Semi-empirical analysis of oscillator strengths for Nb II

Ruczkowski, J.; Bouazza, S.; Elantkowska, M.; Dembczyński, J.

doi:10.1016/j.jqsrt.2014.12.014

Cited by 22 publications

(9 citation statements)

References 17 publications

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“…(5). As in previous works devoted to oscillator strength determination (see for instance [27]), the angular coefficients of the transition matrix, obtained in pure SL coupling with the help of Racah algebra is transformed into the actual intermediate coupling pertaining to our level eigenvector amplitudes, Moreover the transition integrals…”

Section: Oscillator Strength Determinationmentioning

confidence: 99%

Second spectrum of Chromium (Cr II), Part II: Radiative lifetimes and oscillator strengths of transitions depopulating low lying 3d44p levels

Bouazza

Quinet

Palmeri

2018

Atomic Data and Nuclear Data Tables

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Radiative lifetime and oscillator strength values were computed by means of a pseudo-relativistic Hartree-Fock model including core-polarization and compared successfully with experimental data given in the literature for respectively numerous low-lying Cr II 3d 4 4p levels, up to 54784 cm −1 , and transitions depopulating these levels. Then transition probability and branching fraction data were also deduced in the wavelength range 1825-94400 Å. Furthermore the extracted radial integral values, obtained with the help of the oscillator strength parameterization method, are given for involved transitions in this work, i.e. 3d 4 4s-3d 4 4p, 3d 5-3d 4 4p and 3d 4 4p-3d 4 4d. We confirm our observed previous general trends, noting once again a decreasing of transition radial integral values with filling nd shells of the same principal quantum numbers for nd k (n + 1)s → nd k (n + 1)p transitions.

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Section: Oscillator Strength Determinationmentioning

confidence: 99%

Second spectrum of Chromium (Cr II), Part II: Radiative lifetimes and oscillator strengths of transitions depopulating low lying 3d44p levels

Bouazza

Quinet

Palmeri

2018

Atomic Data and Nuclear Data Tables

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“…Finally our investigation of singly ionized hafnium was extended by comparing our calculated oscillator strengths with available experimental data and by predicting new values for a rather large number of transitions. We hope that this work, in the image of our previous studies [16][17][18][19][20][21][22][23][24], will constitute a good stimulus and a useful guide for experimenters to perform further spectroscopic measurements in this ion.…”

Section: Resultsmentioning

confidence: 86%

Semi-empirical studies of atomic transition probabilities, oscillator strengths and radiative lifetimes in Hf II

Bouazza

Quinet

Palmeri

2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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a b s t r a c tOver the past few years, laser induced fluorescence and Fourier Transform techniques have been applied to measure radiative lifetimes and branching fractions in Hf II in order to derive oscillator strengths and transition probabilities. In the present work, we propose to compare for the first time these experimental data to computed values obtained by two different semi-empirical approaches, respectively based on a parametrization of the oscillator strengths and on a pseudo-relativistic Hartree-Fock model including corepolarization effects. The overall agreement between all sets of data is found to be good. We furthermore give radial integrals of the main atomic transitions in this study: 〈5d6s6p| r 1 |5d 2 6s〉¼ 0.1504 (0.0064), 〈6s 2 6p|r 1 |5d6s 2 〉¼ 1.299 (0.012), 〈5d 2 6p|r 1 |5d 2 6s〉¼ À0.298 (0.013), 〈5d 2 6p|r 1 |5d 3 〉¼ 2.025 (0.027). Finally a new set of oscillator strengths and transition probabilities is reported for many transitions in Hf II.

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“…This allows us to obtain the angular part of the matrix element. As in previous works [23][24][25], we initially selected the strongest lines, preferably not blended, particularly those representing transitions between levels with a limited number of significant components (the third largest one must represent less than 0.3% of the total) and whose experimental gf values are given with the smallest uncertainties. Sometimes it is more efficient to pick levels with the biggest angular momentum since not all concerned configuration levels have such momentum, therefore the effect of configuration mixing is negligible.…”

Section: Gf Derivationsmentioning

confidence: 99%