中国物理B ›› 2014, Vol. 23 ›› Issue (6): 63404-063404.doi: 10.1088/1674-1056/23/6/063404
• ATOMIC AND MOLECULAR PHYSICS • 上一篇 下一篇
方小英, 张瑞芳, 段慧晓, 孙世艳, 贾祥富
Fang Xiao-Ying (方小英), Zhang Rui-Fang (张瑞芳), Duan Hui-Xiao (段慧晓), Sun Shi-Yan (孙世艳), Jia Xiang-Fu (贾祥富)
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.
中图分类号: (Atomic excitation and ionization)