类Li和类Be等电子序列离子基组态能量的Z相关修正  

Z-dependent corrections for ground configuration energies of Li and Be-like ions

作　　者：牟致栋[1] 魏琦瑛[1] 叶世旺[1] 

机构地区：[1]中国矿业大学理学院,江苏徐州221008

出　　处：《原子与分子物理学报》2005年第2期238-242,共5页Journal of Atomic and Molecular Physics

基　　金：中国矿业大学科技基金资助(OK4522)

摘　　要：在相对论多体微扰理论和屏蔽理论的基础上,本文提出了一种计算等电子序列离子基组态能量的新方法,通过引入一个与核电荷数Z相关的能量修正函数γ(Z)来考虑由于忽略能量的高阶项对原子体系基组态能量的影响。在对类Li(Z=3～50)和类Be(Z=4～50)等电子序列离子的基组态能量所进行的理论计算研究结果表明,Z相关能量修正对于原子体系基组态能量的准确计算是有效的。Based on Relativistic many-body perturbation theory (RMBPT) and screening theory for many-electron atomic system, we put forward a Z-dependent energy correction functions for calculation of ground configuration energies of middle-low Z isoelectronic sequence ions. In present work, we reported the energies of Li and Be-like ions from Z=3 to Z=50 and Z=4 to Z=50, respectively. The energies calculated by introducing the Z-dependent correction functions are in excellent agreement with the available experimental data. These results show itself that the Z-dependent correction function is essential for accurate calculation of ground configuration energies of small atomic system like Li and Be-like sequence ions.

关 键 词：相对论多体微扰理论(RMBPT) 屏蔽理论 类Li和类Be等电子序列离子 基组态能量 Z相关能量修正 

分 类 号：O562.1[理学—原子与分子物理]