高电荷态类锂等电子序列(Z=31~40)1s22p态能级结构的理论计算

利用多组态Dirac-Fock方法，本文研究了高电荷态类锂等电子序列（Z=31~40）离子1s22p激发态的精细结构. 考虑高关联轨道的电子关联影响以及Breit相互作用、量子电动力学效应和原子核运动效应等高阶修正，计算了2P1/2和2P3/2精细能级的本征能量，能级劈裂结果与已有理论计算一致. 结果表明，类锂离子1s22p态精细结构劈裂满足高电荷态的等电子序列标度规律（~ Z4）；发现离子空间尺寸随着原子序数增加收缩,相对论轨道1s1/2和2p3/2的径向电荷密度分布趋向于原子核.

Theoretical calculation on energy levels of 1s22p state for highly charged Li-like isoelectronic sequence (Z=31~40)

The fine structures of 1s22p state in the highly charged Li-like isoelectronic sequence ions (Z=31~40) are investigated using the multi-configuration Dirac-Fock method. With inclusion of the correlation effect from the high correlation orbital as well as the high-order correction from the Breit interaction, quantum electrodynamics and nuclear motion effects, the energies of fine structure levels 2P1/2 and 2P3/2 are calculated, and the energy splitting obtained agrees well with the theoretical data available. The results show that the fine structure splitting of 1s22p state in Li-like ions satisfies the scaling law (~ Z4) of highly charged isoelectric sequence. As the atomic number increases, the distribution of the radial electronic density approaches to the nucleus for the relativistic orbitals 1s1/2 and 2p3/2, indicating the smaller radius of the Li-like ion.