Positronium-Atom Collisions
Atomic Physics
2015-06-26 v1
Abstract
New results are presented for Ps(1s) scattering by H(1s), He(1S) and Li(2s). Calculations have been performed in a coupled state framework, usually employing pseudostates, and allowing for excitation of both the Ps and the atom. In the Ps(1s)-H(1s) calculations the H formation channel has also been included using a highly accurate H wave function. Resonances resulting from unstable states in which the positron orbits H have been calculated and analysed. The new Ps(1s)-He(1S) calculations still fail to resolve existing discrepancies between theory and experiment at very low energies. The possible importance of the Ps formation channel in all three collision systems is discussed.
Cite
@article{arxiv.physics/0401125,
title = {Positronium-Atom Collisions},
author = {H R J Walters and A C H Yu and S Sahoo and Sharon Gilmore},
journal= {arXiv preprint arXiv:physics/0401125},
year = {2015}
}
Comments
19 pages, 8 figures. Nucl. Instrum. methods B Accepted