The momentum space coupled channels optical（CCO） method for positron scattering has been extended to study the scattering of positrons by metastable helium for impact energies in the range from the positronium thres...The momentum space coupled channels optical（CCO） method for positron scattering has been extended to study the scattering of positrons by metastable helium for impact energies in the range from the positronium threshold up to high energies. Both the positronium formation and ionization continuum channels are included in the calculations via a complex equivalent local potential. The positronium formation, ionization, elastic and 2~3S–2~3P excitation, and total scattering cross sections are all presented and compared with the available information.展开更多
基金Project supported by the Natural Science Foundation of Heilongjiang Province of China(Grant No.12541160)
文摘The momentum space coupled channels optical（CCO） method for positron scattering has been extended to study the scattering of positrons by metastable helium for impact energies in the range from the positronium threshold up to high energies. Both the positronium formation and ionization continuum channels are included in the calculations via a complex equivalent local potential. The positronium formation, ionization, elastic and 2~3S–2~3P excitation, and total scattering cross sections are all presented and compared with the available information.
