Formation of vibrationally excited OH radicals in the O (1D) + H2S reaction

A. A. Iogansen*, O. M. Sarkisov, E. V. Zimont, J. A. Seetula, R. S. Timonen, S. Cheskis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The rate constant, macroscopic branching ratio and vibrational distribution for the reaction O(1D) + H2S→OH + SH were measured. Temporal dependencies of the OH radical concentration in different ro-vibronic states were monitored by the LIF technique after laser flash photolysis of ozone which generated O(1D) atoms. The total rate constant was found to be (2.2±0.5 ) × 10-10 cm-3 molecule-1 s-1. The relative fraction of channel producing OH and SH radicals is 0.26 ± 0.04. The vibrational distribution of OH radicals P({ν}=0): P({ν}= 1) :P ({ν}=2) :P({ν}=3) :P({ν}=4) :P({ν}=5) = 0.19:0.21:0.26:0.2:0.11:0.03 is similar to that for the reaction of O (1D) atoms with H2, CH4 and NH3 which indicates the similar dynamics of these reactions.

Original languageEnglish
Pages (from-to)604-610
Number of pages7
JournalChemical Physics Letters
Volume212
Issue number6
DOIs
StatePublished - 24 Sep 1993

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