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正电子碰撞Ag,In,Sn原子L壳层电离截面的理论计算

Theoretical calculation of L-shell ionization cross section of Ag,In,and Sn atoms by positron impact
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摘要 在David Botz分析模型的基础上,综合考虑正电子及电子碰撞电离的库仑效应和电子交换效应,引入离子效应和相对论效应修正因子,计算了Ag,In,Sn原子的L壳层电离截面.计算结果表明,引入了修正因子的计算结果明显优于平面波波恩近似和扭曲波波恩近似的计算结果,并和最近文献的实验值符合得较好.其计算结果可为激光等离子体模拟提供准确参数. Based on the analytical formulas of David Botz, considering the Coulo：nb effect and exchange effect in the ionization by positron and electron impact, the total cross sections of positron-impact L- shell ionization of Ag, In, Sn atomic are calculated by incorporating both ionic and relativistic corrections in it. In comparison with the quantum mechanical predictions of plane-wave and distorted-wave Born approximations, it is found that the improved analytical formulas are in better agreement with the experimental results. The calculated results can be used to simlate the laser plasma.
作者 何彪 何建新 易有根 江少恩 郑志坚
机构地区 国防科学技术大学理学院 湖南城市学院计算机科学系 中南大学物理科学与技术学院 中国工程物理研究院高密度等离子体物理国家重点实验室
出处 《原子与分子物理学报》 CAS CSCD 北大核心 2011年第4期692-696,共5页 Journal of Atomic and Molecular Physics
基金 国家自然科学基金(10275056) 国防科技重点实验室基金(51480010104ZS7702)
关键词 L壳层 电离截面 正电子 L-shell, ionization cross section, positron
分类号 O652 [理学—分析化学]
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参考文献18

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原子与分子物理学报
2011年 第4期

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