Vibrational relaxation of Davydov components of the 940 cm-1 mode in KClO4 crystal
Anno: 1990
Autori: Bini R., Foggi P., Salvi P.R., Simone R., Schettino V.
Affiliazione autori: Dipartimento di Chimica, Universita\’ di Firenze, 50121 Firenze, Italy
Abstract: We report on the temperature dependent linewidth of the B3u component of gn1 mode in KClO4 crystal measured by FTIR spectroscopy. These results are compared with previous ones obtained for the Ag component. At temperatures higher then 80 K both components have a linear dependence on T showing that three-phonon scattering relaxation processes are driving the decay of this mode. The difference in the residual linewidths at low temperature (20 K) is interpreted in terms of different anharmonic couplings between the two componens and the thermal bath.
Giornale/Rivista: JOURNAL OF MOLECULAR STRUCTURE
Volume: 219 (C) Da Pagina: 43 A: 48
Maggiori informazioni: Consiglio Nazionale delle Ricerche, CNR. College of Natural Resources, University of California Berkeley, CNR, Minister0. Ministry of Primary Industries, MPI. – ACKNOWLEDGMENT This work was supported by the Italian Consiglio Nazionale delle Ricerche (CNR) and Minister0 della Pubblica lstruzione (MPI). The authors wish to thank the mechanical shop staff of the ChemistryD epartmentwho made the projecta nd the realizationo f the N2-purged chamber.Parole chiavi: potassium perchlorateDOI: 10.1016/0022-2860(90)80029-JCitazioni: 7dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2024-04-28Riferimenti tratti da Isi Web of Knowledge: (solo abbonati) Link per visualizzare la scheda su IsiWeb: Clicca quiLink per visualizzare la citazioni su IsiWeb: Clicca qui