A study of the vibrational level dependent quenching of CO(v =1-16) by CO2
Abstract
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.
- Publication:
-
Journal of Chemical Physics
- Pub Date:
- December 1979
- DOI:
- 10.1063/1.438242
- Bibcode:
- 1979JChPh..71.4369C
- Keywords:
-
- Carbon Dioxide;
- Carbon Monoxide;
- Electron-Ion Recombination;
- Molecular Relaxation;
- Quenching (Atomic Physics);
- Relaxation Time;
- Vibrational Spectra;
- Fluorescence;
- Fourier Transformation;
- Interferometry;
- Molecular Energy Levels;
- Reaction Kinetics;
- Transition Probabilities;
- Atomic and Molecular Physics;
- 34.50.Ez;
- 82.20.Rp;
- Rotational and vibrational energy transfer;
- State to state energy transfer