第二玻恩近似理论研究激光辅助e-Ar散射

在电子入射方向平行于激光场的极化方向这种特殊的散射模式下，应用第二玻恩近似(SBA)理论，分别利用含有极化势的静电屏蔽势和单纯的静电屏蔽势这两种原子势模型对激光场中电子-氩原子散射进行了研究，并与低频近似和实验数据进行了比较.结果表明，第二玻恩近似理论给出的结果与实验符合较好.另外，极化势在激光辅助电子-原子散射中起着重要作用. 关键词： 极化势 第二玻恩近似 微分截面 激光场

On the second Born approximation for laser-assisted e-Ar scattering

The absolute differential cross sections of e-Ar scattering in laser field are calculated employing the second Born approximation with the static screen potential including polarization potential and the single static screen potential in the special scattering geometry that the incident electron beam is parallel to the polarization direction of laser field. The second Born approximation gives better results than the low-frequency whem formula when compared with the experimental data, and it is found that the electron-atom polarization potential plays an important role in laser-assisted electron-atom scattering.