion efficiency (PCE), and interfacial durability of the device. The physical properties and performance of the device were studied using impedance spectroscopy, photocurrent measurements, ultraviolet photoelectron spectroscopy, and atomic force microscopy. The PCE reached to 3.2% with a 65% fill factor under 1 sun irradiation. The PCE decreased to half of its original value after 120 h at room temperature in air or 24 h at 70°C in air. Comparison with Yb and TiOx cathode buffer layers reveals that YbF3 has superior performance and longevity. These findings suggest that YbF3 has the potential to replace costly device encapsulation. [Figure not available: see fulltext.

  11. Un nouveau cristal laser largement accordable le BOYS dopé à l'ytterbium

    NASA Astrophysics Data System (ADS)

    Chénais, S.; Druon, F.; Balembois, F.; Georges, P.; Gaumé, R.; Aka, G.; Viana, B.; Vivien, D.

    2002-06-01

    Nous avons étudié les performances laser en pompage par diode de puissance d'un nouveau cristal : le Sr3Y(BO3)3 (acronyme : BOYS), dopé à l'ytterbium. Son spectre d'émission particulièrement large en fait un matériau particulièrement prometteur pour la réalisation de lasers femtosecondes directement pompés par diode. Ses performances ont été comparées à celles d'un verre phosphate ainsi qu'à celles du cristal d' Yb:GdCOB dans les mêmes conditions. Nous démontrons que, tant du point de vue de l'efficacité laser que de la tenue aux fortes puissances, GdCOB et BOYS sont supérieurs au verre ; le BOYS est de surcroît plus accordable (sur 50 nm), mais son comportement thermique limite a priori son usage à des puissances de pompe modérées.

  12. Theoretical and experimental research of supercontinuum generation in an ytterbium-doped fiber amplifier.

    PubMed

    Lei, Chengmin; Jin, Aijun; Song, Rui; Chen, Zilun; Hou, Jing

    2016-05-01

    The theoretical research of supercontinuum (SC) generation in a fiber amplifier system has been seldom reported. For the purpose of further understanding the mechanism of SC generation in fiber amplifiers, we propose a combined numerical model of the laser rate equations and the generalized non-linear Schrödinger equation to simulate the amplification of 1060 nm picosecond pulses and their spectral broadening in an ytterbium-doped fiber amplifier. The calculation results of this model are compared with the experimental results under the same conditions and a good agreement is achieved. We find that the pulse is gain amplified initially, and then dominated by stimulated Raman scattering in the normal dispersion region. In anomalous dispersion region, modulation instability, higher-order soliton fission and soliton self-frequency shift dominates the spectral broadening. It is found numerically and experimentally that the length of the gain fiber and the 976 nm pump power are the most imperative parameters to control the output power, spectral range and flatness of the SC. The pulse width of signal pulse also plays a part in influencing SC generation. The results verify that our model is promising for analyzing the physical processes of pulse evolution and SC generation in a fiber amplifier system. PMID:27137540

  13. Hydration of gas-phase ytterbium ion complexes studied by experiment and theory

    SciTech Connect

    Rutkowski, Philip X; Michelini, Maria C.; Bray, Travis H.; Russo, Nino; Marcalo, Joaquim; Gibson, John K.

    2011-02-11

    Hydration of ytterbium (III) halide/hydroxide ions produced by electrospray ionization was studied in a quadrupole ion trap mass spectrometer and by density functional theory (DFT). Gas-phase YbX{sub 2}{sup +} and YbX(OH){sup +} (X = OH, Cl, Br, or I) were found to coordinate from one to four water molecules, depending on the ion residence time in the trap. From the time dependence of the hydration steps, relative reaction rates were obtained. It was determined that the second hydration was faster than both the first and third hydrations, and the fourth hydration was the slowest; this ordering reflects a combination of insufficient degrees of freedom for cooling the hot monohydrate ion and decreasing binding energies with increasing hydration number. Hydration energetics and hydrate structures were computed using two approaches of DFT. The relativistic scalar ZORA approach was used with the PBE functional and all-electron TZ2P basis sets; the B3LYP functional was used with the Stuttgart relativistic small-core ANO/ECP basis sets. The parallel experimental and computational results illuminate fundamental aspects of hydration of f-element ion complexes. The experimental observations - kinetics and extent of hydration - are discussed in relationship to the computed structures and energetics of the hydrates. The absence of pentahydrates is in accord with the DFT results, which indicate that the lowest energy structures have the fifth water molecule in the second shell.

  14. Gamma-radiation-induced degradation of actively pumped single-mode ytterbium-doped optical fibers

    NASA Astrophysics Data System (ADS)

    Singleton, B.; Petrosky, J.; Pochet, M.; Usechak, N. G.; Francis, S. A.

    2014-03-01

    The integration of optical components into the digital processing units of satellite subsystems has the potential to remove interconnect bottlenecks inherent to the volume, mass, complexity, reliability and crosstalk issues of copper-based interconnects. Assuming on-board high-bandwidth communications will utilize passive optical fibers as a communication channel, this work investigates the impact of gamma irradiation from a Co-60 source on both passive optical fibers and ytterbium-doped single-mode fibers operated as amplifiers for a 1060-nm light source. Standard optical patch cables were evaluated along with active Yb-doped double-clad fibers. Varied exposure times and signal transmission wavelengths were used to investigate the degradation of the fibers exposed to total doses above 100 krad (Si). The effect on the amplified signal gain was studied for the Yb-doped fibers. The increased attenuation in the fibers across a broad wavelength range in response to multiple levels of gamma radiation exposure along with the effect that the increased attenuation has on the actively pumped Yb-doped fiber amplifier performance, is discussed.

