CAJ | 학술논문

用扭曲波方法，推广了修正的库仑波恩( MCB)近似计算到重离子碰撞He原子电离问题计算。检查了对75 keV 质子碰撞氦原子单电离的全微分截面的应用情况。结果表明，现在的方法定性地产生了实验的峰结构，尤其是在垂直平面。应用MCB方法研究这一碰撞体系中的后碰撞( PCI)效应，发现PCI效应对全微分截面的形状在散射平面和垂直平面都有着强烈的影响。同时，分析了扭曲效应对全微分截面的贡献。表明，随着动量转移的增加，扭曲效应的作用变得越来越重要。尤其是，扭曲效应定性解释了负角区域的结构。
용뉴곡파방법，추엄료수정적고륜파은( MCB)근사계산도중리자팽당He원자전리문제계산。검사료대75 keV 질자팽당양원자단전리적전미분절면적응용정황。결과표명，현재적방법정성지산생료실험적봉결구，우기시재수직평면。응용MCB방법연구저일팽당체계중적후팽당( PCI)효응，발현PCI효응대전미분절면적형상재산사평면화수직평면도유착강렬적영향。동시，분석료뉴곡효응대전미분절면적공헌。표명，수착동량전이적증가，뉴곡효응적작용변득월래월중요。우기시，뉴곡효응정성해석료부각구역적결구。
The modified Coulomb-Born ( MCB) approximation is applied to study single ionization of helium by 75 keV proton impact. Fully differential cross-sections ( FDCS) are calculated using the MCB theory in both the scattering plane and the perpendicular plane for the first time. The results are compared with the experimen-tal data and the MCB without postcollision interaction ( MCB-noPCI) calculations. It is found that the present MCB calculations qualitatively reproduce the experimental peak structures, especially in the perpendicular plane. And the PCI has a profound impact on the shape of the fully differential cross section in both the scattering plane and the perpendicular plane. The contribution of the distorted effects to the FDCS is also analyzed in the scatter-ing and perpendicular planes. It turns out that, with the increasing momentum transfers ( difference between the initial and scattered projectile momentum) , the role of the distorted effects becomes more and more important. In particular, the distorted effects qualitatively predict the structures at negative angles region at all momentum transfers in the scattering plane.