Abstract
Two S-wave resonances in the positron–helium system are calculated using the stabilization method. A model potential for helium is used to represent the He+ ion core and the outer electron. Hylleraas-type wavefunctions are used to represent the correlation effects between the outer electron, the positron and the He+ core. Resonance energies and widths for two resonances lying below the Ps (n = 2) threshold are reported.
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