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Effects of the electron correlation and Breit and hyperfine interactions on the lifetime of the 2p53s states in neutral neon

par Li, Jiguang ;Jönsson, Per;Godefroid, Michel ;Dong, Chenzhong;Gaigalas, Gediminas
Référence Physical review. A, Atomic, Molecular, and Optical Physics, 86, 5, 052523
Publication Publié, 2012-11

Article révisé par les pairs

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Résumé :

In the framework of the multiconfiguration Dirac-Hartree-Fock method, we investigate the transition properties of four excited states in the 2p53s configuration of neutral neon. The electron correlation effects are taken into account systematically by using the active space approach. The effect of higher-order correlation on fine structures is shown. We also study the influence of the Breit interaction and find that it reduces the oscillator strength of the 3P1o-1S0 transition by 17%. It turns out that the inclusion of the Breit interaction is essential even for such a light atomic system. Our ab initio calculated line strengths, oscillator strengths, and transition rates are compared with other theoretical values and experimental measurements. Good agreement is found except for the 3P2o-1S0 M2 transition for which discrepancies of around 15% between theories and experiments remain. In addition, the impact of hyperfine interactions on the lifetimes of the 3P0o and 3P2o metastable states is investigated for the 21Ne isotope (I=3/2). We find that hyperfine interactions reduce the lifetimes drastically. For the 3P0o state the lifetime is decreased by a factor of 630. © 2012 American Physical Society.