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Vibrational dephasing and resonance energy transfer in molecular liquids

โœ Scribed by Reiner Wertheimer


Publisher
Elsevier Science
Year
1977
Tongue
English
Weight
367 KB
Volume
52
Category
Article
ISSN
0009-2614

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๐Ÿ“œ SIMILAR VOLUMES


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A model based on :iemiclassical collision theory is presented to describe the dephasing of vibrationally excited molecules in a Iiquid. It is sholvn that fluctuations of the vibrational frequencies, which are uuzed by the intermolecular interaction, lead to phase rc:laxation of 3 coherently excited

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possibk RSSOIIS for the non-monotonous tempa-aturs dependencf oE the q~~~d-rescmzm~~ emcrgy trmsf'er probability and relative contributions of short-range and long-range forces are discussed. Particular calcuhtions are made for the caze Nz-C02(v3) vibrational energy exchange.

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We show that, in vibrational rehxation experiments. the excitation process prepares a11 the molecules in a coherent, or Gkwber, stnte-We then cafcukae the dephasinz rate due to resonant energy transfer. We also gibe another demonstration of relationships betseen the different rehlation times in simp

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Transfer of one quantum of vibrational excitation from a CO molecule initizlly in vibrational Iwel 1G to another CO mofecul~ inSalty in its ground vibrational level, a process endothermic by about 236 cm -I, is explained by a second-order distortrd-tive Born calculation. The distortion potent&l is r