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

Abstract

The 3d 3 4p, 3d 3 5p and 3d 2 4s4p odd configurations of the V II spectrum have been reanalysed and three 3d 2 4s4p triplets are assigned higher energies than previously proposed. We have determined the fine structure parameters, the largest and next largest eigenvector percentages of levels, their calculated Landé gJ-factors and predicted positions for missing experimental levels up to 100,000 cm −1 for the 3d 2 4s4p configuration. Furthermore for the first time a hyperfine structure (HFS) parametric treatment, involving levels of these two configurations has been carried out. The deduced single-electron HFS parameter values are successfully checked with those obtained by means of ab initio calculations.

Hyperfine structure, lifetime and oscillator strength of V II

“…means that ab initio lifetime values may help out directly, without introducing weighting factor, in the absence of experimental data. We note that in Table 3 we replaced the level 3d 3 (a 4 F) 4p z 3 D 1 with 3d 3 (a 4 F) 4p z 5 F 1 as corrected in [6].…”

“…Furthermore the 3d 3 4p, 3d 3 5p and 3d 2 4s4p odd configurations for the same ion spectrum have been reanalysed and for the first time an hfs parametric treatment, involving levels of these 3 configurations, has been carried out. The main oneelectron hfs values, for both parities, are gathered and shown in Table 1; one can find the other mono-electronic parameters in [5,6]. To extract magnetic dipole A-values from experimental hfs splitting the electric quadrupole hfs B factors preferably were fixed deliberately to zero in [1,2], because the electric quadrupole moment of 51 V is very small: À 0.05b.…”

“…Furthermore 5 new levels were found. Let us point out that both even-and odd-parity levels of V II had been lately studied too in [5,6]. The fine structure parameters, the largest and next largest eigenvector percentages of levels, their calculated Lande g Jfactors and predicted positions for missing experimental levels up to 100,000 cm À 1 were determined.…”

Fine, hyperfine and Zeeman structures of levels of 123Sb I

“…Furthermore the accuracy of the amplitude of the energy level eigenvector is known to have particularly a strong influence on the determination of the effective mono-electronic hyperfine structure parameters deduced from magnetic dipole A and electric quadrupole B constants, experimentally obtained. For these reasons we propose to extend previous fs studies, using a method successfully tested for atoms: Si I [31], Hf I [32], Zr I [33], and ions: Nb II [34] Ta II [35], V II [36]. This method should find particular application for systems composed of many Rydberg configurations mutually interacting.…”

“…The last but not the least work was done by Hassini et al [8] who reported 138 levels derived from 617 spectral lines in the range 2536 to 24 786 cm −1 . The method applied here for fine and hyperfine structure studies was successfully used previously as regards neutral and singly ionized atoms: Zr I, Hf I, Nb II, Ta II, V II, Ti II [34][35][36]44,45], gathering the set of their studied configurations in model space when it was possible. In the fs calculations we took into account the basis setup consisted of the 7 interacting configurations: 5s 2 5p 2 6s, The spin-orbit integrals ξ nd and ξ 5p effect the interactions with distant configurations.…”