Physics – Chemical Physics
Scientific paper
Aug 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jchph..87.2112s&link_type=abstract
Journal of Chemical Physics (ISSN 0021-9606), vol. 87, Aug. 15, 1987, p. 2112-2115. NASA-supported research.
Physics
Chemical Physics
Aeronomy, Chemiluminescence, Oxygen Atoms, Phosphines, Planetary Atmospheres, Reaction Kinetics, Atmospheric Chemistry, Jupiter Atmosphere, Photolysis, Saturn Atmosphere
Scientific paper
The rate constant for the reaction of atomic oxygen with phosphine has been measured at 298 K using flash photolysis combined with time-resolved detection of O(3P) via resonance fluorescence. Atomic oxygen was produced by flash photolysis of N2O or NO highly diluted in argon. The results were shown to be independent of (PH3), (O), total pressure and the source of O(3P). The mean value of all the experiments is k1 = (3.6 + or -0.8) x 10 to the -11th cu cm/s (1 sigma). Two previous measurements of k1 differed by more than an order of magnitude, and the results support the higher value obtained in a discharge flow-mass spectrometry study. A comparison with rate data for other atomic and free radical reactions with phosphine is presented, and the role of these reactions in the aeronomy or photochemistry of Jupiter and Saturn is briefly considered.
Nava David F.
Payne Walter A.
Stief Louis J.
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