  15. Coqblin-Schrieffer model for an ultracold gas of ytterbium atoms with metastable state

    NASA Astrophysics Data System (ADS)

    Kuzmenko, Igor; Kuzmenko, Tetyana; Avishai, Yshai; Jo, Gyu-Boong

    2016-03-01

    Motivated by the impressive recent advance in manipulating cold ytterbium atoms, we explore and substantiate the feasibility of realizing the Coqblin-Schrieffer model in a gas of cold fermionic 173Yb atoms. Making use of different AC polarizabillity of the electronic ground state (electronic configuration S10) and the long lived metastable state (electronic configuration P30), it is substantiated that the latter can be localized and serve as a magnetic impurity while the former remains itinerant. The exchange mechanism between the itinerant S10 and the localized P30 atoms is analyzed and shown to be antiferromagnetic. The ensuing SU(6) symmetric Coqblin-Schrieffer Hamiltonian is constructed, and, using the calculated exchange constant J , perturbative renormalization group (RG) analysis yields the Kondo temperature TK that is experimentally accessible. A number of thermodynamic measurable observables are calculated in the weak-coupling regime T >TK (using perturbative RG analysis) and in the strong-coupling regime T

  16. Development of ytterbium-doped oxyfluoride glasses for laser cooling applications

    NASA Astrophysics Data System (ADS)

    Krishnaiah, Kummara Venkata; Soares de Lima Filho, Elton; Ledemi, Yannick; Nemova, Galina; Messaddeq, Younes; Kashyap, Raman

    2016-02-01

    Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb3+) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb3+ concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb3+: glass and decreases with increasing Yb3+ concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm3+ and Er3+ ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb3+: 2F5/2 → 2F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb3+ with increasing Yb3+ concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed.

  17. Dose distributions and dose rate constants for new ytterbium-169 brachytherapy seeds.

    PubMed

    MacPherson, M S; Battista, J J

    1995-01-01

    Relative dose distributions in the vicinities of two new prototypes of ytterbium-169 brachytherapy sources have been measured using lithium fluoride thermoluminescent dosimeters (TLD) placed in a solid water phantom. The type 6 seed consists of four Yb2O3 spheres contained in a 0.075-mm thick titanium tube, with overall dimensions of 4.5 mm in length and 0.8 mm in diameter. The type 8 seed contains a cylindrical segment of Yb wire, 2.5 mm long, sealed in a 0.075-mm thick titanium tube 4 mm in length and 0.5 mm in diameter. The relative dose distributions, measured with TLD, were compared with those predicted by Monte Carlo simulations (MCNP code). Experimental and theoretical dose distributions were generally in agreement within 5% of the local dose value. Source strength was determined from activity measurements using a high purity germanium (HPGe) spectrometer. With source strengths established, thermoluminescence was then used to measure the dose rate constant, lambda 0, for the type 8 seed. The measured lambda 0 of 1.34 +/- 0.10 cGy U-1 for the type 8 seed agrees, within statistical uncertainty, with the value of 1.25 +/- 0.05 cGy U-1 predicted through Monte Carlo simulation. Comparisons are made with experimental data reported by other investigators. PMID:7715573

  18. Synthesis and photocatalytic activity of ytterbium-doped titania/diatomite composite photocatalysts

    NASA Astrophysics Data System (ADS)

    Tang, Wenjian; Qiu, Kehui; Zhang, Peicong; Yuan, Xiqiang

    2016-01-01

    Ytterbium-doped titanium dioxide (Yb-TiO2)/diatomite composite materials with different Yb concentrations were prepared by sol-gel method. The phase structure, morphology, and chemical composition of the as-prepared composites were well characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy (SEM), and ultraviolet-visible (UV-vis) diffuse reflection spectroscopy. The XRD and Raman spectroscopy analysis indicated that the TiO2 existed in the form of pure anatase in the composites. The SEM images exhibited the well deposition and dispersion of TiO2 nanoparticles with little agglomeration on the surfaces of diatoms. The UV-vis diffuse reflection spectra showed that the band gap of TiO2 could be narrowed by the introduction of Yb species, which was further affected by doping concentration of Yb. The photocatalytic activity of synthesized samples was investigated by the degradation of methylene blue (MB) under UV light irradiation. It was observed that the photocatalytic degradation followed a pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. Compared to TiO2 and TiO2/diatomite, the Yb-TiO2/diatomite composites exhibited higher photocatalytic activity toward degradation of MB using UV light irradiation.

  19. An Early Investigation of Ytterbium Nanocolloids for Selective and Quantitative Multi-color Spectral CT Imaging

    PubMed Central

    Pan, Dipanjan; Schirra, Carsten O.; Senpan, Angana; Schmieder, Anne H.; Stacy, Allen J.; Roessl, Ewald; Thran, Axel; Wickline, Samuel A.; Proska, Roland; Lanza, Gregory M.

    2012-01-01

    We report a novel molecular imaging agent based on Ytterbium (Yb) designed for use with Spectral multi-color Computed Tomogrphy (CT). Spectral CT or multi-ycolored CT provides all of the benefits of traditional CT, i.e., rapid tomographic X-ray imaging, but in addition, it simultaneously discriminates metal-rich contrast agents based on the elements unique x-ray K-edge energy signature. Our synthetic approach involved the use of organically soluble Yb(III)-complex to produce nanocolloids of Yb of noncrystalline nature incorporating high density of Yb (>500K/nanoparticle) into a stable metal particle. The resultant particles are constrained to vasculature (~200nm) and are highly selective for binding fibrin in the ruptured atherosclerotic plaque. Nanoparticles exhibited excellent signal sensitivity and the spectral CT technique uniquely discriminates the k-edge signal (60keV) of Yb from calcium (bones). Bio-elimination and preliminary bio-distribution studied reflected the overall safety and defined clearance of these particles in a rodent model. PMID:22385324

  20. Deep hole penetration of rock for oil production using ytterbium fiber laser

    NASA Astrophysics Data System (ADS)

    Batarseh, Samih I.; Gahan, Brian C.; Sharma, Bhargav C.; Gowelly, Sherif I.

