Temperature dependence of several vibrational relaxation processes in DF–CO2 mixtures
10.1063/1.1679826
Crossref journal-article
AIP Publishing
The Journal of Chemical Physics (317)
Abstract

A pulsed DF chemical laser has been used to excite DF molecules to their first vibrational level. Decay of the infrared DF fluorescence was used to calculate the vibrational relaxation times of DF due to collisions with itself at temperatures between 468 and 920°K as well as at room temperature. The high temperature data were obtained in a laser-induced fluorescence experiment performed behind a reflected shock wave in a shock tube. The relaxation time of DF(1) due to DF collisions was measured and determined to be 0.063± 0.005μsec · atm at 295°K increasing to 0.36± 0.03μsec· atm at 900°K, which was in agreement with previous shock tube measurements. A measurement of the rate for DF(1)+DF(1)⇄ DF(0)+DF(2) gave a value of kν ν=1.96± 0.2× 1013 cc/mole· sec at 295°K. The rate for the reaction DF(1)+CO2(000)⇄ DF(0)+CO2(001) rate was measured to be 115(μsec· atm−1 at 295°K decreasing to 32± 3(μ sec· atm)−1 at 720°K. Deactivation of CO2(001) by DF was measured to be 8.0± 0.8 (μ sec· atm)−1 at 470°K and 18± 2(μsec· atm)−1 at 295 °K. All of the measured rate coefficients, converted to units of cubic centimeters/mole· second, decreased roughly as T−1 from their values at room temperature.

Bibliography

Bott, J. F., & Cohen, N. (1973). Temperature dependence of several vibrational relaxation processes in DF–CO2 mixtures. The Journal of Chemical Physics, 59(1), 447–452.

Authors 2
  1. J. F. Bott (first)
  2. N. Cohen (additional)
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Dates
Type When
Created 21 years, 6 months ago (Feb. 9, 2004, 4:10 p.m.)
Deposited 1 year, 6 months ago (Feb. 9, 2024, 6:28 a.m.)
Indexed 1 year, 6 months ago (Feb. 10, 2024, 7:23 a.m.)
Issued 52 years, 2 months ago (July 1, 1973)
Published 52 years, 2 months ago (July 1, 1973)
Published Print 52 years, 2 months ago (July 1, 1973)
Funders 0

None

@article{Bott_1973, title={Temperature dependence of several vibrational relaxation processes in DF–CO2 mixtures}, volume={59}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1679826}, DOI={10.1063/1.1679826}, number={1}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Bott, J. F. and Cohen, N.}, year={1973}, month=jul, pages={447–452} }