氖原子与H_2(D_2、T_2)分子碰撞微分截面的理论研究  

A Theoretical Study of the Differential Cross Sections for Ne-H_2(D_2、T_2) Collisions

作　　者：蒋德琼[1] 李旭[1] 魏强[1] 

机构地区：[1]四川师范大学物理系,四川成都610066

出　　处：《四川师范大学学报（自然科学版）》2003年第5期486-489,共4页Journal of Sichuan Normal University（Natural Science）

基　　金：四川省教育厅重点科研基金资助项目

摘　　要：用公认精确度较高的密耦近似方法和Tang Toennies势模型计算了不同能量下惰性气体原子Ne与H2及其同位素D2、T2替代碰撞体系的转动激发碰撞截面.通过分析Ne H2、D2、T2各碰撞体系微分截面的差异,总结出在H2分子的对称同位素替代情形下Ne H2(D2、T2)碰撞体系微分截面的变化规律.结果表明,体系的约化质量及入射原子相对碰撞能量的变化均给体系的微分截面带来不同程度的影响.In this paper, closecoupling equation and TangToennies potential are applied to the NeH2(D2、T2) system, the rotational excitation cross sections at different incident energy are calculated. By analyzing the differences of the differential cross sections for symmetric isotopically substituted systems NeH2、D2、T2, the change patterns of the differential cross sections are obtained, as well as the influence on the differential cross sections because of the variations in the mass of systems and the relative kinetic energy of incoming atoms is discussed.

关 键 词：能量变化 同位素替代 微分截面 密耦近似 

分 类 号：O561.1[理学—原子与分子物理]