    2004-09-01

    This study provides experimental results in investigating the use of a 5.34 kW ytterbium-doped multiclad fiber laser with an emission wavelength of 1.07 microns for creating deep hole configurations in different types of rock for production applications in oil and gas wells. Recent developments in high power fiber lasers offer technical advantages when compared to other industrial lasers that may now allow economic subsurface applications to rock formations, delivering the beam through optical fiber from the surface via the wellbore. Successful applications in this manner would provide an alternative to conventional methods that employ rotary drilling and shaped charge explosives. Various parameters affecting laser penetration into samples of sandstone and limestone were studied and optimized. A maximum penetration depth of 30 cm for 8.9-mm hole diameter was achieved in limestone, while 15 cm penetration depth was achieved in sandstone with the same hole diameter. In all cases, the hole diameter was no greater than the beam diameter applied.

  1. Ablation of oxide materials and production of nanopowders by ytterbium fiber laser

    NASA Astrophysics Data System (ADS)

    Osipov, Vladimir V.; Lisenkov, Vasily V.; Platonov, Vladislav V.

    2015-03-01

    In this paper, laser radiation action on Nd3+:Y2O3 targets having the absorption 13-1.7 × 103 cm-1 is studied. During the experiment, we used the ytterbium fiber laser, which can operate both in continuous and pulse mode with the pulse duration time 0.1-1.9 ms. Laser radiation power was 200-700 W, and power density was (0.2-1.2) × 106 W/cm2. We found out the spike behavior of laser plume luminescence, large statistical variability of delay time of laser plume appearance, and spallation of front surface of the target. Aiming to explain these facts, we developed the numeric model of radiation impact on substance with non-uniform absorption coefficient. We found out the optimal laser oblation mode for nanopowder production. At laser power of 700 W, we received Nd3+:Y2O3 nanopowder with productivity up to 27 g/h. Average size of nanoparticles is 13.6 nm, and their phase is monoclinic.

  2. Laser system for Doppler cooling of ytterbium ion in an optical frequency standard

    SciTech Connect

    Chepurov, S V; Lugovoy, A A; Kuznetsov, S N

    2014-06-30

    A laser system for Doppler cooling of ytterbium ion on the {sup 2}S{sub 1/2} → {sup 2}P{sub 1/2} transition in a single-ion optical frequency standard is developed. The second harmonic of a semiconductor laser with a wavelength of 739 nm is used for cooling. The laser frequency is doubled in a nonlinear BiBO crystal embedded in a ring resonator, which also serves as a reference for laser frequency stabilisation. Second-harmonic power of ∼100 μW is generated at a wavelength of 369.5 nm. Diode laser radiation is modulated by an electro-optic modulator at 14.75 GHz to generate a sideband exciting the {sup 2}S{sub 1/2} (F = 0) → {sup 2}P{sub 1/2} (F = 1) hyperfine component of the cooling transition that is not excited by resonant cooling light. The sideband relative intensity of a few percent proved to be sufficient to reduce the ion dwelling time in the {sup 2}S{sub 1/2} (F = 0) state to less than 10{sup -4} s and increase the cooling efficiency. (extreme light fields and their applications)

  3. Development of ytterbium-doped oxyfluoride glasses for laser cooling applications.

    PubMed

    Krishnaiah, Kummara Venkata; Soares de Lima Filho, Elton; Ledemi, Yannick; Nemova, Galina; Messaddeq, Younes; Kashyap, Raman

    2016-01-01

    Oxyfluoride glasses doped with 2, 5, 8, 12, 16 and 20 mol% of ytterbium (Yb(3+)) ions have been prepared by the conventional melt-quenching technique. Their optical, thermal and thermo-mechanical properties were characterized. Luminescence intensity at 1020 nm under laser excitation at 920 nm decreases with increasing Yb(3+) concentration, suggesting a decrease in the photoluminescence quantum yield (PLQY). The PLQY of the samples was measured with an integrating sphere using an absolute method. The highest PLQY was found to be 0.99(11) for the 2 mol% Yb(3+): glass and decreases with increasing Yb(3+) concentration. The mean fluorescence wavelength and background absorption of the samples were also evaluated. Upconversion luminescence under 975 nm laser excitation was observed and attributed to the presence of Tm(3+) and Er(3+) ions which exist as impurity traces with YbF3 starting powder. Decay curves for the Yb(3+): (2)F5/2 → (2)F7/2 transition exhibit single exponential behavior for all the samples, although lifetime decrease was observed for the excited level of Yb(3+) with increasing Yb(3+) concentration. Also observed are an increase in the PLQY and a slight decrease in lifetime with increasing the pump power. Finally, the potential of these oxyfluoride glasses with high PLQY and low background absorption for laser cooling applications is discussed. PMID:26915817

  4. Digital-wavelength ytterbium fiber laser mode-locked with MoS2

    NASA Astrophysics Data System (ADS)

    Wang, Shiwei; Zhou, Yan; Wang, Yao; Yan, Shuo; Li, Yue; Zheng, Wanguo; Deng, Ying; Zhu, Qihua; Xu, Jianqiu; Tang, Yulong

    2016-05-01

    In this letter, we report a digital-wavelength ytterbium-doped fiber laser passively mode-locked with layered molybdenum disulfide (MoS2). The MoS2 based saturable absorber (SA) is made by solution coating the MoS2 solution on a gold mirror, showing modulation depth and saturation intensity of 11.4% and 1.37 MW cm‑2, respectively. The output pulse has duration of ~300 ps, 3 dB spectral width of ~0.5 nm and maximum output power of 2.6 mW. The mode-locked fundamental frequency is 2.67 MHz with a ~36 dB signal-to-noise ratio. Through tuning the polarization controller (PC) and squeezing/stretching the single mode fiber in the ring cavity, four-bit digital wavelength emission is achieved. It is proposed that the digital-wavelength tuning feature of fiber lasers can be employed in coding and signal processing.

