库仑波玻恩近似下电子与离子碰撞激发

ELECTRON-ION IMPACT EXCITATIONCALCULATION IN COULOMB-BORN APPROXIMATION

本文扼要阐述了在库仑波玻恩近似下,电子与离子碰撞激发截面的理论推导。其中采用了电子与离子系统的LS耦合表象,考虑了交换效应,仔细处理了碰撞矩阵元的角部分因子。并编制了相应的程序—CBX(9)。该程序可以计算包括复杂离子和较低能的入射电子等情况,有较广泛的适应性。计算结果与其它方法作了比较,符合较好。

This paper briefly describes the theoretical deduction of the cross section of electron -ion impact excitation in Coulomb -Born approximation. The LS coupling representation of electron -ion system is used, the exchange effect is taken into account and the angular factors of collision matrix elements are treated in detail. The corresponding code-CBX(9) is programed. The situations of complex ions and incident electrons with lower energy can be computed by the code, which has wide applicability. The computational results are in well agreement with ones obtained from the other methods.