On-shell coupled-channel approach to proton-hydrogen collisions without partial-wave expansion

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A. S. Kadyrov, I. Bray, and A. T. Stelbovics
Centre for Atomic, Molecular and Surface Physics, Division of Science and Engineering, Murdoch University, Perth 6150, Australia

Received 13 October 2005; published 17 January 2006

Afully quantal approach to proton collisions with hydrogen based onthe atomic-orbital close-coupling method is presented. The method leads toa system of coupled three-dimensional momentum-space integral equations for thescattering amplitudes. These equations are reduced to two-dimensional ones usingan on-shell approximation. Furthermore, by considering the symmetry of theproblem, we demonstrate that these can be reduced to justone dimension. The resulting equations are solved without partial-wave expansion.Cross sections for electron transfer in proton collisions with theground state of atomic hydrogen are calculated and shown toagree well with experiment over a wide energy range.

URL:	http://link.aps.org/doi/10.1103/PhysRevA.73.012710
DOI:	10.1103/PhysRevA.73.012710
PACS:	34.70.+e 34.70.+e Charge transfer (atoms and molecules) YEAR: 2006
KEYWORDS:	atom-ion collisions, hydrogen ions, ground states, orbital calculations, charge exchange, hydrogen neutral atoms, integral equations

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