... Title : DETERMINATION AND APPLICATION OF ABSOLUTE TRANSITION PROBABILITIES AND LIFETIMES OF ATOMS, MOLECULES, AND IONS ...
DTIC Science & Technology
New absolute atomic transition probability measurements are reported for 12 transitions in Cr II and
NASA Technical Reports Server (NTRS)
Absolute transition probabilities are given for the bands of the Herzberg I, Chamberlain, Herzberg II and Herzberg III systems of molecular oxygen. Nightglow, Oxygen, Transition probabilities. (mjm)
National Technical Information Service (NTIS)
Absolute atomic transition probabilities for emission lines from 70 levels in Sc i and Sc ii are reported. The transition probabilities are from emission branching ratios measured using the 1.0-m Fourier-transform spectrometer at the National Solar Observatory. Radiative lifetimes, measured ...
Energy Citations Database
New absolute atomic transition probability measurements are reported for 12 transitions in Cr II and two transitions in Zn II. These transition probabilities are determined by combining branching ratios measured by classical techniques and radiative ...
NASA Astrophysics Data System (ADS)
Absolute radiative transition probabilities are reported for 559 strong lines of neutral cerium covering the wavelength range 340-880 nm. These transition probabilities are obtained by scaling published relative line intensities (Meggers et al 1975 Tables of Spectral Line Intensities (National ...
A review is given of some of the most recent investigations of absolute electromagnetic transition probabilities in deformed odd nuclei (150
A simple and fast method for the measurements of transiton probabilities for lines obtained from pulsed sources is presented. Measuring the linewidth and peak intensities transformed in an internal absolute scale, relative transition probabilities are obtained from a simple relation. The method is useful only for ...
... Title : Characteristic Functional of a Probability Measure Absolutely Continuous with Respect to a Gaussian Radon Measure. ...
The radiative lifetimes of 39 levels in V I have been measured by the method of laser-induced fluorescence from sputtered metal vapor. Emission branching ratios have been measured for these levels to determine absolute transition probabilities for 208 lines in the wavelength range 3180 � to 16,400 �. These ...
The model provides a correct description of the main features of the ..gamma.. decay of analogs. It predicts the correct ratio of the analog-antianalog transition probabilities for different nuclei and different analogs, and the energy of the core polarization type states is in good agreement with the experimental position of the maximum of the strength ...
... dynamics, OH, Transition probabilities, Rotational ... PROBABILITY, ACCURACY, ENERGY TRANSFER, TRANSITIONS, GROUND ...
singularity (and an antigravity sector beyond it) by a potential barrier of in#12;nite height and width is switched o#11;. This sector is shielded from the (probably unphysical) antigravity sector of the theory to transitions of the system into the antigravity sector. Apart from this sector of absolute stability
E-print Network
Absolute transition probabilities and oscillator strengths are estimated for the electronic bands of CS(+) systems. Franck-Condon factors, r-centroids, band origins, transition probabilities, band oscillator strengths, and positions of electronic bandheads observed in the laboratory and ...
We operated a high-current wall-stabilized arc to generate a low-temperature, steady-state plasma in nitrogen, with admixtures of argon, helium, and oxygen. We measured the relative atomic transition probabilities for several strong and weak 3s-3p and 3p-3d lines of neutral nitrogen and placed them on an absolute scale with ...
... of probability method of calculation, energy levels and probability of transition between them ... calculation of number of optical transitions. ...
... OF MEASURING TRANSITION PROBABILITIES. ... Descriptors : (*ELECTRON TRANSITIONS, PROBABILITY ... ATOMIC ENERGY LEVELS, SODIUM ...
Lifetimes have been measured using time-resolved laser-induced fluorescence for 16 odd levels in the doublet, quartet and sextet systems of Mo II, with energies in the range 48 000-61 000 cm?1. Absolute transition probabilities and oscillator strengths are determined for 110 UV and visible transitions (208 < ? ...
Absolute frequency measurement and spectroscopy of gas laser transitions in far IR, analyzing Zeeman
The energies of the three gamma lines in Hg/sup 199/ were measured absolutely, using an iron-free double-focusing spectrometer. The atomic binding energy was also absolutely determined. Relative L-subshell conversion intensities were found to yield accurate information on the multipolarity. Relative M-shell conversion coefficients were ...
The relative intensities of 27 optical transitions in the Eu II spectrum are measured, and the excited state lifetimes absolute oscillator strengths are computed. A grating monochromator is used to observe selectively the emitted lines in the wavelength region from 350-750 nm, and a tungsten ribbon lamp is used for the calibration of the spectral ...
