Computer Science
Scientific paper
Oct 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976natur.263..488k&link_type=abstract
Nature, vol. 263, Oct. 7, 1976, p. 488-490.
Computer Science
15
Atmospheric Chemistry, Reaction Kinetics, Sodium Vapor, Upper Atmosphere, Atmospheric Ionization, Chemical Reactions, Chemiluminescence, D Lines, Electron States, Oxygen, Reaction Time
Scientific paper
More reasonable rate constants are estimated for the chemical reactions which involve atomic sodium and atmospheric oxygen species and which are responsible for upper-atmospheric chemiluminescence. The sodium-oxygen atmospheric reaction sequence is outlined, and reactive cross sections as well as rate constants for an ambient temperature of 185 K are calculated for reactions between Na and O3, NaO and O, and NaO and O3. The rate constants for the first two reactions are found to be significantly larger than the analogous ones for hydrogen or nitrogen species used in previous modeling efforts. To demonstrate the impact that these rate constants can have on an atmospheric modeling problem, an upper limit is computed for Na D-line emissions at 85 and 90 km from a 30-g meteoroid with a velocity of 40 km/s. It is noted that the present rate constants indicate that sodium is an extremely efficient catalytic destroyer of odd oxygen at the atmospheric altitudes considered.
Elgin James B.
Kolb Charles E.
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