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

Safa Bouazza, Richard A. Holt, David S. Rosner, Nathan M. R. Armstrong

Department of Physics and Astronomy, Mc Master University, Hamilton, Canada.
Department of Physics and Astronomy, University of Western Ontario, London, Canada.
LISM, Université de Champagne-Ardenne, Reims, France.

DOI: 10.4236/jmp.2014.57061                

Abstract

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, 3d³(²F)4s c ³F and 3d⁴ d ³F, 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 3d²4s^{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 ⁵¹V II for the model space (3d + 4s)⁴ with good accuracy. For the model space (3d + 4s)⁴ of ⁵¹V 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.

Keywords

Fine Structure, Hyperfine Structure, Energy Levels, Ab-Initio Calculations, V II Spectrum

Conflicts of Interest

The authors declare no conflicts of interest.

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