70.6eV电子入射电离氦原子的理论研究  

Theoretical Study for Electron Impact Ionization of Helium at Incident Energy of 70.6eV

作　　者：杨欢[1,2] 邢玲玲[3] 张穗萌[2] 吴兴举[2] 

机构地区：[1]皖西学院实验实训教学管理部,安徽六安237012 [2]皖西学院原子与分子物理研究所,安徽六安237012 [3]皖西学院电气与光电工程学院,安徽六安237012

出　　处：《安徽师范大学学报（自然科学版）》2017年第2期139-144,共6页Journal of Anhui Normal University(Natural Science)

基　　金：安徽省高等学校省级自然科学研究重点项目(KJ2016A749);安徽省教育厅自然科学研究重点项目(KJ2012A275);安徽省自然科学基金青年项目(1408085QA13)

摘　　要：在入射能为70.6eV,两个出射电子等能分享几何条件下,分别用3C模型和DS3C模型对散射平面内以及垂直平面内电子离化氦原子的三重微分散射截面进行了计算,并把计算结果与实验结果进行了比较,系统研究了各种效应对截面的贡献.结果表明:当散射角较小时,末态各种屏蔽效应对散射平面内和垂直平面内截面幅度以及角分布均存在较强影响;交换效应对截面的贡献始终是不可忽略的.3C model and DS3C model are applied to study the single ionization of helium by 70.6eV electronimpact. Triple differential cross sections are calculated in the scattering plane and perpendicular plane for equalenergy sharing kinematics, and comparisons are made with experimental measurements. The contribution ofscreening effect to the differential cross section is discussed. It is shown that the influence of final channelscreening effect on the amplitude and angular distribution of triple differential cross sections in the scattering andperpendicular plane is stronger when at low scattered angle. The contribution of exchange effect to thedifferential cross section is not ignored.

关 键 词：DS3C模型 等能分享 散射平面 垂直平面 

分 类 号：O561.5[理学—原子与分子物理]