Abstract
The effects of collisional quenching on photofragment emission (PFE) detection of vapor-phase in combustion flue gas constituents are investigated. Exciting via the transition, time-resolved measurements of emission from the daughter in buffer-gas mixtures of , , and indicate that the fragmentation pathway passes through a long-lived intermediate species, which we assign to . Total quenching rate coefficients of by , , and are consistent with values reported in the literature. In addition, total quenching rate coefficients for the intermediate state are determined to be and for and , respectively. An analysis of the impact of the collisionally dependent energy-transfer process that precedes the formation of on the use of PFE to measure concentration is presented.
© 2008 Optical Society of America
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