Croatica Chemica Acta, Vol. 61 No. 3, 1988.
Original scientific paper
Relaxation of Vibrational Excitons in Molecular-Ionic Crystal s Measured by Picosecond Time-Resolved CARS
R. Righini
; Dipartimento di Chimica, Universita di Firenze, 50121 Florence, Italy
L. Angeloni
; Dipartimento di Chimica, Universita di Firenze, 50121 Florence, Italy
E. Castellucci
; Dipartimento di Chimica, Universita di Firenze, 50121 Florence, Italy
P. Foggi
; Dipartimento di Chimica, Universita di Firenze, 50121 Florence, Italy
S. Califano
; Dipartimento di Chimica, Universita di Firenze, 50121 Florence, Italy
D. A. Dows
; Department of Chemistry, University of Southern California, Los Angeles, Ca 90089-0482, USA
Abstract
The decay times of the internal vibrations in K2S04, KCl04, NaN03 and CaC03 single crystals have been measured at different temperature s by picosecond time-resolved CARS. The low temperature experimental data and their temperature dependence are interpreted on the basis of an energy relaxation mechanism, involving two-phonon and higher order decay processes.
Keywords
Hrčak ID:
175952
URI
Publication date:
30.11.1988.
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