锂原子光电离截面的无穷阶计算(英文)  

The infinite-order calculations for the photoionization cross sections of lithium above thresholds

作　　者：马晓光[1] 

机构地区：[1]鲁东大学物理系,烟台264025

出　　处：《原子与分子物理学报》2009年第1期34-38,共5页Journal of Atomic and Molecular Physics

基　　金：鲁东大学博士启动基金(22270301);鲁东大学重点科研项目(L20072804)

摘　　要：利用多体微扰理论,把基态锂原子K和L壳层电子的光电离过程中的电子相关效应计算到了无穷阶.用Feynman图技术讨论了基态关联效应和混相近似效应,并计算了与无穷阶末态关联的耦合效应.计算结果与实验和其他理论结果吻合得很好.Using many-body perturbation theory (MBPT), the infinite-order perturbation calculations have been performed for the photoionization cross sections of the K and L shells in the ground state ls^22s^2S of the neutral lithium above the Li^+ls2s^3S, Li^+ls^(21)S thresholds respectively. The ground-state and random-phase approximation correlations coupled with infinite-order final-state correlations have been discussed by Feynman diagrams in detail. Comparison is made with other theoretical calculations and recent experimental results for the pure single photoionization of the K and L shells respectively. Very good agreement with experimental results has been obtained.

关 键 词：光电离 多体微扰理论 锂原子 耦合方程方法 

分 类 号：O561.5[理学—原子与分子物理]