Vibrational-resonance enhancement of positron annihilation in molecules

S. J. Gilbert*, L. D. Barnes, J. P. Sullivan, C. M. Surko

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

128 Citations (Scopus)


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.

Original languageEnglish
Article number043201
Pages (from-to)432011-432014
Number of pages4
JournalPhysical Review Letters
Issue number4
Publication statusPublished - 28 Jan 2002
Externally publishedYes

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