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Positronium-Atom Collisions | | H R J Walters
; A C H Yu
; S Sahoo
; Sharon Gilmore
; | | Date: |
25 Dec 2003 | | Subject: | Atomic Physics | physics.atom-ph | | Abstract: | New results are presented for Ps(1s) scattering by H(1s), He(1$^1$S) 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(1$^1$S) 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. | | Source: | arXiv, physics/0401125 | | Services: | Forum | Review | PDF | Favorites | |
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