The hyperfine structure of the 1s2ns2S and 1s2np2P states (n = 2,3,4, and 5) for the lithium isoelectronic sequence

X.-X. Guan; Z.-W. Wang

doi:10.1007/s100530050105

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Atomic, Molecular, Optical and Plasma Physics

Eur. Phys. J. D 2, 21-27 (1998)
https://doi.org/10.1007/s100530050105

The hyperfine structure of the 1s²ns²S and 1s²np²P states (n = 2,3,4, and 5) for the lithium isoelectronic sequence

X.-X. Guan^a and Z.-W. Wang

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130023, P.R. China

Corresponding author: ^a Mailer-Daemon@mail.jlu.edu.cn

Received: 1 July 1997
Revised: 6 October 1997
Accepted: 29 January 1998
Published online: 15 April 1998

Abstract

The non-relativistic hyperfine structure parameters, the Fermi contact, the spin-dipolar, the orbital and the electronic quadrupole terms, of the lithium-like ground state and low-lying states, $1{\rm s}^2n{\rm s}^2{\rm S}$ and $1{\rm s}^2n{\rm p}^2{\rm P}$ (n=2, 3, 4, and 5), are calculated with the full core plus correlation (FCPC) wave functions. With the 794- and 1185-term Slater-type expansions, the Fermi contact interactions of the $\rm 2^2S$ and $\rm 2^2P$ states in $^7{\rm LiI}$ are determined to be 2.90313 a.u. and -0.21359 a.u., respectively. By using the global identities, the Fermi contact term is also given for the ground state in LiI. The typical patterns of convergence of the expectation values of the Fermi contact interaction for the lithium $1{\rm s}^22{\rm s}$ and $1{\rm s}^22{\rm p}$ states are analyzed. The contribution from the core polarization is examined. The calculated results of the lithium-like systems from LiI to NeVIII are compared with the previous theoretical results obtained with other methods, and with the experimental data available in the literature.