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.
出处
《河南师范大学学报（自然科学版）》
CAS
CSCD
北大核心
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)
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
Laser-assisted scattering
non-liner laser field
Born approximation
differential cross section
