Hyperfine structure of Li and Be^+

TL;DR

This paper presents a comprehensive relativistic CI calculation of hyperfine structures in lithium and beryllium ions, incorporating QED and nuclear effects for accurate predictions of energy splittings.

Contribution

It introduces a large-scale relativistic CI approach combined with QED and nuclear corrections for precise hyperfine structure calculations in Li and Be+ ions.

Findings

Numerical results for multiple states of Li and Be+ ions.

Inclusion of QED, nuclear-magnetization, recoil, and negative-continuum effects.

Enhanced accuracy in hyperfine splitting predictions.

Abstract

A large-scale relativistic configuration-interaction (CI) calculation is performed for the magnetic-dipole and the electric-quadrupole hyperfine structure splitting in ^{7,6}Li and ^9Be^+. Numerical results for the 2^2S, 3^2S, 2^2P_{1/2}, and 2^2P_{3/2} states are reported. The CI calculation based on the Dirac-Coulomb-Breit Hamiltonian is supplemented with separate treatments of the QED, nuclear-magnetization distribution, recoil, and negative-continuum effects.