On the O2( a 1Δ) quenching by vibrationally excited ozone

Autor:	P. A. Mikheyev, Michael C. Heaven, Valery N. Azyazov
Rok vydání:	2010
Předmět:	Quenching chemistry.chemical_compound Chemical species Ozone chemistry Singlet oxygen Excited state Molecule chemistry.chemical_element Singlet state Photochemistry Oxygen
Zdroj:	SPIE Proceedings.
ISSN:	0277-786X
DOI:	10.1117/12.880043
Popis:	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.© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Databáze:	OpenAIRE
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