Impact Excitations of Hydrogen Atoms in Collisions with Protons and Antiprotons

作     者：RedaS.Tantawi T.E.I.Nassar 

作者机构：MathematicsDepartmentFacultyofScienceZagazigUniversityZagazigEgypt BasicScienceDepartmentHigherTechnologicalInstituteTenthofRamadaCityEgypt 

出 版 物：《Chinese Physics Letters》 (中国物理快报（英文版）)

年 卷 期：2014年第31卷第8期

页      面：53-57页

核心收录：

学科分类：07[理学] 08[工学] 070203[理学-原子与分子物理] 0827[工学-核科学与技术] 082701[工学-核能科学与工程] 0702[理学-物理学] 

主　　题：HYDROGEN atom RESEARCH ATOMS PROTONS DIFFERENTIAL equations BORN approximation 

摘      要：The direct impact excitations of ground-state hydrogen atoms by protons and antiprotons are investigated by using an impact parameter treatment. The calculations are performed within the solution of the coupled differential equations arising from the one-center atomic-orbital close-coupling approach as well as the impact parameter version of the first and second Born approximations. We have considered calculations that allow couplings to the n=1-5 states （up to g sub-levels） of the target atom as well as others, which neglect the effect of all states other than the initial and final states of the target atom. The sensitivity of the cross sections to the charge of the projectile is studied. The calculated cross sections are compared with those obtained by previous theoretical and experimental results.