高电荷态类锂等电子序列(Z=31~40)1s^22p态能级结构的理论计算  

Theoretical calculation on energy levels of 1s^22p state for highly charged Li-like isoelectronic sequence(Z=31~40)

作　　者：胡木宏[1,2] 刘博文 徐恩慧 马玉龙 吴勇 HU Mu-Hong;LIU Bo-Wen;XU En-Hui;MA Yu-Long;WU Yong(School of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China;Institute of Applied Physics and Computational Mathematics,Beijing 100094,China)

机构地区：[1]辽宁师范大学物理与电子技术学院,大连116029 [2]北京应用物理与计算数学研究所,北京100094

出　　处：《原子与分子物理学报》2020年第6期819-823,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金青年基金(11804136)。

摘　　要：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1s^22p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1s^22p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.The fine structures of 1s^22p 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 1s^22p 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 1 s1/2 and 2 p3/2,indicating the smaller radius of the Li-like ion.

关 键 词：多组态DIRAC-FOCK方法 类锂等电子序列 1s^22p态精细结构劈裂 电荷密度 

分 类 号：O562.1[理学—原子与分子物理]