Scattering of positronium by H, He, Ne, and Ar

Details Scattering of positronium by H, He, Ne, and Ar Scattering of positronium by H, He, Ne, and Ar

2000-01-11

arxiv.org/abs/physics/0001024v1

Chem.Phys.Lett. 317 (2000) 129-134

Physics

Atomic Physics

8 pages Latex with 4 postscript figures

Scientific paper

10.1016/S0009-2614(99)01354-8

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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