理论计算电子碰撞氢分子(e,2e)反应的三重微分截面

摘要

通过发展的分子畸变波玻恩近似( MDW BA)方法,把坐标空间的分子多中心问题转化为动量空间的单中心问题,入射电子、散射电子以及被电离电子的波函数都使用了畸变波表象,经过求解动量空间Lippmann-Schwinger方程获得电子的畸变波函数.应用MDWBA方法计算了共面非对称动力学条件下入射能量为100 eV的电子碰撞氢分子(e,2e)反应的三重散射微分截面,并与其它理论和实验结果进行了比较.MDWBA方法的计算结果与实验结果符合的很好.%The momentum-space molecular distorted-wave approximation (MDWBA) model is developed, which transform the multiple center problem of molecules in coordinate space to a single center problem in momentum space. In the MDWBA model, the incident, the scattered, and the ejected electron wave functions are obtained from solving the Lippmann-Schwinger Equations. Using this approach, the triple differential cross sections for electron-impact ionization of hydrogen molecule in the coplanar asymmetric geometry at incident energies of lOOeV are calculated, and compared with the existing experimental and theoretical data. From the comparison, the present calculations are giving an overall good representation of the experimental data.