Abstract
The viability of pulsed laser photofragment emission (PFE) is evaluated for the in situ measurement of vapor-phase mercuric chloride concentration in combustion flue gas. Dispersed emissions from both the and photoproducts are presented, and the dependence of the PFE signal originating from on the collisional environment is examined for buffer-gas mixtures of , , and . Integrated PFE intensity measurements as a function of buffer gas pressure support the assumption that the primary effect of the relevant flue gas constituents is to quench emission from . The quenching rate constants for PFE from were measured to be for , for , and for . These values are in good accord with literature values for the quenching of . The emission cross section for generated by photodissociation of in is found to be by comparing the PFE signal to Raman scattering.
© 2006 Optical Society of America
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