Show simple item record

dc.creatorDiestler, D. J.en_US
dc.date.accessioned2006-06-15T13:53:44Z
dc.date.available2006-06-15T13:53:44Z
dc.date.issued1977en_US
dc.identifier1977-FD-4en_US
dc.identifier.urihttp://hdl.handle.net/1811/10003
dc.descriptionAuthor Institution: Department of Chemistry, Purdue Universityen_US
dc.description.abstractA new description of the dynamics of vibrational relaxation of small molecules in condensed phases is proposed. Previous theories view the relaxation as a multiphonon. process, in which a single relatively large quantum of excitation in the intramolecular vibrational mode is lost at once as many small quanta of excitation of the intermolecular (``lattice”) modes. The multiphonon decay rate is calculated via first-order perturbation theory with the assumption that the equilibrium positions of the ``lattice” modes simply shift as the intramolecular mode undergoes a transition. In other words, the coupling of the intramolecular mode to the ``lattice” modes is treated perturbatively. Our new view recognizes that the interaction of the intramolecular mode with certain ``local” modes of the ``lattice” may be quite strong- Hence, the dynamics of the ``complex” formed from the mixing of the intramolecular mode with the relevant ``local” modes is handled exactly and then the coupling of the ``complex” modes to the remaining ``lattice” modes (bath) is described perturbatively. In this view, relaxation takes place in two steps. First, energy flows from the high-frequency intramolecular mode into the low-frequency ``local” modes and then, by single-quantum processes, into the bath. Application of the theory to specific models for diatomic impurities in rare gas matrices is discussed. The results are compared with experiment.en_US
dc.format.extent189098 bytes
dc.format.mimetypeimage/jpeg
dc.language.isoEnglishen_US
dc.publisherOhio State Universityen_US
dc.titleVIBRATIONAL RELAXATION OF SMALL MOLECULES IN DENSE MEDIAen_US
dc.typearticleen_US


Files in this item

Thumbnail

Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.

This item appears in the following Collection(s)

Show simple item record