类锂体系(Z=11～20)1s^24s-1s^2np(5≤n≤9)跃迁能和振子强度的理论计算

Theoretical calculations of transition energies and dipole oscillator strengths for 4~2S—n^2P transitions of the lithium isoelectronic sequence from Z= 11 to 20

利用全实加关联的方法计算类锂体系(Z=11～20)1s^24s—1s^2np(5≤n≤9)的跃迁能,将相对论效应(电子动能的相对论修正,Darwin项,电子—电子接触项以及轨道—轨道相互作用)和质量极化效应作为微扰,计算了它们对体系能量的修正.利用得到的波函数和跃迁能计算了核电荷Z=11～20的类锂离子的1s^24s—1s^2np(5≤n≤9)偶极跃迁的长度、速度和加速度三种规范下的振子强度,与现有的实验数据比较,结果符合得很好.

On the basis of the successful calculations on the structure and property of lithium-like systems,the characteristic FCPC method is extended to lithium-like systems with higher nuclear charge and extrapolated to higher energy region. The excitation energies for the transitions 1s^24s--1s^2np （5 ≤n≤ 9） from Z= 11 to 20 are calculated. The dipole oscillator strengths for the transitions 1s^24s -1s^2np （5 ≤n≤9） from Z=11 to 20 are calculated too. Compared with the experimental data available in the literature, it appears that the agreement of the results with them is satisfactory.