Laser photolysis of ozone in the presence of ammonia: Vibrationally excited OH radicals

S. G. Cheskis, A. A. Iogansen, P. V. Kulakov, O. M. Sarkisov, A. A. Titov

Research output: Contribution to journalArticlepeer-review

Abstract

Vibrationally excited OH radicals were generated by 266 nm laser photolysis of ozone in the presence of ammonia. Temporal profiles of OH(ν=0, 1, 2) concentrations were directly monitored by LIF techniques at various NH3 pressures. The total vibrational distribution of OH product in the reaction O (1D)+ NH3→NH2+OH was found to be much hotter than the statistical distribution-P(ν=0):P(ν=1):P(ν=2):P(ν=3)=0.20:0.32:0.34:0.14. Vibrational relaxation rate constants of (2.1±0.3)× 10-11, (1.0±0.3)×10-10 and (3.0±1.0)×10-10 cm3/s were measured for collisions of OH(1), OH(2) and OH(3) with NH3.

Original languageEnglish
Pages (from-to)348-352
Number of pages5
JournalChemical Physics Letters
Volume143
Issue number4
DOIs
StatePublished - 22 Jan 1988
Externally publishedYes

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