... Transition moments and their associated transition probabilities, line ... The lower and upper energy levels of the transitions tabulated herein ...
By means of the alpha-decay theory and the theory of multipolar transitions the absolute or standardized transition probabilities for gamma emission of several excited states of Po/sup 214/ were calculated, and the spin and parity were determined. From this a decay scheme was proposed, and a
The behavior of the spectral intensities of helium lines, including forbidden lines, was studied in a constant electric field. The absolute values of the probabilities of forbidden transitions and their dependence on the field voltage were determined from measurements of the relative strengths of forbidden and allowed spectral ...
This paper extends our previous work on obtaining reaction coordinates from aimless shooting and likelihood maximization. We introduce a simplified version of aimless shooting and a half-trajectory likelihood score based on the committor probability. Additionally, we analyze and compare the absolute log-likelihood score for perfect and approximate reaction ...
... The formulas for the transition probabilities and for the transition intensities are ... are presented for the intensity of the forbidden transitions in lithium ...
The reduced electric quadrupole transition probabilities and excitation energies of the accessible low lying states in Eu/sup 151/, Eu/sup 153/, Tb/sup 159/, HO/sup 165/, Er/sup 167/, ured by Coulomb excitation with protons or deuterons having an initial energy of about 4.5 Mev. The measurements were performed on the groups of inelastically ...
Absolute transition probabilities for lines of Cr II, Na II and Sb I were determined by emission spectroscopy of laser induced plasmas. The plasma was produced focusing the emission of a pulsed Nd-Yag laser on solid samples containing the atom in study. T...
Fourier transform spectra are used to determine emission branching fractions for 1290 lines of the first spectrum of gadolinium (Gd i). These branching fractions are converted to absolute atomic transition probabilities using previously reported radiative lifetimes from time-resolved laser-induced-fluorescence measurements (Den Hartog ...
If the energy difference between excited and ground states is greater than 2 mc/sup 2/ (m is the electron mass), then a nucleus in the excited state Way decay by emission of an electron-positron pair together with a photon. This process is called the internal Compton effect in pair conversion. Formulas are given for the relative differential probability of this ...
... indication of how transition probabilities might ... PROBABILITY, HYDROGEN, TRANSITIONS, BACKGROUND RADIATION, MASS ...
... METHODS OF DETERMINING TRANSITION PROBABILITIES AND LEVEL POPULATION DENSITIES BY SELF-ABSORPTION OF RADIATION,. ...
... Title : COLLISIONAL TRANSITION PROBABILITIES FOR VIBRATIONAL DEACTIVATION OF CHEMICALLY ACTIVATED SEC-BUTYL RADICALS. ...
... in that there are no absolute boundaries between these there radiations and furthermore, Cerenkov radiation merges into transition radiation for a ...
... Allowed and forbidden transitions are listed separately. For each line the transition probability for ... the statistical weights, and the energy levels of the ...
... SIGNIFICANCE OF ENERGY LEVEL TRANSITIONS IN NERVE ... probability of transition of ... Descriptors : *ELECTRON TRANSITIONS, *MOLECULAR ...
Astrophysical implications of a new scale of accurate oscillator strengths obtained for Eu II are discussed. A new value of the solar photospheric abundance of Europium is derived: A(Eu) equals 0.51 plus or minus 0.08, in the usual logarithmic scale. Some stellar implications of the new gf-values are also presented.
The decay of the ensuremath I^{?}=K^{?}=8- isomeric state at 2340keV in 132Ce has been investigated in the 120Sn(16O, 4n)132Ce reaction. The measurements were carried out in e - ? and ? - ? coincidence modes using an electron spectrometer coupled to the OSIRIS II gamma-ray array at the Heavy Ion Laboratory of the University of Warsaw. Experimentally obtained internal conversion coefficients for ...
Absolute cross sections are reported for single, double, and triple charge exchange of Feq+ (q=5-13) ions with CO and CO2. The highly charged Fe ions are generated in an electron cyclotron resonance ion source. Absolute data are derived from knowledge of the target gas pressure, target path length, and incident and charge-exchanged ion currents. ...
We have been studying the KX and gamma rays spectra in the electron capture decay of {sup 139}Ce{yields}{sup 139}La, which were measured by Ge-spectrometer. The absolute intensity of KX and the 165.8 keV gamma rays has been determined and the known conversion coefficients of the 165.8 keV gamma transition of {sup 139}La were used. The ...