  5. Flux growth of Yb(6.6)Ir(6)Sn(16) having mixed-valent ytterbium.

    PubMed

    Peter, Sebastian C; Subbarao, Udumula; Rayaprol, Sudhindra; Martin, Joshua B; Balasubramanian, Mahalingam; Malliakas, Christos D; Kanatzidis, Mercouri G

    2014-07-01

    The compound Yb6.6Ir6Sn16 was obtained as single crystals in high yield from the reaction of Yb with Ir and Sn run in excess indium. Single-crystal X-ray diffraction analysis shows that Yb6.6Ir6Sn16 crystallizes in the tetragonal space group P42/nmc with a = b = 9.7105(7) Å and c = 13.7183(11) Å. The crystal structure is composed of a [Ir6Sn16] polyanionic network with cages in which the Yb atoms are embedded. The Yb sublattice features extensive vacancies on one crystallographic site. Magnetic susceptibility measurements on single crystals indicate Curie-Weiss law behavior <100 K with no magnetic ordering down to 2 K. The magnetic moment within the linear region (<100 K) is 3.21 μB/Yb, which is ∼70% of the expected value for a free Yb(3+) ion suggesting the presence of mixed-valent ytterbium atoms. X-ray absorption near edge spectroscopy confirms that Yb6.6Ir6Sn16 exhibits mixed valence. Resistivity and heat capacity measurements for Yb6.6Ir6Sn16 indicate non-Fermi liquid metallic behavior. PMID:24921221

  6. PENTAMETHYLCYCLOPENTADIENYL DERIVATIVES OF THE TRIVALENT LANTHANIDE ELEMENTS (NEODYMIUM, SAMARIUM, AND YTTERBIUM)

    SciTech Connect

    Tilley, T. Don; Andersen, R.A.

    1980-07-01

    The anionic complexes of the type (ML{sub x})(Me{sub 5}C{sub 5}){sub 2}M'Cl{sub 2}, where M is lithium or sodium, L is diethyl ether or N,N,-N{prime},N{prime}-tetramethylethylenediamine, and M{prime} is neodymium, samarium, or ytterbium, have been prepared from the metal trichlorides and the pentamethylcyclopentadienide anion. The neutral species (Me{sub 5}C{sub 5}){sub 2}NdCl(THF), (Me{sub 5}C{sub 5}){sub 2}NdN(SiMe{sub 3}){sub 2}, and (Me{sub 5}C{sub 5}){sub 2}YbCl(THF) have also been prepared. The mono-ring derivatives (Na(OEt{sub 2}){sub 2})((C{sub 5}Me{sub 5})NdCl{sub 3}) and (Me{sub 5}C{sub 5})Nd(N(SiMe{sub 3}){sub 2}){sub 2} are also described.

  7. Optical Spectroscopy and Lifetime Studies of Ytterbium Atoms Trapped in Noble Gas Solids

    NASA Astrophysics Data System (ADS)

    Xu, Chen-Yu; Singh, Jaideep; Zappala, Jake; Bailey, Kevin; Greene, John; Lu, Zheng-Tian; Mueller, Peter; O'Connor, Thomas; Pratt, Stephen; Xu, Hong

    2014-05-01

    As a point defect in a lattice, a neutral ytterbium (Yb) atom isolated in a solid noble gas matrix shares many similarities with the celebrated nitrogen-vacancy center in diamond, including optically accessible transitions, their spontaneous emission, and the inter-system crossing. Our studies are undertaken to determine the feasibility of optically polarizing the nuclear spins of the trapped atoms, which has potential applications in testing fundamental symmetries, studying nuclear moments of exotic isotopes, and perhaps quantum memory and quantum computing. The high resolution optical spectra show line splitting owing to the atomic structure of Yb and the symmetry of multiple trapping sites. The Yb transition 6s21S0 - 6 s6 p3P1 experiences an enhanced spontaneous emission rate due to the index of refraction of the matrices. The decay of Yb's metastable 6 s6 p3P0 in both odd and even isotopes are directly observed for the first time and the vacuum hyperfine quenching rate of the odd isotope is extracted. This work is supported by DOE, Office of Nuclear Physics, under contract DEAC02-06CH11357.

  8. 175km phase-sensitive OTDR with hybrid distributed amplification

    NASA Astrophysics Data System (ADS)

    Wang, Zinan; Zeng, Jiajia; Li, Jin; Peng, Fei; Zhang, Li; Zhou, Yi; Wu, Han; Rao, Yunjiang

    2014-05-01

    A phase-sensitive optical time-domain reflectometry with 175km sensing range is demonstrated using the combination of co-pumping 2nd-order Raman amplification based on random fiber lasing, counter-pumping 1st-order Raman amplification, and counter-pumping Brillouin amplification. With elaborate arrangements, each pumping scheme is responsible for the signal amplification in one particular segment of the all three. To the best of our knowledge, this is the first time that distributed vibration sensing is performed over such a long distance without inserting repeaters. The novel hybrid amplification scheme demonstrated in this work can also be incorporated in other fiber-optic sensing systems for extension of sensing distance.

