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Observation of Threshold Effects in Positron Scattering from the Noble Gases

Jones, Adric; Caradonna, Peter; Makochekanwa, Casten; Slaughter, Daniel; McEachran, Robert; Machacek, Joshua; Sullivan, James; Buckman, Stephen


Channel coupling is a phenomenon that has been investigated for many scattering processes, and is responsible for the formation of cusps or steps in the cross sections for open scattering channels at, or near, the onset of a new scattering channel. It has long been speculated that the opening of the positronium formation channel may lead to the formation of such cusp features in the elastic positron scattering cross section. In this work, elastic scattering of positrons has been measured in the...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.105.073201


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