Semiempirical hyperfine structure and ab initio isotope shift predictions in Zr II

Bouazza, S.

doi:10.1002/qua.22614

Cited by 7 publications

(19 citation statements)

References 40 publications

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“…As only a few lowest energy configuration even-parity levels were available from experimental data, in our previous works regarding the fs of transition metal elements much of our analyses of model spaces were restricted to (3d + 4s) 4 , (4d + 5s) 4 and (5d + 6s) 4 . Fortunately, the energy levels of the five lowest configurations for V II are determined experimentally [1] [3].…”

Section: Accurate Fine and Hyperfine Structure Analysismentioning

confidence: 99%

“…Fortunately, the energy levels of the five lowest configurations for V II are determined experimentally [1] [3]. We also know that there is poor isolation of the configurations (3d + 4s) 4 from other configurations in the 3d-elements since some of their levels are located above the levels belonging to other even-parity configurations whose centers of gravity positions are higher.…”

Section: Accurate Fine and Hyperfine Structure Analysismentioning

confidence: 99%

“…Therefore, we use a configuration basis set, called the extended model space, which consists of the following six configurations: (3d + 4s) 4 + 3d 3 5s + 3d 3 4d + 3d 3 5d. The interactions between particular states are determined quantitatively by this analysis.…”

Section: Accurate Fine and Hyperfine Structure Analysismentioning

confidence: 99%

“…Up to now, no parametric analysis of hfs exists for any even or odd configurations of V II. We propose to fill this absence, as we did previously for many singly ionized atoms: Hf II, Zr II, Ta II, Ti II and Nb II [4]- [8] in an aim to complete previous works and to eliminate erroneous level assignments. The background and motivation of this work should present high interest for astrophysical investigations, very useful in the study of the history of nucleosynthesis, chemically peculiar stars and the sun.…”

Section: Introductionmentioning

confidence: 98%

“…According to their classification, all except two of the terms were known in the configurations 3d 3 4s and 3d 4 , but 3d 2 4s 2 was altogether unknown. Later, Sugar and Corliss compiled the energy levels of vanadium in its 23 stages of ionization, which were analysed from atomic spectra [2].…”

Section: Introductionmentioning

confidence: 99%

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Fine Structure Analysis of the Configuration System of V II. Part I: Even-Parity Levels

Bouazza¹,

Holt²,

Rosner³

et al. 2014

JMP

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Using a linked-parameter technique of level-fitting calculations in a multi configuration basis, a parametric analysis of fine structure (fs) for even-parity levels of V II, involving six configurations, has been performed. This led us to exchange the assignments of two triplets, 3d 3 ( 2 F)4s c 3 F and 3d 4 d 3 F, reported in earlier analyses as being located at 30,300 cm −1 and 30,600 cm −1 , respectively. This is confirmed by experimental hyperfine structure (hfs) A constants, used as fingerprints. Moreover, the current singlet 3d 2 4s 2 1 D2 position is likely too high. The fs parameters, magnetic Landé g-factors, and the percentage of leading eigenvectors of levels are calculated. We present also predicted singlet, triplet and quintet positions for missing experimental levels up to 100,000 cm −1 . The single-electron hfs parameters are determined in their entirety for 51 V II for the model space (3d + 4s) 4 with good accuracy. For the model space (3d + 4s) 4 of 51 V II the single-electron hfs parameters are computed; furthermore, our achieved theoretical evaluations of the single-electron hfs parameters, thanks to the use of ab initio calculations, reinforce the validity of these hfs parameter values, deduced from experimental data.

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Section: Accurate Fine and Hyperfine Structure Analysismentioning

confidence: 99%

Section: Accurate Fine and Hyperfine Structure Analysismentioning

confidence: 99%

Section: Accurate Fine and Hyperfine Structure Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Fine Structure Analysis of the Configuration System of V II. Part I: Even-Parity Levels

Bouazza¹,

Holt²,

Rosner³

et al. 2014

JMP

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A comparative study between semi-empirical oscillator strength parametrization and relativistic Hartree–Fock methods for computing the radiative parameters in Zr II spectrum

Quinet

Bouazza

Palmeri

2015

Journal of Quantitative Spectroscopy and Radiative Transfer

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a b s t r a c tIn the present work, we compare the radiative transition rates computed by two different semi-empirical approaches, based on a parametrization of the oscillator strengths and on a pseudo-relativistic Hartree-Fock model including core-polarization effects, for spectral lines in singly ionized zirconium. A detailed comparison with available experimental results is also reported and an overall good agreement is observed between all sets of data allowing us to provide new reliable oscillator strengths for a large amount of Zr II lines in the wavelength region from 1616 to 14746 Å. Moreover, we give radial integral values of the main atomic transitions deduced in this study: 〈4d

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Full hyperfine structure study of singly ionized tantalum

Bouazza

2012

Phys. Scr.

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The configuration system of Ta II, both for odd- and even-parities has been considered on the basis of the experimental data available in the literature. The interpretation has been carried out based on a model space for even-parity and refined multiconfigurational fine structure (fs) calculation including the main Rydberg series configurations mutually interacting for odd parity. The sets of fs parameters, the assignments of term designations, as well as the leading eigenvector percentages of levels relevant for this paper are given very often for the first time. The hyperfine structure (hfs) study that follows reveals erroneous experimental data given previously in the literature and some new data are proposed in their place. The single-electron hfs parameters are determined in their entirely for 181Ta II for the lowest configurations with a good accuracy and compared with ab-initio calculations. Finally, a complete list of the predicted hfs constants A and B of all levels of the model space (5d + 6s)4 was generated.

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Semiempirical hyperfine structure and ab initio isotope shift predictions in Zr II

Cited by 7 publications

References 40 publications

Fine Structure Analysis of the Configuration System of V II. Part I: Even-Parity Levels

Fine Structure Analysis of the Configuration System of V II. Part I: Even-Parity Levels

A comparative study between semi-empirical oscillator strength parametrization and relativistic Hartree–Fock methods for computing the radiative parameters in Zr II spectrum

Full hyperfine structure study of singly ionized tantalum

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