Vibrational-Resonance Enhancement of Positron Annihilation in Molecules
Authors:
Top Cited Papers
- 11 January 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 88 (4) , 043201
Abstract
The rate of annihilation of low-energy positrons in many molecular gases is orders of magnitude larger than can be explained on the basis of simple collisions. Developments in positron beam technology have enabled the first energy-resolved measurements of this annihilation process. The results of these experiments provide direct evidence that the large observed values of annihilation rate are due to the excitation of long-lived vibrational resonances of the positron-molecule complex. These results are generally consistent with a recent theoretical model of resonant annihilation.Keywords
This publication has 22 references indexed in Scilit:
- Excitation of Electronic States of Ar,, andby Positron ImpactPhysical Review Letters, 2001
- Excitation of Molecular Vibrations by Positron ImpactPhysical Review Letters, 2001
- Positronic Lithium, an Electronically StableGround StatePhysical Review Letters, 1997
- Creation of a monoenergetic pulsed positron beamApplied Physics Letters, 1997
- Measurements of positron-annihilation rates on moleculesPhysical Review A, 1995
- Mass spectrometry studies of the ionization of organic molecules by low-energy positronsChemical Physics Letters, 1993
- Bound states of positrons and large moleculesPhysical Review Letters, 1988
- Interaction of positron beams with surfaces, thin films, and interfacesReviews of Modern Physics, 1988
- Positron lifetime spectra for gasesCanadian Journal of Physics, 1982
- Rapid Annihilations of Positrons in Polyatomic GasesPhysical Review Letters, 1963