Physics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983jgr....88.3190t&link_type=abstract
Journal of Geophysical Research, vol. 88, Apr. 1, 1983, p. 3190-3196.
Physics
5
Atmospheric Chemistry, Emission Spectra, Metastable Atoms, Nitrogen Ions, Thermosphere, Twilight Glow, Photochemical Reactions, Photodissociation, Reaction Kinetics, Solar Position
Scientific paper
Measurements of the N(+)((P-3)-(D-1)) emission at 6584 A is used to study the twilight photochemistry of the N(+)(D-) metastable ion. The studies were made at Sutherland, South Africa, in the summer of 1977. From the decay rate of the 6584 A intensity in the evening twilight it could be established that electron quenching is the dominant loss process for these ions. The results are consistent with photodissociative ionization of N2 as the main source. The ratio of the electron quenching rate coefficient to the N(+)(D-1) branching ratio (k(5)/beta(1)) could be determined to be about 10 to the -6th, which suggests that beta (1) = 0.1 if K(5) is about 10 to the -7th cu cm per sec. When the rate coefficients for O and N2 quenching of N(+)(D-1) exceed 5 x 10 to the -12th cu cm per sec and 1 x 10 to the -11th cu cm per sec, respectively, their effect on the emission rate could be detected.
Abdou Wedad A.
Burnside Roger G.
Meriwether W. Jr. J.
Torr Douglas G.
Torr Marsha R.
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