一维库仑三体系统中电子碰撞导致的(e,2e)电离截面

(e,2e) IONIZATION CROSS SECTION IN ONE\|DIMENSIONAL COULOMB THREE\|BODY SYSTEMS

用经典力学的方法 ,研究了三种不同类型的一维库仑三体模型在总能量大于零时 (e ,2e)电离截面与总能量的关系 .发现了不同的模型的 (e ,2e)电离截面有不同的阈值行为 ;即s波模型 ,共线e-Ze-和Ze-e-模型的 (e ,2e)电离截面在阈值附近分别遵守线性律 ,Wannier定律和平方根律 .还对所得数值结果作了理论分析 .

We have studied the classical theory of (e,2e) collision between electron and atoms or ions based on three kinds of one\|dimensional models, i.e., the s\|wave model, the collinear e - \%Z\%e - and \%Z\%e - e - models. We find numerically the relation of ionization cross sections with increasing energy obey different threshold laws, i.e., the linear law, Wannier law and square root law. These results have been also discussed analytically.