23 March 2005 Kinetic studies for advanced iodine laser concepts
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Proceedings Volume 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers; (2005); doi: 10.1117/12.611015
Event: XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, 2004, Prague, Czech Republic
Abstract
Recent studies of the iodine dissociation mechanism for COIL systems have prompted new investigations of the energy transfer kinetics of O2(b1Σ+). Additional motivation for these studies, and for investigation of the quenching of I* by O atoms, is derived from efforts to build non-chemical singlet oxygen generators. Discharge generators produce relatively high concentrations of O2(b) and O atoms. Dissociations of I2 by the reagent streams from these generators will follow different kinetic pathways than those that are most important when the flow from a chemical generator is used. To improve our understanding of conventional COIL systems, and gain insights concerning the dissociation kinetics that will be relevant for discharge driven COIL devices we have examined the quenching of O2(b) and O2(a) by I2, and the deactivation of I* by atomic oxygen. The primary findings are: (1) Quenching of O2(b) by I2 is fast (5.8x10-11 cm3 s-1) with a branching fraction of 0.4 for the channel O2(b)+I2→O2(a)+I2. (2) The quantum yield for dissociation of I2 by O2(b) is relatively high (>0.5) and (3) The upper bound for the rate constant for quenching of I* by O atoms is k<2x10-12 cm3 s-1.
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Jiande Han, Anatoly V. Komissarov, Scott P. Tinney, Michael C. Heaven, Steven J. Davis, Seonkyung Lee, "Kinetic studies for advanced iodine laser concepts", Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); doi: 10.1117/12.611015; https://doi.org/10.1117/12.611015
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KEYWORDS
Chemical species

Luminescence

Oxygen

Carbon dioxide

Absorption

Photolysis

Chemical oxygen iodine lasers

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