LASER PHOTOLYSIS OF THE N$_2$O/I$_2$/CO$_2$/Ar MIXTURES AT 193 NM
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Date
2006
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Publisher
Ohio State University
Abstract
Oxygen-iodine lasers that utilize electrical discharges to produce O$_2$(a$^1\Delta_g$) are currently being developed. The discharge generators differ from those used in conventional chemical oxygen iodine lasers in that they produce significant amounts of atomic oxygen. The post-discharge chemistry includes channels that are both beneficial and detrimental to the laser. The beneficial reactions result in the dissociation of I$_2$ while the detrimental processes cause direct and indirect removal of I($^2$P$_{1/2}$) (the upper level of the laser). We have examined kinetic processes relevant to the laser through studies of photo-initiated reactions in N$_2$O/I$_2$ mixtures. The reactions have been monitored using absorption spectroscopy, LIF, and time-resolved emission spectroscopy. A kinetic model has been developed from these data, and the rate constants for the deactivation of I($^2$P$_{1/2}$) by O($^3$P) (k = 1.2 x 10$^{-11}$ cm$^{3}$ s$^{-1}$) has been determined for the first time.
Description
Author Institution: Department of Chemistry, Emory University, Atlanta, GA 30322