We have been studying the KX and gamma rays spectra in the electron capture decay of 139Ce-->139La, which were measured by Ge-spectrometer. The absolute intensity of KX and the 165.8 keV gamma rays has been determined and the known conversion coefficients of the 165.8 keV gamma transition of 139La were used. The probability PK was ...
A few remarks are first made on invariant probability measures of a transition probability operator. The notion of irreducibility is introduced for a transition operator acting on the continuous functions on a compact space and implications of this assump...
Jan 1, 1971 ... Title: Atomic transition probabilities of the halogens ... Abstract: Halogens atomic transition probabilities spectroscopic measurements in ...
NASA Website
... Accession Number : ADA083457. Title : Absolute Frequency Measurements of N2O Laser Transitions,. Corporate Author ...
... For each ion the transitions are arranged ... to multiplets, supermultiplets, transition arrays, and ... Allowed and forbidden transitions are listed separately ...
... Abstract : Transition probabilities were calculated for forbidden transitions within the 2s22p and 2s2p2 configurations and for permitted transitions in ...
... Accession Number : ADD095222. Title : Wavelengths and Transition Probabilities for Atoms and Atomic Ions. Part I. Wavelengths. Part II. ...
... probability parameters of the nitric oxide systems were ... Descriptors : *ELECTRON TRANSITIONS), (*NITROGEN OXIDES, (*INFRARED SPECTRA ...
... Accession Number : AD0700979. Title : TRANSITION PROBABILITIES OF ARGON II. Descriptive Note : Final rept. 1967-1969,. ...
... Accession Number : AD0656790. Title : RATIOS OF E2 TRANSITION PROBABILITIES OF DEFORMED EVEN-EVEN NUCLEI,. ...
Fixed point probability vector of ergodic /cyclic/ transition matrices by matrix inversion technique
... Title : ENERGY LEVELS AND TRANSITION PROBABILITIES OF IRON DOPED SAPPHIRE. Descriptive Note : Engineering research rept.,. ...
... Accession Number : AD0664799. Title : E2 TRANSITION PROBABILITIES IN THE DAVYDOV MODEL,. Corporate Author ...
... Title : Atomic Transition Probabilities for Vanadium, Chromium, and Manganese (A Critical Data Compilation of Allowed Lines),. ...
... THESIS AN ANALYSIS OF YOUTH LABOR FORCE TRANSITION PROBABILITIES ... AN ANALYSIS OF YOUTH LABOR FORCE December, 1984 ...
... Title : THEORETICAL DETERMINATION OF THE PROBABILITY OF AN ELECTRIC QUADRUPOLE TRANSITION (K VOPROSU O ...
... PROBABILITIES AND ABSORPTION OSCILLATOR STRENGTHS FOR THE ALKALI-LIKE IONS OF THE ALKALINE EARTHS AND FOR CALCIUM I. ...
Picosecond lifetimes in 46V and 46Ti were determined using the recoil distance Doppler-shift technique with a plunger device coupled to a setup of five HP Ge detectors enhanced by one EUROBALL CLUSTER detector. The experiment was carried out using the 32S(16O,pn) reaction at 38 MeV at the Cologne FN TANDEM facility. The differential decay curve method in coincidence mode was employed to derive ...
Radiative lifetimes, accurate to �5%, have been measured for 153 levels of neutral cerium using time-resolved laser-induced fluorescence (TRLIF) on a slow beam of cerium atoms. Of the 153 levels studied, 150 are even parity and 3 are odd parity. The levels range in energy from 16 869 to 28 557 cm?1. This set of Ce I lifetimes is much more extensive than others published to date, and will provide ...
Strengths and Stark-effect widths of the Sn I and Sn II lines prominent between 3200 and 7900 A are measured with a spectroscopic shock tube. Absolute strengths of 17 ionic lines are obtained with estimated (22-50)% accuracy and conform to appropriate quantum-mechanical sum rules. Relative transition probabilities for nine prominent ...
(234)Th is a naturally occurring radionuclide being the daughter of (238)U. This paper presents the results obtained in a new evaluation of the nuclear data characterizing the (234)Th radioactive decay. The following decay characteristics have been evaluated: half-life, energies and probabilities of beta and gamma-ray transitions, internal conversion ...
PubMed
High-spin states of the stable 157Gd nucleus were studied by a /?-/? coincidence measurement using multiple Coulomb excitation with a 136Xe beam. Two rotational bands of the opposite parity coexisting along the yrast line were extended up to 29/2- and 29/2+, respectively, one of which was of a ?h9/2 configuration and the other was of a ?i13/2 configuration. Fifteen /E1 ...
