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Proceedings Paper

Vibrational relaxation in highly excited small polyatomics
Author(s): Anatoliy A. Kosterev; A. A. Makarov; Alexander L. Malinovsky; Evgeny A. Ryabov
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Paper Abstract

Time-resolved Raman probing technique is used to investigate the collisional relaxation of high-laying C-H vibrations in CHF3 and CHF2Cl molecules. The relaxation rates both in collisions with parent molecules and a number of buffer gases were measured. The rate values were found to be abnormally fast. The relaxation is faster than single collision in parent gas and requires a few (3 - 8) collisions for nonpolar gases. For polar gases the relaxation is still faster. The conclusion is made that observed ultrafast relaxation of C-H modes is caused by energy transfer from excited `bright' state to nearby `dark' ones. The theoretical model of this process along with the numerical estimations is presented.

Paper Details

Date Published: 10 June 1996
PDF: 4 pages
Proc. SPIE 2802, Laser Chemistry, Biophysics, and Biomedicine, (10 June 1996); doi: 10.1117/12.242149
Show Author Affiliations
Anatoliy A. Kosterev, Institute of Spectroscopy (Russia)
A. A. Makarov, Institute of Spectroscopy (Russia)
Alexander L. Malinovsky, Institute of Spectroscopy (Russia)
Evgeny A. Ryabov, Institute of Spectroscopy (Russia)

Published in SPIE Proceedings Vol. 2802:
Laser Chemistry, Biophysics, and Biomedicine
Victor N. Zadkov, Editor(s)

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