O(1S) from dissociative recombination of O2(+) - Nonthermal line profile measurements from Dynamics Explorer

Details O(1S) from dissociative recombination of O2(+) - Nonthermal line profile measurements from Dynamics Explorer O(1S) from dissociative recombination of O2(+) - Nonthermal line profile measurements from Dynamics Explorer

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....8810163k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 88, Dec. 1, 1983, p. 10163-10169.

Physics

22

Atmospheric Chemistry, F Region, Gas Dissociation, Oxygen Recombination, Spectral Line Width, Dynamics Explorer Satellites, Emission Spectra, Equatorial Atmosphere, Oxygen Spectra

Scientific paper

The measurements reported were made of the O(1S) emission line profile at 5577 A at high spectral resolution with the Fabry-Perot interferometer on the Dynamics Explorer spacecraft. It is found that the line profile has marked nonthermal characteristics in the nightglow. A simple collisional relaxation model is used to analyze the nighttime emission line profiles, measured in the equatorial region. The branching ratio is inferred for the dissociative recombination of O2(+) leading to O(1S). The result reveals that the O(1S) + O(1D) channel is favored over the O(1S). The result reveals that the O(1S) + O(1D) channel is favored over the O(1S) + O(3P) channel by a factor of 4; this does not agree with the ratio reported by Hernandez (1971). It is noted, however, that the result is consistent with the active channel for O(1S) production being via the 1Sigma u + repulsive state of O2, as suggested by the theoretical calculations of Guberman (1983). In addition, a value is obtained for the excitation exchange cross section for O(1S).

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