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Chin. Phys. B, 2008, Vol. 17(9): 3322-3328    DOI: 10.1088/1674-1056/17/9/030
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

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)
a School of Physics & Electric Engineering, Anqing Teachers College, Anqing 246133, China; b Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China
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.
Keywords:  isotope effect      partial cross section      anisotropic potential      HBr--He collision  
Received:  23 November 2007      Revised:  21 April 2008      Accepted manuscript online: 
PACS:  34.50.Fa (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))  
  34.20.Gj (Intermolecular and atom-molecule potentials and forces)  
  34.50.Gb (Electronic excitation and ionization of molecules)  
Fund: 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)

Cite this article: 

Yu Chun-Ri(余春日), Cheng Xin-Lu(程新路), and Yang Xiang-Dong(杨向东) Isotope effect in collision between heliumatom and hydrogen bromide molecule 2008 Chin. Phys. B 17 3322

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