原子光电离过程中的Cooper最小  

The Cooper-minimum structure in atomic photoionization cross sections

作　　者：刘晓斌[1] 董晨钟[2] 邢永忠[1] 

机构地区：[1]天水师范学院物理与信息科学学院,天水741000 [2]西北师范大学物理与电子工程学院,兰州730070

出　　处：《原子与分子物理学报》2008年第2期412-416,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10376026,10447006)

摘　　要：利用Dirac-Slater相对论自洽场理论,研究了入射光子能量较小时Na和K原子最外壳层电子的光电离截面的变化规律及其s和p壳层的Cooper最小,在论述Cooper最小的产生原因及其基本特征的基础上,分析了影响Cooper最小的主要因素原子实、主量子数、角量子数以及总量子数等,并对这种影响进行了较为详细的理论说明.Based on Dirac-Slater relativistic self-consistent field,the examples of cooper-minimum in photoionization have been found in numerical calculations within a single-electron model at low energies.In these calculations for photoionization of Na and K we find cooper-minimum in the s and p subshells.Our calculated results indicate that the main factors what influence the position of cooper-minimum are atomic core,principal quantum number,angular momentum operator and so on.Finally the theoretical explains of these influence of cooper-minimum in photoionization cross section are given.

关 键 词：相对论理论 光电离 截面 Cooper最小 

分 类 号：O562.4[理学—原子与分子物理]