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Vibrational-Resonance Enhancement of Positron Annihilation in Molecules

Gilbert, Stephen J; Barnes, L D; Sullivan, James; Surko, Clifford M


A first study of positron annihilation as a function of positron energy was performed. The rate of annihilation of low-energy positrons in molecular gases was discussed. It was shown that the large observed values of annihilation rates are due to the excitation of long-lived vibrational resonances of the positron-molecule complex. The results are consistent with a theoretical model of resonant annihilation.

CollectionsANU Research Publications
Date published: 2002
Type: Journal article
Source: Physical Review Letters


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