电子碰撞原子(e,2e)反应的复极化势

研究包括连续通道等非处理通道的复极化势对(e,2e)碰撞过程三重微分截面的影响,即将耦合通道光学势方法得到的复极化势附加到畸变波玻恩近似方法的畸变势中,在靶态的HF近似下,计算了Ar原子和Ne原子在非共面对称几何条件下(e,2e)反应的三重微分截面.对于较高的入射能量,在实验的误差范围内,计算结果与电子动量谱的实验数据符合较好,复极化势的影响很小;对于较低的入射能量,复极化势的作用明显增大. 关键词： 复极化势 (e;2e)反应 三重微分截面 电子动量谱

The complex polarization potential of the (e,2e) reaction for electron-atom impact

In the paper, we study the influences of the complex polarization potential of the continued channel on the triplet differential cross section of the electron momentum spectroscopy. The complex polarization that are calculated by the coupled channel optical potential method was added to the distorting potentials in the distorted wave Born approximation. In the target Hartree-Fock approximation, we calculated the triple differential cross section (TDCS) of the (e,2e) reaction of 3p, 3s electron argon and 2p, 2s electron neon atom at the incident energies 1500eV and 200eV in the non-coplanar symmetric geometry and compared the theoretical results with the electron momentum spectroscopy (EMS) experimental data. The calculation results agree with the data of the EMS within experimental errors. The influence of polarization potentials at a high incidence energy is very small; but it becomes more notable at a low incidence energy.