  9. Thulium(III) and ytterbium(III) in aqueous solution ab initio quantum mechanical charge field molecular dynamics studies

    NASA Astrophysics Data System (ADS)

    Passler, Peter P.; Rode, Bernd M.

    2015-10-01

    Hydration properties of trivalent thulium and ytterbium ions in aqueous solution are investigated via quantum mechanical charge field molecular dynamics (QMCF-MD) simulations. The QMCF-MD formalism is a special type of QM/MM simulation, where the chemically most relevant part of the system - in this case the ion with its first and second hydration shells - is treated by quantum mechanics. The mean ionsbnd O distances and the average coordination numbers of the first hydration shells are compared with experimental EXAFS data. Mean ligand residence times, vibrational frequencies and force constants were evaluated to characterise the dynamics of the systems.

  10. Note: Broadly tunable all-fiber ytterbium laser with 0.05 nm spectral width based on multimode interference filter

    SciTech Connect

    Mukhopadhyay, Pranab K. Gupta, Pradeep K.; Singh, Amarjeet; Sharma, Sunil K.; Bindra, Kushvinder S.; Oak, Shrikant M.

    2014-05-15

    A multimode interference filter with narrow transmission bandwidth and large self-imaging wavelength interval is constructed and implemented in an ytterbium doped fiber laser in all-fiber format for broad wavelength tunability as well as narrow spectral width of the output beam. The peak transmission wavelength of the multimode interference filter was tuned with the help of a standard in-fiber polarization controller. With this simple mechanism more than 30 nm (1038 nm–1070 nm) tuning range is demonstrated. The spectral width of the output beam from the laser was measured to be 0.05 nm.

  11. Spectral diagnostics of a vapor-plasma plume produced during welding titanium with a high-power ytterbium fiber laser

    NASA Astrophysics Data System (ADS)

    Uspenskiy, S. A.; Petrovskiy, V. N.; Bykovskiy, D. P.; Mironov, V. D.; Prokopova, N. M.; Tret'yakov, E. V.

    2015-03-01

    This work is devoted to the research of welding plume during high power ytterbium fiber laser welding of a titanium alloy in the Ar shielding gas environment. High speed video observation of a vapor-plasma plume for visualization of processes occurring at laser welding was carried out. The coefficient of the inverse Bremsstrahlung absorption of laser radiation is calculated for a plasma welding plume by results of spectrometer researches. The conclusion deals with the impact of plasma on a high-power fiber laser radiation.

  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. The [18.1], [18.6] and [18.7] Excited States of Ytterbium Fluoride

    NASA Astrophysics Data System (ADS)

    Steimle, Timothy; Wang, Fang; Smallman, Joe

    2014-06-01

    The generation of a fountain of laser-cooled ytterbium fluoride, YbF, has been recently proposed as a method for long coherent observation times, thereby improving the electron electric dipole moment (eEDM) measurement. Understanding the properties of the excited electronic states of YbF is essential for the development of such a scheme for laser cooling. Here we report on the measurement of the radiative lifetimes,τ, permanent electric dipole moments, μel, and magnetic g-factors for the [18.6] and [18.7] excited states of YbF. The results are compared with the previously determined values for [18.1] state. The [18.1] state is the Ω=1/2 spin-orbit component of the A 2Π(v=0) electronic state arising from the Yb+(4f146pπ)F-(2p14) configuration. The experimentally determined μel, and g-factors will be used to unravel the nature of the [18.6] and [18.7] states, which are known to be admixtures A 2Π and an additional Ω=1/2 state of unknown electronic configuration. Tarbutt, M R; Sauer, B E; Hudson, J J; Hinds E A, New J. Phys 15, 053034, 2013. Zhuang,X; Le,A.;Steimle, T C; Bulleid, N E; Smallman, I J; Hendricks, R J; Skoff, S M ; M R; Hudson, J J; Sauer, B E; Hinds, Tarbutt, M R, PCCP, 13 19103, 2011 Condylis,P C; Hudson, J J; Tarbutt, M R; Sauer, B E; Hinds E A, J. Chem. Phys. 123, 231101, 2005

  14. A reinvestigation of residues 64–68 and 175 in papain. Evidence that residues 64 and 175 are asparagine

    PubMed Central

    Husain, S. S.; Lowe, G.

    1970-01-01

    The tryptophan-containing peptides were isolated from the chymotryptic digest of S-carboxymethylated papain. Residue 175, which is strongly hydrogen-bonded to the active-site histidine residue in the tertiary structure of papain, is asparagine, confirming the work of Kimmel, Rogers & Smith (1965). Its function is probably to maintain the orientation and tautomeric state of the imidazole ring of histidine-159. The amino acid sequence predicted from the electron-density map of papain for residues 64–68 was confirmed, but residue 64 is asparagine, not aspartic acid. This residue, which is about 10 Å from the thiol group of the active-site cysteine-25, cannot therefore be a site of electrostatic attraction for substrates of basic amino acids. PMID:5435495

  15. 26 CFR 1.175-4 - Definition of “land used in farming.”

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 3 2012-04-01 2012-04-01 false Definition of âland used in farming.â 1.175-4... (continued) § 1.175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the business of farming and which meets...

  16. 26 CFR 1.175-4 - Definition of “land used in farming.”

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 3 2014-04-01 2014-04-01 false Definition of âland used in farming.â 1.175-4... (continued) § 1.175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the business of farming and which meets...

  17. 26 CFR 1.175-4 - Definition of “land used in farming.”

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 26 Internal Revenue 3 2011-04-01 2011-04-01 false Definition of âland used in farming.â 1.175-4... (continued) § 1.175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the business of farming and which meets...

