中国物理B ›› 2010, Vol. 19 ›› Issue (6): 63405-063405.doi: 10.1088/1674-1056/19/6/063405
程勇军, 周雅君
Cheng Yong-Jun(程勇军)† and Zhou Ya-Jun(周雅君)
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.
中图分类号: (Positron scattering)