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30 December 1981 Kinetics Of A Continuous Wave (CW) Infrared Laser Induced Reaction
R. N. Zitter, D. F. Koster, A. Cantoni, A. Ringwelski
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Proceedings Volume 0288, Los Alamos Conf on Optics '81; (1981) https://doi.org/10.1117/12.932045
Event: Los Alamos Conference on Optics, 1981, Los Alamos, United States
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.
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R. N. Zitter, D. F. Koster, A. Cantoni, and A. Ringwelski "Kinetics Of A Continuous Wave (CW) Infrared Laser Induced Reaction", Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); https://doi.org/10.1117/12.932045
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KEYWORDS
Temperature metrology
Continuous wave operation
Data modeling
Absorption
Interferometry
Interferometers
Carbon dioxide lasers
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