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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 O2a → 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.
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V. N. Azyazov, P. A. Mikheyev, M. C. Heaven, "On the O2(a1delta) 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