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Role of vibrational dynamics in resonant positron annihilation on molecules


, : Role of vibrational dynamics in resonant positron annihilation on molecules. Physical Review Letters 110(22): 223201-223201

Vibrational Feshbach resonances are dominant features of positron annihilation for incident positron energies in the range of the molecular vibrations. Studies in relatively small molecules are described that elucidate the role of intramolecular vibrational energy redistribution into near-resonant multimode states, and the subsequent coupling of these modes to the positron continuum, in suppressing or enhancing these resonances. The implications for annihilation in other molecular species, and the necessary ingredients of a more complete theory of resonant positron annihilation, are discussed.

US$19.90

PMID: 23767720

DOI: 10.1103/PhysRevLett.110.223201


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