Isotope effect in collision between helium atom and hydrogen bromide molecule  

作　　者：余春日 程新路 杨向东 

机构地区：[1]School of Physics & Electric Engineering,Anqing Teachers College [2]Institute of Atomic and Molecular Physics,Sichuan University

出　　处：《Chinese Physics B》2008年第9期3322-3328,共7页中国物理B（英文版）

基　　金：supported by the Natural Science Foundation of Anhui Education Bureau of China;the National Natural Science Foundation of China (Grant Nos 10676025 and 10574096)

摘　　要：The anisotropic potential developed in our previous research and the close-coupling method are applied to the HBr-3He （4He, 5He, 6He, 7He） system, and the partial cross sections （PCSs） at the incident energy of 60meV are calculated. Based on the calculations, the influences of the isotope helium atom on PCSs are discussed in detail. The results show that the excitation PCSs converge faster than the elastic PCSs for the collision energy and the systems considered here. Also the excitation PCSs converge more rapidly for the high-excited states. The tail effect is present only in elastic scattering and low-exclted states but not in high-excited states. With the increase of reduced mass of the collision system, the converging speed of the elastic and excitation PCSs slows down, and the tail effect goes up.The anisotropic potential developed in our previous research and the close-coupling method are applied to the HBr-3He （4He, 5He, 6He, 7He） system, and the partial cross sections （PCSs） at the incident energy of 60meV are calculated. Based on the calculations, the influences of the isotope helium atom on PCSs are discussed in detail. The results show that the excitation PCSs converge faster than the elastic PCSs for the collision energy and the systems considered here. Also the excitation PCSs converge more rapidly for the high-excited states. The tail effect is present only in elastic scattering and low-exclted states but not in high-excited states. With the increase of reduced mass of the collision system, the converging speed of the elastic and excitation PCSs slows down, and the tail effect goes up.

关 键 词：isotope effect partial cross section anisotropic potential HBr-He collision 

分 类 号：O562.6[理学—原子与分子物理]