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中文摘要：
利用BBK理论及其修正模型,计算了入射能64.6 eV、不同枪角情况下,电子碰撞电离氦原子（e,2e）反应的三重微分散射截面.分析了曲线结构,对其内部碰撞机制进行了详细的研究和探讨.结果表明：在非共面几何条件下,碰撞微分截面上所呈现出来的特征是由多种效应共同作用所决定的,随着条件的不同而相互转化.且在垂随入射几何条件下,末通道存在着极强的动力学屏蔽.
英文摘要：
The triple differential cross sections for electron impact ionization helium（e,2e） reactions are calculated by use of the BBK and modified BBK model at different gun angles of incident electron energy 64.6 eV.The structures of the cross sections and the physical natures of these structures are discussed in detail.It is found that for the non-coplanar geometry,cross sections are determined by a variety of effects together and these effects are converted to each other under different conditions.Moreover,strong dynamical screening effect is observed in the final state of the perpendicular plane symmetric geometry.
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