Elastic and inelastic positron－helium scattering

doi:10.1088/1674-1056/19/6/063405

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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Elastic and inelastic positron－helium scattering

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