C^(6+)单离化He原子的微分散射截面研究  

The Study of TDCS for Single Ionization of Helium By C^(6+)

作　　者：潘哲峰[1] 祖新慧[1,1] 

机构地区：[1]沈阳航空工业学院理学系,辽宁沈阳110034

出　　处：《辽宁大学学报（自然科学版）》2010年第3期233-235,共3页Journal of Liaoning University：Natural Sciences Edition

基　　金：国家自然科学基金项目

摘　　要：在电子离化氢原子的碰撞过程即(e,2e)反应的基础上,采用不同于已有的波恩近似、BBK(MBrauner J S Briggs and HKlar)、收敛密偶近似(CCC)等方法,从双势公式的后滞形式出发采用解析方法来计算重离子C6+离化He原子在不同动量转移和出射电子能量时的三重微分散射截面(TDCS),并分析讨论了有效电荷的影响,通过选择不同的有效电荷使理论计算和实验数据有较好的符合.Unlike others quite a number of theoretical approaches to deal with the electron-impact ionization problems,such as Born approximation,BBK（M Brauner J S Briggs and H Klar） and CCC（the convergent close-coupling）.In this paper,we use analytical approach to deal with the（e,2e） reaction of atomic hydrogen.Our model start point is the post form of two-potential formula of transitions matrix element on the energy shell,in order to get the exact three-body wave-function in the initial channel,we decouple the full kinetic energy operator into two parts by introducing a real parameter（its reciprocal is structure parameter）.In the same time,by virtue of the same parameter the total energy of the system also is decomposed into two parts.But just because of introducing the real parameter,the bound and continuum wave function of slow electron does not orthogonality absolutely.So the first term of the ionization amplitude has contribution to the TDCS.We discuss the influence by introducing an effective charge in the final state wave function and research the effect by adjusting the effective charge.

关 键 词：重离子 三重微分散射截面 双势公式 有效电荷 

分 类 号：O53[理学—等离子体物理]