... moments and transition probabilities ... ENERGY, ELECTROMAGNETIC RADIATION, STRENGTH ... GENERAL), PHOTONS, TRANSITIONS, KINETICS ...
Paired correlations of nucleons of the superconducting type play an important role in nuclear BETA and gamma transitions, and should also be important in alpha decay. A theory of alpha decay was formulated within the framework of a superfluid model of the nucleus, and the effect of paired correlations of the superconducting type on the ...
Current status of advanced theoretical methods for transition probabilities for atoms and ions is discussed. An experiment on the f values of the resonance transitions of the Kr and Xe isoelectronic sequences is suggested as a test for the theoretical methods.
... Transition probabilities for both v ... NITROGEN, *ELECTRON TRANSITIONS, IONS, CHEMICAL ... TIME, MOLECULAR ENERGY LEVELS, POTENTIAL ...
Reduced transition probabilities of B(M1) and B(E2) are determined up to spin (23/2 on the basis of a Coulomb excitation experiment. Strong signature-dependent staggering was observed for ..delta..I = 1 M1 transition probabilities. In contrast, there was no significant signature dependence observed for ..delta..I = ...
Targets of samarium, terbium, and cadmium were bombarded with protons, and in one case with deuterons, of up to 7.0 Mev and the inelastically scattered particles were observed. In the rare earths, samarium and terbium, four previously known levels were studied: the 58- and 139-kev levels in Tb159, the 80-kev level in Sm154, and the 123-kev level in Sm152. The excitation process was determined to ...
This is the second of four papers in which a method of determining the curves of growth in absorption has been used along with vapor-pressure data to determine the absolute transition rates of resonance lines. Measurements of the curves of growth of Cu la...
Ever since the classic work of Wannier in 1953, the process of treating two threshold electrons in the continuum of a positively charged ion has been an active field of study. The authors have developed a treatment motivated by the physics below the double ionization threshold. By modeling the double ionization as a series of Landau-Zener transitions, they obtain an analytical ...
The development of novel techniques is critical for maintaining a state-of-the-art core competency in atomic physics and readiness for evolving programmatic needs. We have carried out a three-year effort to develop novel spectroscopic instrumentation that added new dimensions to our capabilities for measuring energy levels, radiative transition ...
DOE Information Bridge
The technique of photoelectron spectroscopy was used to obtain the relative continuum transition probabilities of atomic oxygen at 584 A for transitions from 3P ground state into the 4S, D2, and P2 states of the ion. Transition probability ratios for the ...
Radiative lifetimes measured by time-resolved laser-induced fluorescence are reported for 40 odd-parity levels and 36 even-parity levels of singly ionized terbium. The odd-parity levels range in energy from 29000 to 40000 cm{minus}1 and those of even-parity from 21000 to 37000 cm{minus}1. These lifetimes, with one exception, are accurate to {+-}5%. They will provide an ...
The operating experience of SNAP devices in the Transit 4A and 4B satellites is described. Only two power excursions were observed which are probably due to a capacitor failure in the power conditioning system. The results and tests indicate that the reliability of the generator unit and thermoelectric couples will be satisfactory. Exhaustive ...
Absolute electromagnetic transition probabilities in Po196 have been measured using the recoil distance Doppler-shift technique. The lifetimes of the three lowest yrast states in Po196 were extracted from singles ?-ray spectra by using the recoil-decay tagging method. In addition, configuration mixing calculations of angular momentum ...
Coulomb excitation of several nuclei in the region between A = l23 and 137 has resulted in observation of the following gamma rays: Sb/sup 123/, 161 and 376 kev; Cs/sup 133/, 82, Ba/sup 135/, 218 kev; and Ba/sup 137/, 281 kev. Values of reduced transition probability for excitation are given for most of the above gamma rays. In the case of Cs/sup ...
Reduced transition probabilities B(E2) for spherical doubly even nuclei are calculated in the quasiboson approximation (QBA), the random-phase approximation (RPA) and the improved random-phase approximation (IRPA). A comparison is made with experiments for each approximation, and the effect of the Pauli principle is demonstrated. The effect of these ...
A review is presented of recent experimental investigations dealing with the ionization of various atoms and molecules in collisions with metastable rare gas atoms. These investigations include absolute cross section msasurements, mass spectrometric analysis of the ions formed, and electron spectroscopic analysis of the electrons ejected. The results are discussed in ...
