Elastic and inelastic positron－helium scattering

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

中国物理B ›› 2010, Vol. 19 ›› Issue (6): 63405-063405.doi: 10.1088/1674-1056/19/6/063405

Elastic and inelastic positron－helium scattering

程勇军, 周雅君

Natural Science Research Center, the Academy of Fundamental and Interdisciplinary Science, Harbin Institute of Technology, Harbin 150080, China

收稿日期:2009-10-29 出版日期:2010-06-15 发布日期:2010-06-15
基金资助:
Project supported by the Natural Scientific Research Innovation Foundation of Harbin Institute of Technology (Grant No.~2009077).

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

Received:2009-10-29 Online:2010-06-15 Published:2010-06-15
Supported by:
Project supported by the Natural Scientific Research Innovation Foundation of Harbin Institute of Technology (Grant No.~2009077).

摘要/Abstract

摘要： 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.

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.

Key words: positron, helium, elastic scattering, excitation

中图分类号: (Positron scattering)

34.80.Uv

36.10.Dr (Positronium)

程勇军, 周雅君. Elastic and inelastic positron－helium scattering[J]. 中国物理B, 2010, 19(6): 63405-063405.

Cheng Yong-Jun(程勇军) and Zhou Ya-Jun(周雅君). Elastic and inelastic positron－helium scattering[J]. Chin. Phys. B, 2010, 19(6): 63405-063405.

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Elastic and inelastic positron－helium scattering

Elastic and inelastic positron－helium scattering

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