氦原子与氟化氢分子碰撞的同位素效应  

Isotope Effect for the Collisions between Helium Atoms and Hydrogen Fluoride Molecules

作　　者：潘康生[1,2] 史守华[1] 余春日[2] 

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230039 [2]安庆师范学院物理与电气工程学院,安徽安庆246133

出　　处：《武汉大学学报（理学版）》2009年第2期171-176,共6页Journal of Wuhan University:Natural Science Edition

基　　金：国家自然科学基金资助项目(10676025)

摘　　要：基于He-HF相互作用势,用密耦方法求解散射方程,计算了E=86 meV时3He(4He,6He,8He,10He)-HF碰撞的弹性和非弹性分波截面,并详细地讨论了氦同位素原子对分波截面的影响.结果表明:对确定的碰撞体系和给定的碰撞能量,激发分波截面比弹性分波截面收敛快.激发态越高,截面收敛越快;尾部效应仅在弹性散射和低激发态中产生,高激发态中不产生尾部效应.随着体系约化质量的增大,弹性分波截面和态-态激发分波截面收敛速度递减,收敛需要的分波数增多.Based on the He-HF interaction potential developed in our previous research, the elastic and inelastic partial cross sections （PCSs） for collisions between ^3He （^4 He, ^6He, ^8He, ^10 He） atoms and HF molecules are calculated by using the close-coupling approach to solve the scattering equation. The calculations are performed at the incident energy of 86 meV. The influences of the isotope helium atoms on the PCSs are discussed in detail. The results show that the excitation PCSs converge faster than the elastic PCSs for the given collision energy and system. The excitation PCSs converge more rapidly for the higher excited states. The tail effect is present only in elastic scattering and lower excited states but not in higher excited states. With the increase of the reduced mass of the system, the converging speed of the elastic and state to-state excitation PCSs slows down, and the convergent partial wave number increases.

关 键 词：同位素效应 分波散射截面 He-HF碰撞 

分 类 号：O561.5[理学—原子与分子物理]