%0 Journal Article
%T Theoretical calculation of ionization potential and term energy of the ground states 1s22s of lithium-like systems from Z=21 to 30<br>类锂体系(Z=21—30)基态1s22s电离能和相对论项能的理论计算
%A Ge Zi-Ming
%A Wang Zhi-Wen
%A Zhou Ya-Jun
%A <br>葛自明
%A 王治文
%A 周雅君
%J 物理学报
%D 2004
%I 
%X In the paper, the full-core plus correlation (FCPC) and the minimizing the expectation value of the Hamiltonian method is extended to calculate the non-relativistic energies and the wave functions of 1s22s states for the lithium-like systems from Z=21 to 30. The mass-polarization and the relativistic correction included the kinetic-energy correction, the Darwin term, the electron-electron contact term, and the orbit-orbit interaction are calculated perturbatively as first-order correction. The contribution from quantum electrodynamic (QED) is also included by using the effective nuclear charge formula. The ionization potential and term energies of the ground states 1s22s are given and compared with other's theoretical calculation and experimental results. It is shown that the FCPC methods are also effective to theoretical calculation of the ionic structure for high nuclear ion of lithium-like systems.
%K lithium-like systems
%K full core plus correlation
%K ionization energy
%K term-energy<br>类锂体系，
%K 全实加关联，
%K 电离能，
%K 项能
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=1032EE22B6259105&yid=D0E58B75BFD8E51C&vid=8E6AB9C3EBAAE921&iid=CA4FD0336C81A37A&sid=ECE8E54D6034F642&eid=F4B561950EE1D31A&journal_id=1000-3290&journal_name=物理学报&referenced_num=2&reference_num=17