Scattering of positronium by H, He, Ne, and Ar
P. K. Biswas, Sadhan K. Adhikari
Abstract
The low-energy scattering of ortho positronium (Ps) by H, He, Ne, and Ar atoms has been investigated in the coupled-channel framework by using a recently proposed time-reversal-symmetric nonlocal electron-exchange model potential with a single parameter C. For H and He we use a three-Ps-state coupled-channel model and for Ar and Ne we use a static-exchange model. The sensitivity of the results is studied with respect to the parameter C. Present low-energy cross sections for He, Ne and Ar are in good agreement with experiment.
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