Xe(4d^(10))(e,2e)反应三重微分截面的理论研究

Theoretical calculation of triple differential cross sections of(e,2e) for Xe 4d

采用修正后的扭曲波玻恩近似理论,计算了共面不对称几何条件下Xe(4d^(10))(e,2e)反应的三重微分截面.散射电子能量为1000 eV,敲出电子能量为20 eV,散射电子角度分别固定在2°,4°和7.5°.理论计算与Avaldi等人的实验结果和扭曲波玻恩近似理论计算进行了比较,发现出射电子之间的后碰撞相互作用较弱,极化效应在反应过程中起着重要作用.

The（e,2e） triple differential cross sections of the 4d orbitals of Xe have been calculated using the modified distorted wave Born approximation in eoplanar asymmetric geometry. The energy of scat- tered electron is 1000 eV,and the energy of ejected electron is 20 eV. The scattered electron is selected at 2°, 4°and 7.5°. Our theoretical calculations have been compared with experimental and theoretical results of Avaldi et al. It is show that the post-collision interaction between two outgoing electrons is weak,and polarization effect is very important in（e, 2e）reaction.