  18. 26 CFR 1.175-4 - Definition of “land used in farming.”

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 3 2013-04-01 2013-04-01 false Definition of âland used in farming.â 1.175-4... (continued) § 1.175-4 Definition of “land used in farming.” (a) Requirements. For purposes of section 175, the term land used in farming means land which is used in the business of farming and which meets...

  19. 26 CFR 1.175-3 - Definition of “the business of farming.”

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 3 2014-04-01 2014-04-01 false Definition of âthe business of farming.â 1.175-3... (continued) § 1.175-3 Definition of “the business of farming.” The method described in section 175 is available only to a taxpayer engaged in “the business of farming”. A taxpayer is engaged in the business...

  20. 26 CFR 1.175-3 - Definition of “the business of farming.”

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 26 Internal Revenue 3 2013-04-01 2013-04-01 false Definition of âthe business of farming.â 1.175-3... (continued) § 1.175-3 Definition of “the business of farming.” The method described in section 175 is available only to a taxpayer engaged in “the business of farming”. A taxpayer is engaged in the business...

  1. 26 CFR 1.175-3 - Definition of “the business of farming.”

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 3 2012-04-01 2012-04-01 false Definition of âthe business of farming.â 1.175-3... (continued) § 1.175-3 Definition of “the business of farming.” The method described in section 175 is available only to a taxpayer engaged in “the business of farming”. A taxpayer is engaged in the business...

  2. Influence of ground-state scattering properties on photoassociation spectra near the intercombination line of bosonic ytterbium

    SciTech Connect

    Borkowski, M.; Ciurylo, R.; Tojo, S.; Enomoto, K.; Takahashi, Y.

    2010-10-29

    We study theoretically the properties of photoassociation spectra near the {sup 1}S{sub 0}-{sup 3}P{sub 1} inter-combination line of bosonic ytterbium. We construct a mass scaled model of the excited state interaction potential that well describes bound state energies obtained in a previous photoassociation experiment. We then use it to calculate theoretical photoassociation spectra in a range of ultracold temperatures using semianalytical theory developed by Bohn and Julienne.Photoassociation spectra not only give us the energies of excited bound states, but also provide information about the behavior of the ground state wavefunction. In fact, it can be shown that within the so-called reflection approximation the line intensity is proportional to the ground state wavefunction at the transition's Condon point. We show that in the case of ytterbium, the rotational structure of the photoassociation spectra depends heavily on the behavior of the ground-state wavefunction. The change of the scattering length from one isotope to another and the resulting occurence of shape resonances in higher partial waves determines the appearance and disapperance of rotational components, especially in the deeper lying states, whose respective Condon points lie near the ground state centrifugal barrier. Thus, photoassociation spectra differ qualitatively between isotopes.

  3. Influence of ground-state scattering properties on photoassociation spectra near the intercombination line of bosonic ytterbium

    NASA Astrophysics Data System (ADS)

    Borkowski, M.; Ciury?o, R.; Julienne, P. S.; Tojo, S.; Enomoto, K.; Takahashi, Y.

    2010-10-01

    We study theoretically the properties of photoassociation spectra near the 1S0-3P1 inter-combination line of bosonic ytterbium. We construct a mass scaled model of the excited state interaction potential that well describes bound state energies obtained in a previous photoassociation experiment. We then use it to calculate theoretical photoassociation spectra in a range of ultracold temperatures using semianalytical theory developed by Bohn and Julienne. Photoassociation spectra not only give us the energies of excited bound states, but also provide information about the behavior of the ground state wavefunction. In fact, it can be shown that within the so-called reflection approximation the line intensity is proportional to the ground state wavefunction at the transition's Condon point. We show that in the case of ytterbium, the rotational structure of the photoassociation spectra depends heavily on the behavior of the ground-state wavefunction. The change of the scattering length from one isotope to another and the resulting occurence of shape resonances in higher partial waves determines the appearance and disapperance of rotational components, especially in the deeper lying states, whose respective Condon points lie near the ground state centrifugal barrier. Thus, photoassociation spectra differ qualitatively between isotopes.

  4. Indirect Production of No Carrier Added (NCA) (177)Lu from Irradiation of Enriched (176)Yb: Options for Ytterbium/Lutetium Separation.

    PubMed

    Dash, Ashutosh; Chakravarty, Rubel; Knapp, Furn F Russ; Pillai, Ambikalmajan M R

    2015-01-01

    This article presents a concise review of the production of no-carrier-added (NCA) (177)Lu by the 'indirect' route by irradiating ytterbium-176 ((176)Yb)-enriched targets. The success of this production method depends on the ability to separate the microscopic amounts of NCA (177)Lu from bulk irradiated ytterbium targets. The presence of Yb(+3) from the target in the final processed (177)Lu will adversely affect the quality of (177)Lu by decreasing the specific activity and competing with Lu(+3) complexation since ytterbium will follow the same coordination chemistry. Ytterbium and lutetium are adjacent members of the lanthanide family with very similar chemical properties which makes the separation of one from the other a challenging task. This review provides a summary of the methods developed for the separation and purification of NCA (177)Lu from neutron irradiated (176)Yb-enriched targets, a critical assessment of recent developments and a discussion of the current status of this (177)Lu production method. PMID:25771377

  5. Solid oxide membrane (SOM) process for ytterbium and silicon production from their oxides

    NASA Astrophysics Data System (ADS)

