【摘要】 在Berakdar工作的基础上,从动量相关的角度入手,导出了任意几何条件下的索末菲参量。并由此计算了入射能为50eV和150eV时,电子入射离化He原子的三重微分截面(TDCS)。将计算结果与相应的实验测量和CCC理论结果进行比较发现:尽管计算与实验略有偏差,但总体上符合得较好更多还原

【Abstract】 In this paper, following the work of Berakdar, the momentum correlation in the three body Coulomb continuum problem is considered by the introduction of effective Sommerfeld parameters for both symmetric and asymmetric geometry. The triple differential cross sections for electron impact ionization of atomic helium at incident energies of 50 and 150 eV in asymmetric geomerty are calculated. Results of this approach are compared with the absolute measurements and the only existing theoretical results of the convergent colse coupling method. We generally find that this approach gives good agreement with experiment, though some small quantitative discrepancies remain.更多还原