Theoretical analysis on fully differential cross sections for C^(6+)impact ionization of helium

作     者：方小英 张瑞芳 段慧晓 孙世艳 贾祥富 

作者机构：Center for Molecules Research School of Physics and Information Engineering Shanxi Normal University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2014年第23卷第6期

页      面：188-192页

核心收录：

学科分类：07[理学] 070203[理学-原子与分子物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.11274215) the Natural Science Foundation of Shanxi Province,China(Grants Nos.20051008 and 2010011009) the Technology Project of Shanxi Provincial Education Department,China(Grant No.20111011) 

主　　题：ion-impact ionization fully differential cross section four-body model interference effect 

摘      要：Fully differential cross sections （FDCS） are calculated within a four-body model for single ionization of helium by C6＋ impact at the incident energy of 100 MeV/a.u. （atomic unit）. The results are compared with experimental data and other theoretical predictions. It is shown that our results are in very good agreement with experiment for three small momentum transfers in the scattering plane; however, some significant discrepancies are still present at the largest momentum transfer in both the scattering plane and the perpendicular plane. In actuality, the problem has not been explained by the theory during the last decade. Accordingly, the contributions of different scattering amplitudes to FDCS are analyzed. It is found that for the largest momentum transfer the cross section arising from a destructive interference of the three amplitudes is much smaller than the experimental data. However, the cross section due to the constructive interference of two scattering amplitudes between projectile-ionized electron interaction and projectile-passive electron interaction almost approaches the experimental data.