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Equilibration of OH (v7; v9) in air-like gas ensembles
The reaction H + O(3) -> OH + O(2) yields OH in v(OH) = 7-9. We report equilibration of OH v(OH) = 7 and v(OH) = 9 in baths of N(2) + O(2) in v = 0 at 300 K. Each relaxes initially by near-resonant, coupled, vibrational energy exchange with bath gas molecules, followed by further, slower, phases of energy transfer. Single (first) collision cross-sections are calculated to be 1.42; 1.51; 1.52 +/- 0.21 angstrom(2) for depopulation of v(OH) = 7; 8; 9 respectively. 'Equilibrated' OH rotation becomes the lowest of all nine possible modal temperatures in OH and the two bath gases, despite an initial sharp rise.
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Publication status
- Published
Journal
Chemical Physics LettersISSN
00092614Publisher
ElsevierExternal DOI
Issue
4-6Volume
515Page range
302-305Department affiliated with
- Chemistry Publications
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- No
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- Yes
Legacy Posted Date
2012-02-06Usage metrics
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