安徽大学学报（自然科学版）2011，Vol.35Issue(6)：41-47,7.
电子碰撞电离氦原子的三重微分截面
TDCS of elctron-impact ionization of helium
摘要
Abstract
The triple differential cross sections (TDCS) for electron-impact ionization of helium (e,2e) reaction, using the method of partial wave expansions within the framework of first-order born approximation, were calculated at incident energies of 634.59, 604.59, 400, 250 and 150 Ev respectively. The results were compared with experimental measurements. It was obtained that the theoretical results using the full distorted wave bom approximation had a better agreement with the experimental results at incident energies of 604.59, 400 and 250 ev. For the case of incident energy of 634. 59 ev, better agreement with the experimental result was achieved if the 40 ev ejected electron was described by a Coulomb wave instead of the distorted wave. The trend, observed by the paper ( Ehrhatdt H, Hesselbacher K H, Jung K, et al. Collisional ionization of helium by 250 ev electrons; experiments with completely determined kinetics [ J]. J Phys B: At Opt Mol Phys, 1972, 5:2107-2116) , for changes of the relative intensity of the recoil peak and the angular position of the binary peak with ejected electron energy at a fixed scattering angle, has been confirmed.关键词
三重微分截面/扭曲波/平面波/库仑波/Recoil峰/Binary峰Key words
triple differential cross section/ distorted wave/ plane wave/ Coulomb wave/ Recoil peak/ Binary peak分类
数理科学引用本文复制引用
肖全志,贾昌春,章韦芳,陈姣姣..电子碰撞电离氦原子的三重微分截面[J].安徽大学学报（自然科学版）,2011,35(6):41-47,7.基金项目
2006年安徽大学人才引进基金资助项目 （）