    Jiang, Yihong

    The Solid oxide membrane (SOM) electrolysis is an innovative green technology that produces technologically important metals directly from their respective oxides. A yttria-stabilized zirconia (YSZ) tube, closed at one end is employed to separate the molten salt containing dissolved metal oxides from the anode inside the YSZ tube. When the applied electric potential between the cathode in the molten salt and the anode exceeds the dissociation potential of the desired metal oxides, oxygen ions in the molten salt migrate through the YSZ membrane and are oxidized at the anode while the dissolved metal cations in the flux are reduced to the desired metal at the cathode. Compared with existing metal production processes, the SOM process has many advantages such as one unit operation, less energy consumption, lower capital costs and zero carbon emission. Successful implementation of the SOM electrolysis process would provide a way to mitigate the negative environmental impact of the metal industry. Successful demonstration of producing ytterbium (Yb) and silicon (Si) directly from their respective oxides utilizing the SOM electrolysis process is presented in this dissertation. During the SOM electrolysis process, Yb2O3 was reduced to Yb metal on an inert cathode. The melting point of the supporting electrolyte (LiF-YbF3-Yb2O3) was determined by differential thermal analysis (DTA). Static stability testing confirmed that the YSZ tube was stable with the flux at operating temperature. Yb metal deposit on the cathode was confirmed by scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS). During the SOM electrolysis process for silicon production, a fluoride based flux based on BaF2, MgF2, and YF3 was engineered to serve as the liquid electrolyte for dissolving silicon dioxide. YSZ tube was used to separate the molten salt from an anode current collector in the liquid silver. Liquid tin was chosen as cathode to dissolve the reduced silicon during SOM electrolysis. After electrolysis, upon cooling, silicon crystals precipitated out from the Si-Sn liquid alloy. The presence of high-purity silicon crystals in the liquid tin cathode was confirmed by SEM/EDS. The fluoride based flux was also optimized to improve YSZ membrane stability for long-term use.

  6. 49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 2 2012-10-01 2012-10-01 false Handling requirements for carbon dioxide, solid (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice)...

  7. 49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Handling requirements for carbon dioxide, solid (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice)...

  8. 49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false Handling requirements for carbon dioxide, solid (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice)...

  9. 49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 2 2013-10-01 2013-10-01 false Handling requirements for carbon dioxide, solid (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice)...

  10. 49 CFR 175.900 - Handling requirements for carbon dioxide, solid (dry ice).

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 49 Transportation 2 2014-10-01 2014-10-01 false Handling requirements for carbon dioxide, solid (dry ice). 175.900 Section 175.900 Transportation Other Regulations Relating to Transportation PIPELINE....900 Handling requirements for carbon dioxide, solid (dry ice). Carbon dioxide, solid (dry ice)...

  11. 46 CFR 133.175 - Survival craft and rescue boat equipment.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 46 Shipping 4 2013-10-01 2013-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by...

  12. 46 CFR 133.175 - Survival craft and rescue boat equipment.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 46 Shipping 4 2010-10-01 2010-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by...

  13. 46 CFR 133.175 - Survival craft and rescue boat equipment.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 46 Shipping 4 2011-10-01 2011-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by...

  14. 46 CFR 133.175 - Survival craft and rescue boat equipment.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 46 Shipping 4 2014-10-01 2014-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by...

  15. 46 CFR 133.175 - Survival craft and rescue boat equipment.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 46 Shipping 4 2012-10-01 2012-10-01 false Survival craft and rescue boat equipment. 133.175... LIFESAVING SYSTEMS Requirements for All OSVs § 133.175 Survival craft and rescue boat equipment. (a) All rescue boat equipment must be as follows: (1) The equipment must be secured within the boat by...

  16. 25 CFR 175.62 - Utility actions pending the appeal process.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 25 Indians 1 2010-04-01 2010-04-01 false Utility actions pending the appeal process. 175.62... POWER UTILITIES Appeals § 175.62 Utility actions pending the appeal process. Pending an appeal, utility... discontinuance of service, the utility is not required to resume such service during the appeal process...

  17. 49 CFR 175.25 - Notification at air passenger facilities of hazardous materials restrictions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 49 Transportation 2 2012-10-01 2012-10-01 false Notification at air passenger facilities of hazardous materials restrictions. 175.25 Section 175.25 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION...

  18. 49 CFR 175.25 - Notification at air passenger facilities of hazardous materials restrictions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Notification at air passenger facilities of hazardous materials restrictions. 175.25 Section 175.25 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION...

  19. 33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6 miles per hour. Note: The Corps of Engineers also has regulations dealing with these areas in 33...

  20. 33 CFR 162.175 - Black Rock Canal and Lock at Buffalo, New York.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... Buffalo, New York. 162.175 Section 162.175 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF... Black Rock Canal and Lock at Buffalo, New York. In the Black Rock Canal and Lock, no vessel may exceed 6 miles per hour. Note: The Corps of Engineers also has regulations dealing with these areas in 33...

  1. 20 CFR 702.175 - Effect of work on excluded vessels; reinstatement of certification.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Effect of work on excluded vessels; reinstatement of certification. 702.175 Section 702.175 Employees' Benefits EMPLOYMENT STANDARDS ADMINISTRATION, DEPARTMENT OF LABOR LONGSHOREMEN'S AND HARBOR WORKERS' COMPENSATION ACT AND RELATED STATUTES ADMINISTRATION AND PROCEDURE General...

  2. 26 CFR 1.175-1 - Soil and water conservation expenditures; in general.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 26 Internal Revenue 3 2014-04-01 2014-04-01 false Soil and water conservation expenditures; in... Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction...

  3. 26 CFR 1.175-1 - Soil and water conservation expenditures; in general.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 26 Internal Revenue 3 2012-04-01 2012-04-01 false Soil and water conservation expenditures; in... Corporations (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction...

