Optical potential approach for positron scattering by metastable 2<sup>3</sup> <i>S</i> state of helium

Optical potential approach for positron scattering by metastable 2³ S state of helium

Wu Xi-Gang¹, Cheng Yong-Jun^{2, †}, Liu Fang³, Zhou Ya-Jun²

Present ionization cross sections of positron scattering from the metastable state ( ) and ground state of helium compared with the CCC results for metastable state ( ). Solid line: metastable state; dashed line: ground state; dotted line: CCC results.