氢原子(e,2e)反应离化振幅的分析(英文)

Analysis of the ionization amplitude of(e,2e) on hydrogen

利用双势公式的后滞形式并且在入射的快电子近似的取为平面波的基础上,在共面非对称几何条件下计算了电子离化氢原子的三重微分散射截面.变换矩阵元可以解析的表示为结构散射因子和关联因子的乘积形式(关联因子和结构散射因子分别对应于recoil peak和binary peak)解决了由于大量的数值计算而带来的麻烦.本文引入一个有效电荷,通过对它进行调整考虑了变换矩阵元中的第一项的影响.最后把计算结果与实验结果及他人的结果进行了比较,与实验结果符合的很好.

The triple differential cross sections for ionization of atomic hydrogen by fast electron impact are computed in the case of asymmetric coplanar geometry. By using the post form of the transition matrix element and the two-potential formulae, and base on the approximation of projectile plane wave the transition matrix elements are analytically expressed to be a product of two factors： the structure-scattering factor and the correlation one. By introducing an effective charge, the influence of the first term of the transition matrix element is considered that makes our model more perfect and the results give good agreement with experimental measurement.