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Chin. Phys. B, 2010, Vol. 19(6): 063405    DOI: 10.1088/1674-1056/19/6/063405
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Elastic and inelastic positron-helium scattering

Cheng Yong-Jun(程勇军) and Zhou Ya-Jun(周雅君)
Natural Science Research Center, the Academy of Fundamental and Interdisciplinary Science, Harbin Institute of Technology, Harbin 150080, China
Abstract  Elastic and inelastic positron--helium scatterings have been investigated with the coupled-channel optical method (CCO). Ionization continuum and positronium formation channels are included via a complex equivalent-local optical potential. Calculations are reported of cross sections of elastic scattering, total excitation and $n$ = 2, 3, and 4 excitations of ground-state helium for incident energies from 30~eV to 400~eV. The present calculation shows that the ionization and Ps-formation channels significantly affect the cross sections of elastic and inelastic positron--helium scatterings.
Keywords:  positron      helium      elastic scattering      excitation  
Received:  29 October 2009      Accepted manuscript online: 
PACS:  34.80.Uv (Positron scattering)  
  36.10.Dr (Positronium)  
Fund: Project supported by the Natural Scientific Research Innovation Foundation of Harbin Institute of Technology (Grant No.~2009077).

Cite this article: 

Cheng Yong-Jun(程勇军) and Zhou Ya-Jun(周雅君) Elastic and inelastic positron-helium scattering 2010 Chin. Phys. B 19 063405

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