不共面对称条件下电子离化He原子的三重微分截面  

(e,2e) Triple-differential Cross Sections of Helium in Non-coplanar Symmetric Geometry

作　　者：吴兴举[1] 宋军[1] 张穗萌[1] 

机构地区：[1]皖西学院数理系,安徽六安237012

出　　处：《安徽师范大学学报（自然科学版）》2006年第2期127-129,共3页Journal of Anhui Normal University(Natural Science)

基　　金：安徽省自然科学基金(03046203);安徽省教育厅自然科学基金;安徽省高校优秀中青年骨干教师专项基金(2003022)

摘　　要：运用修正后的BBK理论计算了入射能E0=64.6eV,不共面对称等能条件下电子入射离化氦原子的三重微分截面,所得结果与实验进行比较,符合较好.指出:对3C波函数进行索末菲参量的修正是成功的,这一修正使得BBK模型也能对不共面对称等能条件下的低能(e,2e)过程给出很好的描述.In this paper, the modified BBK theory is applied to election-impact ionization of atomic helium at incident energies of 64.6eV. The triple-differential cross sections （TDCSs） are presented for the case of equal energy sharing of the excess energy in non - coplanar symmetric geometry. The calculated TDCSs are generally in good agreement with experiment. It is showed that the BBK model which is modified by the introduction of effective Sommerfeld parameters can also give a good description of the low-energy （e, 2e） processes in non- coplanar symmetric energy-sharing geometry.

关 键 词：BBK模型 索末菲参量 三重微分截面 不共面对称等能条件 

分 类 号：O561.5[理学—原子与分子物理]