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Proceedings Paper

Kinetics Of A Continuous Wave (CW) Infrared Laser Induced Reaction
Author(s): R. N. Zitter; D. F. Koster; A. Cantoni; A. Ringwelski
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Paper Abstract

Kinetics of the unimolecular decomposition of CH3CF2Cl induced by a CW CO2 laser has been investigated at pressures of 10 to 200 torr and beam intensities of 150 to 1000 W/cm2. Laser induced rate constants k and translational temperatures T have been obtained through several recently developed procedures which include interferometric measurements of T. While in the high pressure limit the laser induced rate constant k is found to be nearly identical to the thermal rate constant kt, we observe that k becomes progressively larger than kt at any T with decreasing pressure, reaching the value of 103 kt at 10 torr. We conclude that the effective vibrational temperature Tv exceeds T as a result of the competition between the rates of photon absorption and deactivation by vibrational-to-translational relaxation. The experiment also reveals some anomalous features of VT transfer at the lower pressures.

Paper Details

Date Published: 30 December 1981
PDF: 6 pages
Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); doi: 10.1117/12.932045
Show Author Affiliations
R. N. Zitter, Southern Illinois University (United States)
D. F. Koster, Southern Illinois University (United States)
A. Cantoni, Southern Illinois University (United States)
A. Ringwelski, Southern Illinois University (United States)

Published in SPIE Proceedings Vol. 0288:
Los Alamos Conf on Optics '81
Donald H. Liebenberg, Editor(s)

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