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

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.

8 pages Latex with 4 postscript figures

References in corpus (2)

• Electron exchange model potential: Application to positronium-helium scattering
• Positronium-hydrogen-atom scattering in a five-state model

Cited by in corpus (14)

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• Convergent variational calculation of positronium-hydrogen-atom scattering lengths
• Differential cross sections for elastic and inelastic positronium-hydrogen-atom scattering
• Calculations of positronium-atom scattering using a spherical cavity
• Differential and partial cross sections of elastic and inelastic positronium-helium-atom scattering
• Variational calculation of positronium-helium-atom scattering length
• S-, P- and D-wave resonances in positronium-sodium and positronium-potassium scattering
• Positronium scattering by atoms and molecules at low energies
• Many-body theory for positronium scattering and pickoff annihilation in noble-gas atoms
• Resonances in positronium-rubidium and positronium-cesium scattering
• Quenching of $para$-H${}_2$ with an ultra-cold anti-hydrogen atom ${\bar{H}}_{1s}$