Differential cross sections for elastic and inelastic positronium-hydrogen-atom scattering

Details Differential cross sections for elastic and inelastic positronium-hydrogen-atom scattering Differential cross sections for elastic and inelastic positronium-hydrogen-atom scattering

2000-12-17

arxiv.org/abs/physics/0012040v1

Phys. Rev. A 63 (2001) 054502 (1-4)

Physics

Atomic Physics

9 pages, 6 ps figures, Accepted in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.63.054502

We report results of differential cross sections for elastic scattering, target-elastic Ps excitations and target-inelastic excitation of hydrogen in a five-state coupled-channel model allowing for Ps(1s)H(2s,2p) and Ps(2s,2p)H(1s) excitations using a recently proposed time-reversal-symmetric regularized electron-exchange model potential. The present model yields a singlet Ps-H S-wave resonance at 4.01 eV of width 0.15 eV and a P-wave resonance at 5.08 eV of width 0.004 eV. We also study the effect of the inclusion of the excited Ps and H states on the convergence of the coupled-channel scheme.

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