共面不对称条件下Ar原子(e,2e)反应的三重微分截面  

Triple differential cross sections of the (e,2e) reaction for electron impact Ar in a coplanar asymmetric geometry

作　　者：高瑞军[1] 葛自明[1] 

机构地区：[1]华东理工大学理学院物理系,上海200237

出　　处：《物理学报》2010年第3期1702-1706,共5页Acta Physica Sinica

摘　　要：采用修正的扭曲波玻恩近似(DWBA)方法,计算了共面、大能量损失和小动量转移这一特殊几何条件下电子碰撞Ar(3p6)(e,2e)反应的三重微分截面.理论方法对(e,2e)反应过程近程极化势进行了修正,并引入Gamow因子表示后碰撞相互作用(PCI).将计算结果与实验结果、标准DWBA计算结果及Gamow因子修正后的DWBA-G计算结果进行了比较,发现极化效应起着重要的作用.The triple differential cross section for Ar（3p^6） in the special geometry of coplanar large energy loss and close to minimum momentum transfer has been calculated with the modified distorted wave Born approximation （DWBA）. The polarization interaction between the electron and the target, especially in the near-targe tregion, and the post-collision interactions are included in the calculation. The theoretical results with modified DWBA are compared with the recent experimental data, the standard DWBA and DWBA-G. It is shown that the polarization are very important in the calculation of TDCS in coplanar asymmetric （e,2e） reaction .

关 键 词：能量损失 动量转移 极化效应 后碰撞相互作用 

分 类 号：O562.5[理学—原子与分子物理]