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Differential cross sections for collisions between He isotope atoms and HBr molecules

Yu Chun-Ri Zhang Jie Wang Rong-Kai Yang Xiang-Dong

Differential cross sections for collisions between He isotope atoms and HBr molecules

Yu Chun-Ri, Zhang Jie, Wang Rong-Kai, Yang Xiang-Dong
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Publishing process
  • Received Date:  28 October 2007
  • Accepted Date:  14 June 2008
  • Published Online:  20 January 2009

Differential cross sections for collisions between He isotope atoms and HBr molecules

  • 1. (1)安庆师范学院物理与电气工程学院,安庆 246133; (2)贵州师范大学理学院,贵阳 550001; (3)四川大学原子与分子物理研究所,成都 610065

Abstract: Differential cross sections (DCSs) for collisions in 3He-HBr, 4He-HBr, 6He-HBr and 7He-HBr are calculated by the close-coupling approach from the anisotropic intermolecular potential of the He-HBr system established by the author. The calculations are performed separately at the collision energies of 40 and 75 meV. The influence of the incident isotope He atoms on DCSs is discussed in detail. The results show that the angular distribution of the total DCSs at zero degree increases and the position of oscillation minimum of the same order gradually shifts towards small scattering angle along with the increase of the incident isotope He atom mass at identical collision energy. And crossing angle between the elastic and total inelastic DCSs gradually decreases and the total inelastic DCS gradually increases. The rainbow phenomenon becomes more evident the lower the collision energy and the larger mass of the incident He isotope atom.

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