Abstract
The vibrational temperature and vibrational deactivation time of CO molecules in collisions with hydrogen atoms are measured using the broadband version of the coherent anti-Stokes Raman scattering technique (CARS). Carbon monoxide with hydrogen-containing admixtures (H2, H2O) heated in a reflected shock wave up to temperatures 2900–5100 K escaped through a supersonic wedge-shaped nozzle. The measurements demonstrate the high efficiency of hydrogen atoms in the vibrational deactivation of CO. A difference in the measured temperature dependences of the vibrational excitation and deactivation times of CO molecules in collisions with H atoms, which seems to be associated with a difference in the mechanisms of CO-H complex formation, is noted.
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Kozlov, P.V., Makarov, V.N., Pavlov, V.A. et al. Experimental Investigation of Vibrational Deactivation of CO Molecules in a Supersonic Gas Flow. Fluid Dynamics 35, 926–932 (2000). https://doi.org/10.1023/A:1004152911281
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DOI: https://doi.org/10.1023/A:1004152911281