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arXiv 1801.02258physics.atom-ph
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类铍氙的$1s^2\,2s\,2p\, ^3P_{0,2}$态的Binding energies

Binding energies of the $1s^2\,2s\,2p\, ^3P_{0,2}$ states of berylliumlike xenon

A. V. Malyshev, D. A. Glazov, Yu. S. Kozhedub, M. Yu. Kaygorodov, I. I. Tupitsyn, V. M. Shabaev, G. Plunien

摘要:

用从头算QED方法计算了类铍氙中$1s^2\,2s\,2p$电子组态的$^3P_0$和$^3P_2$能级的结合能。所有相关的单电子和多电子QED的贡献占到第二阶的微扰理论。在Breit近似下考虑了第三阶和更高阶的电子间相互作用效应。核反冲效应也被考虑在内。此外,我们还利用组态相互作用的Dirac-Fock-Sturm方法研究了类铍氖、铁和氙中$1s^2\,2s\,2p$组态的所有可能能级,即$^1P_1$和$^3P_{0,1,2}$.在这种情况下,QED效应近似地在模型QED方法内处理。所得到的理论预测与以前的相对论计算和高精度测量的结果进行了比较。

英文摘要:

Binding energies of the $^3P_0$ and $^3P_2$ levels of the $1s^2\,2s\,2p$ electron configuration in berylliumlike xenon are rigorously evaluated using ab initio QED approach. All relevant one- and many-electron QED contributions are accounted for up to the second order of the perturbation theory. The interelectronic-interaction effects of the third and higher orders are considered within the Breit approximation. Nuclear recoil effect is taken into account as well. In addition, we study all possible levels of the configuration $1s^2\,2s\,2p$, namely $^1P_1$ and $^3P_{0,1,2}$, by means of the configuration-interaction Dirac-Fock-Sturm method in berylliumlike neon, iron, and xenon. In this case the QED effects are treated approximately within the model QED approach. The obtained theoretical predictions are compared with the results of previous relativistic calculations and high-precision measurements.

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