Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 10, Issue 29, Pages 4313-4321Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b804553d
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The recombination reaction H + O-2 (+ M)-HO2 (+ M) was studied by laser. ash photolysis in a high pressure flow cell, over the temperature range 300-900 K, the pressure range 1.5-950 bar and in the bath gases M = He and N-2. Earlier experiments by Hahn et al. ( Phys. Chem. Chem. Phys. 2004, 6, 1997) in the bath gas M = Ar were also extended. The data were analyzed in terms of unimolecular rate theory employing new calculations of relevant molecular parameters. Improved energy transfer parameters for the bath gases M = He, Ar, N-2, and H2O could thus be obtained and complete fallo. curves were constructed. In the case of water, the high pressure rates well connect with pulse radiolysis results obtained in supercritical water by Janik et al.
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