On the O2(a1delta) quenching by vibrationally excited ozone

V. N. Azyazov; P. A. Mikheyev; M. C. Heaven

doi:10.1117/12.880043

15 November 2010 On the O₂(a¹Δ) quenching by vibrationally excited ozone

V. N. Azyazov, P. A. Mikheyev, M. C. Heaven

Proceedings Volume 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; 77510E (2010) https://doi.org/10.1117/12.880043
Event: 18th International Symposium on Gas Flow and Chemical Lasers and High Power Lasers, 2010, Sofia, Bulgaria

Abstract

The development of a discharge oxygen iodine laser (DOIL) requires efficient production of singlet delta oxygen (O₂(a)) in electric discharge. It is important to understand the mechanisms by which O₂(a) is quenched in these devices. To gain understanding of this mechanisms quenching of O₂(a) in O(³P)/O₂/O₃/CO₂/He/Ar mixtures has been investigated. Oxygen atoms and singlet oxygen molecules were produced by the 248 nm laser photolysis of ozone. The kinetics of O₂(a) quenching were followed by observing the 1268 nm fluorescence of the O₂ a → X transition. Fast quenching of O₂(a) in the presence of oxygen atoms and molecules was observed. The mechanism of the process has been examined using kinetic models, which indicate that quenching by vibrationally excited ozone is the dominant reaction.

Citation Download Citation

V. N. Azyazov, P. A. Mikheyev, and M. C. Heaven "On the O₂(a¹Δ) quenching by vibrationally excited ozone", Proc. SPIE 7751, XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 77510E (15 November 2010); https://doi.org/10.1117/12.880043

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