Abstract
The nonperturbative approach developed recently by Tripathy and Rao for the study of charge transfer in proton-hydrogen collisions has been applied to the problem of positronium formation in positron-hydrogen collisions. The cross section for capture into the ground state has been calculated by partially taking into account the Coulomb distortions but neglecting the polarization effect of the target atom. The calculated cross section has a maximum at an incident energy of 10.2 eV, and as the incident positron energy increases it approaches the results of the first Born approximation (FBA) of Massey and Mohr. The calculated results for capture cross sections and differential scattering cross sections for various incident energies have been compared with those from the FBA and other theoretical calculations.
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