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Coupling between positron-atom scattering channels above the first inelastic threshold


Reference:

Coleman, P. G., Cheesman, N. and Lowry, E. R., 2009. Coupling between positron-atom scattering channels above the first inelastic threshold. Physical Review Letters, 102 (17), 173201.

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Official URL:

http://dx.doi.org/10.1103/PhysRevLett.102.173201

Abstract

Experimentally determined cross sections for the elastic scattering of positrons by argon and xenon atoms have been found to exhibit a steplike increase at the first inelastic threshold energy-i.e., that for positronium formation. Rather than supporting the existence of a cusplike behavior predicted theoretically, this feature, which is more pronounced for xenon, suggests the existence of an intermediate virtual positronium state which enhances the elastic interaction probability.

Details

Item Type Articles
CreatorsColeman, P. G., Cheesman, N. and Lowry, E. R.
DOI10.1103/PhysRevLett.102.173201
DepartmentsFaculty of Science > Physics
RefereedYes
StatusPublished
ID Code14346

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