Optical potential approach for positron scattering by metastable 23S state of helium
Wu Xi-Gang1, Cheng Yong-Jun2, †, Liu Fang3, Zhou Ya-Jun2
Total scattering cross sections of positron impact on helium from its metastable state () and ground state along with the CCC results for metastable state (). Solid line: metastable state; dashed line: ground state; dotted line: CCC.