Many body study of $g$-factor in boron-like argon

Abstract

Highly accurate measurements of the $g$-factor of boronlike Ar are currently implemented within the ARTEMIS experiment at GSI (Darmstadt, Germany) and within the ALPHATRAP experiment at the MPIK (Heidelberg, Germany). A comparison with the corresponding theoretical predictions will allow one to test the modern methods of bound-state QED. However, at least three different theoretical values of the \emph{g}-factor have been published up to date. The systematic study of the \emph{g} factor value of Ar${}^{13+}$ in the ground $[(1s{)}^2(2s{)}^{2}2p{]}^2{P}_{1/2}$ and the first excited $[(1s{)}^2(2s{)}^{2}2p{]}^2{P}_{3/2}$ states is performed within the high order coupled cluster and configuration interaction theories up to the full configuration interaction treatment. Correlation contributions are discussed and results are compared with previous studies.

arXiv comment7 pages, no figures

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