Fine-structure analysis of the odd-parity Rydberg series of Zr I

Abstract

A fine-structure (fs) analysis of the odd-parity Rydberg series of atomic zirconium, including the main low-lying mutually interacting configurations, has been performed for the first time, with the aid of a linked-parameter method of level fitting. A set of derived fs parameters, together with ab initio values calculated for comparison, and the leading eigenvector percentages of the levels were obtained. Many of the levels belonging to the 4d25s5p, 4d5s25p and 4d35p configurations are found to be incorrectly assigned. To confirm this major revision, specific mass shifts deduced from experimental isotope shift data available in the literature have been used as fingerprints. Finally, a complete set of predicted magnetic dipole and electric quadrupole hyperfine structure constants has been calculated for the known odd-parity levels in zirconium.

Hyperfine structure, lifetime and oscillator strength of V II

“…The interpretation has been carried out, as for instance in [11][12][13], based on a model space for even-parity and refined multiconfiguration fine structure calculation including some strongly interacting configurations for odd-parity. We also computed through ab initio procedure V II lifetime values, having this time recourse to Cowan code.…”

“…Using a linkedparameter technique of level-fitting calculations [9][10][11][12][13] in a multiconfiguration basis a parameteric analysis of fine structure for even-parity levels of V II, involving six configurations, has been performed and the single-electron hfs parameters are determined in their entirety for 51 V II for the model space (3dþ4s) 4 with good confidence, as is seen by the standard deviation value obtained for fitted parameters: 1.3 mK. 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.…”

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.…”

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

“…As mentioned in our past work, the complex configuration-interaction between the odd-parity levels, especially between 3d4s 2 4p, 3d 2 4s4p and 3d 3 4p of V II, would make this work difficult. To overcome this, we use the extensively tested method of [10]- [12] that is suitable for systems of many mutually interacting Rydberg configurations, with the fs Hamiltonian of [13]- [17]. For this work on V II, we used the following as the configuration basis set: 3d4s 2 4p, 3d4s 2 5p, 3d 2 4s4p, 3d 2 4s5p, 3d 3 4p, 3d 3 5p.…”