Phys. Rev. Lett. 88, 043201 (2002) [4 pages]Vibrational-Resonance Enhancement of Positron Annihilation in MoleculesSee Also: Erratum Received 8 August 2001; published 11 January 2002 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. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.043201
DOI:
10.1103/PhysRevLett.88.043201
PACS:
34.85.+x, 34.50.-s, 71.60.+z, 78.70.Bj
See AlsoErratum: S. J. Gilbert, L. D. Barnes, J. P. Sullivan, and C. M. Surko, Erratum: Vibrational-Resonance Enhancement of Positron Annihilation in Molecules [Phys. Rev. Lett. 88, 043201 (2002)], Phys. Rev. Lett. 88, 079901 (2002). |
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