中国物理B ›› 2008, Vol. 17 ›› Issue (9): 3322-3328.doi: 10.1088/1674-1056/17/9/030

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Isotope effect in collision between heliumatom and hydrogen bromide molecule

程新路1, 杨向东1, 余春日2   

  1. (1)Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China; (2)School of Physics {& Electric Engineering, Anqing Teachers College, Anqing 246133, China
  • 收稿日期:2007-11-23 修回日期:2008-04-21 出版日期:2008-09-08 发布日期:2008-09-08
  • 基金资助:
    Project supported by the Natural Science Foundation of Anhui Education Bureau of China and the National Natural Science Foundation of China (Grant Nos 10676025 and 10574096)

Isotope effect in collision between heliumatom and hydrogen bromide molecule

Yu Chun-Ri(余春日)a)†, Cheng Xin-Lu(程新路)b), and Yang Xiang-Dong(杨向东)b)‡   

  1. a School of Physics & Electric Engineering, Anqing Teachers College, Anqing 246133, China; b Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
  • Received:2007-11-23 Revised:2008-04-21 Online:2008-09-08 Published:2008-09-08
  • Supported by:
    Project supported by the Natural Science Foundation of Anhui Education Bureau of China and the National Natural Science Foundation of China (Grant Nos 10676025 and 10574096)

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摘要： The anisotropic potential developed in our previous research and the close-coupling method are applied to the HBr--$^{3}$He ($^{4}$He, $^{5}$He, $^{6}$He, $^{7}$He) system, and the partial cross sections (PCSs) at the incident energy of 60\,meV 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-excited 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

Abstract: The anisotropic potential developed in our previous research and the close-coupling method are applied to the HBr--$^{3}$He ($^{4}$He, $^{5}$He, $^{6}$He, $^{7}$He) system, and the partial cross sections (PCSs) at the incident energy of 60 meV 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-excited 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.

Key words: isotope effect, partial cross section, anisotropic potential, HBr--He collision

中图分类号:  (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))

  • 34.50.Fa
34.20.Gj (Intermolecular and atom-molecule potentials and forces) 34.50.Gb (Electronic excitation and ionization of molecules)