Ab initio calculations of the {33}S 3p4 3P_J and {33}S- / {37,35}Cl 3p5 2Po_J hyperfine structures

TL;DR

This paper uses advanced computational methods to calculate hyperfine structures of sulfur and chlorine isotopes, achieving good agreement with experimental data and providing new theoretical estimates for unmeasured sulfur states.

Contribution

The study applies multi-configuration Hartree-Fock calculations to hyperfine structures of sulfur and chlorine isotopes, including the first theoretical estimate for sulfur's unmeasured state.

Findings

Good agreement with observed hyperfine structures for chlorine isotopes.

First theoretical estimate of sulfur's 3P_J hyperfine structure.

Discussion on atomic core description in MCHF theory.

Abstract

We present highly correlated multi-configuration Hartree-Fock (MCHF) calculations of the hyperfine structure of the 3p5 2Po_J levels of {33}S- and {35,37}Cl. We obtain a good agreement with observation. The hyperfine structure of the neutral sulfur {33}S 3p4 3P_J lowest multiplet that has never been measured to the knowledge of the authors, is also estimated theoretically. We discuss some interesting observations made on the description of the atomic core in MCHF theory.