中高能入射条件下裸碳离子碰撞氦原子单电离的全微分截面(英文)  

Fully differential cross-sections in single ionization of helium by C^(6+) impact at intermediate and high collision energies

作　　者：张瑞芳[1] 方小英[1] 段慧晓 孙世艳[1] 贾祥富[1] 

机构地区：[1]山西师范大学物理与信息工程学院,山阴0410001

出　　处：《原子与分子物理学报》2014年第3期508-514,共7页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金项目(11274215)

摘　　要：利用四体模型计算了100和2MeV/amu裸碳单电离氦原子的全微分截面,其结果与实验数据和其它理论进行了比较.对于高能入射情况,在散射平面小动量转移和中间动量转移时现在的理论结果和实验符合的很好,然而在大动量转移时和在垂直平面有明显差异.对于低能入射情况,四体结果定性与实验结果一致,而且优于三体扭曲波(3DW-EIS)结果,表明四体效应在低能入射比在高能入射时明显.We use the four-body model to calculate the fully differential cross sections （FDCS） for the single ionization of helium by 100 and 2 MeV/amu C6＋ impact for different momentum transfers and ejected electron energies. The results are compared with the corresponding experimental data and other theoretical results. For the higher impact energy of 100 MeV/amu, the present results are in agreement with the experimental values at small and intermediate momentum transfers in the scattering plane, but at large momentum transfer and outside the scattering plane the agreement is not satisfied. For the lower impact energy of 2 MeV/amu, the experimental results are basically qualitatively reproduced by our theoretical results and the agreement with experiment is better than the three-body distorted wave-eikonal initial state （3DW-EIS）. We find that the four-body effect is more obvious at lower impact energy than that at higher impact energy.

关 键 词：离子碰撞原子电离 全微分截面 四体模型 

分 类 号：O56[理学—原子与分子物理]