理论计算电子碰撞氢分子(e,2e)反应的三重微分截面

Theoretical studies oftriple differential cross section for(e,2e) reaction of molecular hydrogen by electron

通过发展的分子畸变波玻恩近似(MDWBA)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 devel- oped, 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 elec- tron 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 exper- imental and theoretical data. From the comparison, the present calculations are giving an overall good representation of the experimental data.