The most general continuous time dependent evolution of a physical system is represented by a continuous oneparameter semi-group of linear mappings of density operators to density operators. It is shown that if these dynamical mappings form a group they can be represented by a group of unitary operators on the Hilbert space of state vectors. This proof does not assume that the ...
The rates of the various elementary reactions of the type H + H/sub 2/ yields H/sub 2/ + H, involving ortho-para conversions or isotope exchanges, have been calculated by the absolute reaction rate theory, using new fundamental energy surface, but estimating the activation energy to fit experimental results. The transition compled in these ...
Relative intensity measurements of various line pairs resulting from magnetic dipole transitions within the configurations s/sup 2/p/sup 2/ and s/sup 2/p/sup 4/, in conjunction with calculated transition probabilities, have been used to determine the wavelength dependence of the sensitivity of a grazing incidence spectrometer, in the ...
these probabilities are not with respect to absolute truth, but with respect. t o agreement of the two algorithms. Thus, as with any experimentally based ...
Improved measurements of the radiative lifetimes of NO A 2?+(v'=0,1,2) are presented and used to update the absolute electronic transition moment for the NO ? bands. The pressure-dependent fluorescence decay rate was measured in a low-pressure, room-temperature, flow cell containing dilute mixtures of NO in N2 using time-resolved laser-induced fluorescence ...
The even {sup 52-56}Ti isotopes have been studied with intermediate-energy Coulomb excitation and absolute B(E2;0{sup +}{yields}2{sub 1}{sup +}) transition rates have been obtained. These data confirm the presence of a subshell closure at neutron number N=32 in neutron-rich nuclei above the doubly magic nucleus {sup 48}Ca and provide no direct evidence for ...
Two approaches used in the description of the channeling radiation emitted from relativistic positrons are compared with each other. In the first (traditional) case, the probability of the process is proportional to a sum of absolute squares of the amplitudes of the transition between two states with definite transverse energy levels ...
The mass transit industry will be affected by the transition to the metric system and must plan for it. The potential effects of metric conversion on the transit industry are discussed based on an assessment of the most probable course of action to be fol...
S>Certain level properties of odd deformed nuclei were previously descrived within the fram work of BohrMattelson Nilsson models; however, the intensity rules do not agree fo Hf/sup 117/ where the El probability ratio of 208 and 321 kev differ from the theoretical value. An attempt is made to find the absolute magnitudes of ...
Charge exchange (CE) plays a fundamental role in the collisions of solar- and stellar-wind ions with lunar and planetary exospheres, comets, and circumstellar clouds. Reported herein are absolute cross sections for single, double, triple, and quadruple CE of Fe q + (q = 5-13) ions with H2O at a collision energy of 7q keV. One measured value of the pentuple CE is also given for ...
Calculations are performed for the probabilities of singlet and triplet transitions of a helium atom in a strong constant electric field. The probability of the forbidden transitions is found to depend strongly on the intensity of the electric field. The calculated values are compared with the experimental data.
Statistical theory of interior-exterior transition and collision probabilities for minor bodies to exhibit a complicated array of behaviors such as transition between the interior and exterior Hill). Using the structures around libration points, a statistical theory of the probability of interior
The usual dipole approximation for the transition probabilities for hydrogen atoms is derived from the exact transition probabilities by considering j = 1 photons only, neglecting retardation, and using an identity derived from the wave equation for the r...
A method for determination of absolute intensities of gamma-transitions in neutron resonances is developed. It is based on comparing two time-of-flight spectra measured simultaneously: spectrum of capture in the isotope under study and spectrum of neutron...
A technique for measuring the curve of growth of an atomic spectral line is described, and application of the method to the determination of the absolute transition rates of Cd 3261 and Zn 3076 is made. The estimated accuracies are 10-15 per cent. This is...
... Probabilities. Volume II. Sodium through Calcium,. Corporate Author : NATIONAL STANDARD REFERENCE DATA SYSTEM. ...
Observations with the Ultraviolet Spectrometer and Polarimeter instrument on the SMM spacecraft were
... have devised for measuring the absolute H density involves absorption spectroscopy on the Lyman-alpha transition of ...
... AD0464661. Title : SCF EXCITED STATES AND TRANSITION PROBABILITIES OF SOME NEON-LIKE AND ARGON-LIKE IONS. ...
Ratios of E2 transition probabilities for the deexcitation of levels belonging to the ground state-, beta-, and gamma-rotational bands in the deformed region 150
The transition probability is calculated for excitation of double-exciton states in absorption and emission processes in molecular crystals. It is found that: (1) A major contribution to the transition probability for cooperative excitation to electronic ...
