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Proceedings Paper

Kinetic studies for advanced iodine laser concepts
Author(s): Jiande Han; Anatoly V. Komissarov; Scott P. Tinney; Michael C. Heaven; Steven J. Davis; Seonkyung Lee
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Paper 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.

Paper Details

Date Published: 23 March 2005
PDF: 9 pages
Proc. SPIE 5777, XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers, (23 March 2005); doi: 10.1117/12.611015
Show Author Affiliations
Jiande Han, Emory Univ. (United States)
Anatoly V. Komissarov, Emory Univ. (United States)
Scott P. Tinney, Emory Univ. (United States)
Michael C. Heaven, Emory Univ. (United States)
Steven J. Davis, Physical Sciences Inc. (United States)
Seonkyung Lee, Physical Sciences Inc. (United States)

Published in SPIE Proceedings Vol. 5777:
XV International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
Jarmila Kodymova, Editor(s)

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