1KeV电子入射单电离氦原子三重微分散射截面的理论研究  

A theoretical study on the triple differential cross section for electron impact ionization of helium at incident energy of 1KeV

作　　者：杨欢 邢玲玲[3] 张穗萌 吴兴举[2] 赵敏福[1] 刘向远 

机构地区：[1]皖西学院实验实训教学管理部,六安237012 [2]皖西学院原子分子与光学应用研究中心,六安237012 [3]皖西学院电气与光电工程学院,六安237012

出　　处：《原子与分子物理学报》2017年第5期891-898,共8页Journal of Atomic and Molecular Physics

基　　金：安徽省高等学校省级自然科学研究重点项目(KJ2016A749);安徽省高等学校省级自然科学研究重点项目(KJ2017A401);安徽省教育厅自然科学研究重点项目(KJ2012A275);安徽省教育厅自然科学研究重点项目(KJ2013A260);安徽省教育厅自然科学研究重点项目(KJ2017A406)

摘　　要：用3C模型、DS3C模型对1KeV电子入射氦原子(e,2e)反应中的三重微分散射截面进行了计算,并将理论计算结果与实验数据进行了比较,研究了各种屏蔽效应对散射平面内以及垂直平面内三重微分散射截面的影响,并对三重微分散射截面变化规律进行了探讨.结果表明:各种屏蔽效应对散射平面内三重微分散射截面的贡献可以忽略;而在垂直平面内,这些效应对三重微分散射截面结构存在较强影响;另外,末态出射电子与靶核的相互作用直接影响散射平面内和垂直平面内截面的结构及其变化规律.Under differential cross the condition of 1KeV incident energy, by making use of 3 C model and DS3C model, the triple sections of electron - impact single ionization of the ground state of helium are calculated. The results are compared with those of corresponding experiments to systematically make a research on the influence of various screening effects on the triple differential cross section in the scattering plane and the perpendicular plane. The change tendency of triple differential cross section is analysed. It is shown that the influences of final channel screening effect and distorting effect on the triple differential cross sections in the scattering plane can be ignored. The influence of these effects on the triple differential cross sections in the perpendicular plane is stron- ger. In addition, the contributions of interreaction between outgoing electrons and nucleus to the change tendency of differential cross sections in the scattering plane and perpendicular plane are stronger.

关 键 词：三重微分散射截面 屏蔽效应 散射平面 垂直平面 

分 类 号：O562.5[理学—原子与分子物理]