Physics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004georl..3119106y&link_type=abstract
Geophysical Research Letters, Volume 31, Issue 19, CiteID L19106
Physics
2
Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Constituent Sources And Sinks, Atmospheric Composition And Structure: Middle Atmosphere-Constituent Transport And Chemistry (3334)
Scientific paper
Recent experiments have shown that in the oxygen isotopic exchange reaction for O(1D) + CO2 the elastic channel is approximately 50% that of the inelastic channel [Perri et al., 2003]. We propose an analogous oxygen atom exchange reaction for the isoelectronic O(1D) + N2O system to explain the mass-independent isotopic fractionation (MIF) in atmospheric N2O. We apply quantum chemical methods to compute the energetics of the potential energy surfaces on which the O(1D) + N2O reaction occurs. Preliminary modeling results indicate that oxygen isotopic exchange via O(1D) + N2O can account for the MIF oxygen anomaly if the oxygen atom isotopic exchange rate is 30-50% that of the total rate for the reactive channels.
Blake Geoffrey A.
Liang Mao-Chang
Miller Charles E.
Muller Richard P.
Yung Yuk L.
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