TITLE:
Fine Structure Analysis of the Configuration System of V II. Part I: Even-Parity Levels
AUTHORS:
Safa Bouazza, Richard A. Holt, David S. Rosner, Nathan M. R. Armstrong
KEYWORDS:
Fine Structure, Hyperfine Structure, Energy Levels, Ab-Initio Calculations, V II Spectrum
JOURNAL NAME:
Journal of Modern Physics,
Vol.5 No.7,
April
29,
2014
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 3d24s2 1D2 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.