Positronium scattering by a hydrogen molecule including exchange

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作者：

Universidade Estadual Paulista, Sao Paulo, Brazil ^{[1
]}

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来源：

J Phys B At Mol Opt Phys | / 18卷 / L737-L743期

关键词：

Approximation theory - Electron energy levels - Electron scattering - Electron transitions - Ionization - Mathematical models;

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摘要：

We perform a three-positronium (Ps) state [Ps(1s, 2s, 2p)] coupled-channel calculation of Ps-H2 scattering including the effect of electron exchange. At medium energies, higher excitations and ionization of Ps are treated within the framework of the first Born approximation. In both cases exchange is included using a recently proposed nonlocal model exchange potential which is free of non-orthogonality problems common in the usual antisymmetrization scheme. The present total cross sections at low and medium energies are in encouraging agreement with experiment.

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