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

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, 3d 3 ( 2 F )4 s c 3 F and 3 d 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 4 s 2 1 D 2 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 (3 d + 4 s ) 4 with good accuracy. For the model space (3 d + 4 s ) 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.