Effect of H- ion formation on Positronium-Hydrogen elastic scattering
Abstract
Effect of charge-transfer recombination for positronium (Ps) scattering is studied on Ps-H system using coupled-channel formalism considering a new rearrangement channel Ps+H --> e+ + H- and exchange. The correlation and continuum effects introduced by this charge-transfer channel result to substantial convergence to the low energy scattering parameters. Effects on scattering length, PsH binding energy, and low-energy (0-10 eV) phase-shifts and cross sections are evaluated and H- formation cross sections are reported from above the threshold (6.438 eV) to 100 eV.
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