Physics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990georl..17.1287s&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 17, Aug. 1990, p. 1287-1290.
Physics
6
Atmospheric Chemistry, Computerized Simulation, Isotopic Labeling, Laser Spectroscopy, Ozone Depletion, Reaction Kinetics, Antarctic Regions, Chlorine Oxides, Magnetic Spectroscopy, Oxygen, Ozone
Scientific paper
Upper limits for the bimolecular rate constant for the reaction ClO + O3 yields ClOO + O2 have been measured directly between 233 and 413 K using a discharge-flow system at 1-2 torr total pressure. Production of ClO (which occurs quickly after thermal decomposition of ClOO in the presence of O3) was detected using Laser Magnetic Resonance spectroscopy, and distinguished from the reactant ClO through isotopic oxygen labelling. At 298 and 233 K, k1 was found to be less than 1.4 x 10 to the -17th cu cm/molecule s. At 413 K, ki = (4.0 + or - 2.0) x 10 to the -16th cu cm/molecule s. The experimental conditions were modeled using a kinetic simulation program to show that chemical and isotopic scrambling interferences were negligible. From these results, it is concluded that this bimolecular reaction does not contribute significantly to the observed ozone depletion within the antarctic vortex.
Anderson James G.
Stevens Philip S.
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