100MeV／amuC6＋碰撞氦原子单电离的全微分截面  

Fully differential cross section for single ionization of helium by 100 MeV/amu C^(6+) impact

作　　者：陆晨文 安文芳 孙世艳[1] 贾祥富[1] 

机构地区：[1]山西师范大学物信学院,山西师范大学大分子科学研究中心,临汾041004

出　　处：《原子与分子物理学报》2016年第1期88-93,共6页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11274215);山西省自然科学基金(2010011009)

摘　　要：利用全量子方法改进且加入核核作用(PT)的修正库仑玻恩近似(MCBPT)和前人基于半经典的方法且不考虑核核作用的修正库仑玻恩近似(MCB)计算了散射平面和垂直平面内100 Me V/amu C6+单电离氦原子的全微分截面,研究了核核作用对截面的影响.其结果与实验数据和3DW理论进行了比较.发现,对于小动量转移,MCBPT计算结果与实验符合的很好;对于大动量转移,MCB结果很好的反映了实验数据.而且,我们详细的分析了扭曲势效应对截面的影响,结果表明随着动量转移的增加扭曲势效应迅速增强.The modified Coulomb- Born approximation including the internuclear interaction （MCBPT） with a full quantum - mechanical way, and the previous semiclassical MCB model （ without the internuclear interac- tion）, is applied to calculate the fully differential cross section （FDCS） for single ionization of helium by 100 MeV//amu C6＋ impact. We study the effects of the internuclear interaction on the FDCS in the scattering plane and the perpendicular plane. Comparisons are made with absolute experimental data and the 3DW results and we find that the MCBPT theory provides better results for small momentum transfer, whereas the MCB calculations are better for large momentum transfer. Furthermore, the influence of the distorting potential effects on the FDCS is discussed. It turns out that the distorting potential effects become significantly important with increasing momentum transfer.

关 键 词：修正的库仑玻恩近似 全微分截面 核核作用 扭曲势效应 

分 类 号：O56[理学—原子与分子物理]