Positronium atom scattering by H_2 in a coupled-channel framework
Atomic and Molecular Clusters
2009-11-06 v1 Chemical Physics
Abstract
The scattering of ortho positronium (Ps) by H has been investigated using a three-Ps-state [Ps(1s,2s,2p)HX )] coupled-channel model and using Born approximation for higher excitations and ionization of Ps and B and b excitations of H. We employ a recently proposed time-reversal-symmetric nonlocal electron-exchange model potential. We present a calculational scheme for solving the body-frame fixed-nuclei coupled-channel scattering equations for Ps-H, which simplifies the numerical solution technique considerably. Ps ionization is found to have the leading contribution to target-elastic and all target-inelastic processes. The total cross sections at low and medium energies are in good agreement with experiment.
Keywords
Cite
@article{arxiv.physics/0012039,
title = {Positronium atom scattering by H_2 in a coupled-channel framework},
author = {P. K. Biswas and Sadhan K. Adhikari},
journal= {arXiv preprint arXiv:physics/0012039},
year = {2009}
}
Comments
10 pages, 4 ps figures