1967•Proceedings of the Physical SocietyOpen access
Positronium formation by positron impact on hydrogen
B H Bransden, Z Jundi
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Abstract
The cross section for positronium formation by positron impact on hydrogen is calculated in the two-state approximation, taking account of the polarization of the hydrogen and positronium atoms in each channel. It is found that the polarization forces dominate the cross section near the threshold for positronium formation and evidence is presented for the existence of a positronium-proton virtual bound state that gives rise to a resonance in elastic e + -H scattering just below the formation threshold.
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