交换势对光电离截面的影响  

The effects of exchange potential on atomic photoionization cross section

作　　者：刘晓斌[1] 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

出　　处：《原子与分子物理学报》2008年第3期619-623,共5页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(10575075)

摘　　要：利用相对论平均自洽场理论,研究了光电离截面在不同交换势下的差异,在对这种差异进行分析的基础上,对其变化规律做了较详细的理论说明.计算结果表明:光电离截面随交换系数的增大而增大;电子所感受到的平均核势场越小,交换势所起的作用则相对地有所增加,从而对光电离截面的影响更大.Based on relativistic average self-consistent field, the difference of photoionization cross section within different exchange potential have been studied systemically, Finally the theoretical explains of these difference in photoionization cross section are given. Our calculated results indicate that photoionization cross section is increased with exchange coefficient, the influence of exchange potential on cross section is stronger oppositely when the average nuclear potential is feeble.

关 键 词：相对论自洽场 光电离 截面 交换势 

分 类 号：O562.4[理学—原子与分子物理]