Laser flash photolysis studies of atmospheric free radical chemistry using optical diagnostic techniquesSome recent studies carried out in our laboratory are described where laser flash photolytic production of reactant free radicals has been combined with reactant and/or product detection using time-resolved optical techniques to investigate the kinetics and mechanisms of important atmospheric chemical reactions. Discussed are (1) a study of the radical-radical reaction O + BrO yields Br + O2 where two photolysis lasers are employed to prepare the reaction mixture and where the reactants O and BrO are monitored simultaneously using atomic resonance fluorescence to detect O and multipass UV absorption to detect BrO; (2) a study of the reaction of atomic chlorine with dimethylsulfide (CH3SCH3) where atomic resonance fluorescence detection of Cl is employed to elucidate the kinetics and tunable diode laser absorption spectroscopy is employed to investigate the HCl product yield; and (3) a study of the aqueous phase chemistry of Cl2(-) radicals where longpath UV absorption spectroscopy is employed to investigate the kinetics of the Cl2(-) + H2O reaction.
Document ID
19930067505
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Wine, Paul H. (NASA Headquarters Washington, DC United States)
Nicovich, J. M. (NASA Headquarters Washington, DC United States)
Hynes, Anthony J. (NASA Headquarters Washington, DC United States)
Stickel, Robert E. (NASA Headquarters Washington, DC United States)
Thorn, R. P. (NASA Headquarters Washington, DC United States)
Chin, Mian (NASA Headquarters Washington, DC United States)
Cronkhite, Jeffrey A. (NASA Headquarters Washington, DC United States)
Shackelford, Christie J. (NASA Headquarters Washington, DC United States)
Zhao, Zhizhong (NASA Headquarters Washington, DC United States)
Daykin, Edward P. (Georgia Inst. of Technology Atlanta, United States)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: In: Optical methods in atmospheric chemistry; Proceedings of the Meeting, Berlin, Germany, June 22-24, 1992 (A93-51501 22-35)
Publisher: Society of Photo-Optical Instrumentation Engineers