非线性激光场中电子与氦原子的散射研究  

Electron-He Scattering in Non-liner Laser Field

作　　者：王晓文[1] 梁明超[2] 朱遵略[1] 

机构地区：[1]河南师范大学物理与信息工程学院 [2]江西理工大学应用科学学院

出　　处：《河南师范大学学报（自然科学版）》2010年第2期76-79,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(10874064);河南省基础与前沿技术研究项目(092300410038);河南省自然科学基金(2008A140008);河南省骨干教师项目(2008043)

摘　　要：应用玻恩近似理论,在一种特殊的散射模式(非线性激光场的波矢k垂直于散射平面,极化方向x^,y^互相垂直且都垂直于k)下,利用静电屏蔽的Yukawa势,计算了非线性激光场中氦原子被电子散射的微分散射截面.从计算结果中可以看出,频率参数p和交换光子数的不同对微分散射截面的变化趋势影响较大.这也间接说明了这些散射过程中原子亚稳态俘获现象的存在.The differential cross sections of e-helium are calculated by using the analytic screening electric Yukawa potential in the non-liner laser field and empolying the Born approximation in an especial scattering geometry （the wave vector K^→ perpendicular to the scattering plane,and the polarization direction x^^、y^^,inter- perpendicular,moreover,they are entirely perpendicular to K^→）. From these results,it can be found that the different exchanges of photons and the frequency parameter p have a considerable effect on the change of the DCSs. These phenomena show indirectly that there are metastable atom trapping in these scatt ering processes.

关 键 词：激光辅助散射 非线性激光场 玻恩近似 微分散射截面 

分 类 号：O562.5[理学—原子与分子物理]