类Li和类Be等电子序列离子基组态能量的Z相关修正

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。

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

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.