Recombination of O2/+/ in the ionosphere

Details Recombination of O2/+/ in the ionosphere Recombination of O2/+/ in the ionosphere

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976jgr....81.5578t&link_type=abstract

Journal of Geophysical Research, vol. 81, Nov. 1, 1976, p. 5578-5580.

Physics

6

Ionospheric Composition, Molecular Ions, Oxygen Ions, Reaction Kinetics, Recombination Reactions, Atmospheric Chemistry, Electron Energy, Ionic Reactions, Ionospheric Ion Density, Molecular Excitation, Molecular Oscillations, Photochemical Reactions, Radiative Lifetime

Scientific paper

In spite of the excellent agreement between various laboratory measurements of the recombination rate of O2(+) with electrons, it is still questionable whether the laboratory results apply in the ionosphere, because although the radiative lifetime of vibrating O2(+) is not well known, indications are that it may be very long. Whether the laboratory results apply in the atmosphere depends on whether the recombination rate is dependent on the vibrational state of the O2(+) ion and on whether the ions are deactivated (or not) in both the laboratory experiments and the atmosphere prior to recombination. To obtain reliable answers to these questions, the present study was carried out to determine the recombination of O2(+) in the ionosphere from in situ measurements of the relevant temperatures and densities made by the open source mass spectrometer carried by the AE-C satellite. The photochemistry involved is discussed. The results show that the ionospheric determination of the recombination rate of O2(+) with electrons agrees with the laboratory measurements of Walls and Dunn (1974) for electron temperatures between 1200 and 2000 K.

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