  4. 36 CFR 1192.175 - High-speed rail cars, monorails and systems.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... C of 49 CFR part 37, shall be designed for high-platform, level boarding and shall comply with..., monorails and systems. 1192.175 Section 1192.175 Parks, Forests, and Public Property ARCHITECTURAL AND...), and 1192.127 (if applicable). The design of cars shall be coordinated with the boarding...

  5. 36 CFR 1192.175 - High-speed rail cars, monorails and systems.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... C of 49 CFR part 37, shall be designed for high-platform, level boarding and shall comply with..., monorails and systems. 1192.175 Section 1192.175 Parks, Forests, and Public Property ARCHITECTURAL AND...), and 1192.127 (if applicable). The design of cars shall be coordinated with the boarding...

  6. 36 CFR 1192.175 - High-speed rail cars, monorails and systems.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... C of 49 CFR part 37, shall be designed for high-platform, level boarding and shall comply with..., monorails and systems. 1192.175 Section 1192.175 Parks, Forests, and Public Property ARCHITECTURAL AND...), and 1192.127 (if applicable). The design of cars shall be coordinated with the boarding...

  7. 36 CFR 1192.175 - High-speed rail cars, monorails and systems.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... C of 49 CFR part 37, shall be designed for high-platform, level boarding and shall comply with..., monorails and systems. 1192.175 Section 1192.175 Parks, Forests, and Public Property ARCHITECTURAL AND...), and 1192.127 (if applicable). The design of cars shall be coordinated with the boarding...

  8. 36 CFR 1192.175 - High-speed rail cars, monorails and systems.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... C of 49 CFR part 37, shall be designed for high-platform, level boarding and shall comply with..., monorails and systems. 1192.175 Section 1192.175 Parks, Forests, and Public Property ARCHITECTURAL AND...), and 1192.127 (if applicable). The design of cars shall be coordinated with the boarding...

  9. 5 CFR 175.102 - Requests for the declassification of documents.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... documents. 175.102 Section 175.102 Administrative Personnel OFFICE OF PERSONNEL MANAGEMENT CIVIL SERVICE... mandatory review of any classified document, held by the Office of Personnel Management, which was classified for national security purposes by the Civil Service Commission. The Office of Personnel...

  10. 1 CFR 17.5 - Criteria for emergency filing for public inspection.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 1 General Provisions 1 2011-01-01 2011-01-01 false Criteria for emergency filing for public inspection. 17.5 Section 17.5 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER PREPARATION... for public inspection is considered a special arrangement under § 17.2 of this part that results...

  11. 1 CFR 17.5 - Criteria for emergency filing for public inspection.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 1 General Provisions 1 2010-01-01 2010-01-01 false Criteria for emergency filing for public inspection. 17.5 Section 17.5 General Provisions ADMINISTRATIVE COMMITTEE OF THE FEDERAL REGISTER PREPARATION... for public inspection is considered a special arrangement under § 17.2 of this part that results...

  12. 49 CFR 175.701 - Separation distance requirements for packages containing Class 7 (radioactive) materials in...

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... containing Class 7 (radioactive) materials in passenger-carrying aircraft. 175.701 Section 175.701... packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) The following table... Class 7 (radioactive) materials labeled RADIOACTIVE YELLOW-II or RADIOACTIVE YELLOW-III and...

  13. 49 CFR 175.701 - Separation distance requirements for packages containing Class 7 (radioactive) materials in...

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... containing Class 7 (radioactive) materials in passenger-carrying aircraft. 175.701 Section 175.701... packages containing Class 7 (radioactive) materials in passenger-carrying aircraft. (a) The following table... Class 7 (radioactive) materials labeled RADIOACTIVE YELLOW-II or RADIOACTIVE YELLOW-III and...

  14. 49 CFR 40.175 - What steps does the first laboratory take with a split specimen?

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 1 2011-10-01 2011-10-01 false What steps does the first laboratory take with a split specimen? 40.175 Section 40.175 Transportation Office of the Secretary of Transportation... steps does the first laboratory take with a split specimen? (a) As the laboratory at which the...

  15. 49 CFR 40.175 - What steps does the first laboratory take with a split specimen?

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 49 Transportation 1 2013-10-01 2013-10-01 false What steps does the first laboratory take with a split specimen? 40.175 Section 40.175 Transportation Office of the Secretary of Transportation... steps does the first laboratory take with a split specimen? (a) As the laboratory at which the...

  16. 49 CFR 175.310 - Transportation of flammable liquid fuel; aircraft only means of transportation.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 49 Transportation 2 2011-10-01 2011-10-01 false Transportation of flammable liquid fuel; aircraft only means of transportation. 175.310 Section 175.310 Transportation Other Regulations Relating to Transportation PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION HAZARDOUS MATERIALS REGULATIONS CARRIAGE...

  17. 26 CFR 1.175-1 - Soil and water conservation expenditures; in general.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 26 Internal Revenue 3 2010-04-01 2010-04-01 false Soil and water conservation expenditures; in... (continued) § 1.175-1 Soil and water conservation expenditures; in general. Under section 175, a farmer may deduct his soil or water conservation expenditures which do not give rise to a deduction for...

  18. 21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 3 2012-04-01 2012-04-01 false Partial phosphoric acid esters of polyester resins. 175.260 Section 175.260 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES...

  19. 21 CFR 175.350 - Vinyl acetate/crotonic acid copolymer.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Vinyl acetate/crotonic acid copolymer. 175.350 Section 175.350 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES AND COMPONENTS...

  20. 21 CFR 175.260 - Partial phosphoric acid esters of polyester resins.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 3 2013-04-01 2013-04-01 false Partial phosphoric acid esters of polyester resins. 175.260 Section 175.260 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) FOOD FOR HUMAN CONSUMPTION (CONTINUED) INDIRECT FOOD ADDITIVES: ADHESIVES...