A study of the vibrational level dependent quenching of CO( v =1–16) by CO2

The technique of time resolved Fourier spectroscopy has been used to determine rate constants for the processes CO(v)+CO2→CO(v−1)+CO2, where the vibrationally excited CO is created through electron irradiation of Ar/CO2 mixtures. The CO production mechanism, predominantly dissociative recombination...

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Bibliographic Details
Published in:The Journal of chemical physics 1979-01, Vol.71 (11), p.4369-4379
Main Authors: Caledonia, George E., Green, Byron David, Murphy, Randall E.
Format: Article
Language:English
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Summary:The technique of time resolved Fourier spectroscopy has been used to determine rate constants for the processes CO(v)+CO2→CO(v−1)+CO2, where the vibrationally excited CO is created through electron irradiation of Ar/CO2 mixtures. The CO production mechanism, predominantly dissociative recombination of CO2+, is found to produce CO excited to as much as v=19. The CO(v) deactivation rate constants are deduced from examination of the time histories of the vibrational population distribution. From a Stern–Volmer analysis, the residual quenching not due to CO2 is attributed entirely to CO(v=0) relaxation of CO(v) and radiative decay. Experimentally determined upper bounds for the CO(Δv=1) transition probabilities for spontaneous emission have been obtained for levels 7–12.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.438242