Interferometric studies of the twilight and nightglow sodium D-line profiles

Details Interferometric studies of the twilight and nightglow sodium D-line profiles Interferometric studies of the twilight and nightglow sodium D-line profiles

Jan 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978p%26ss...26...65s&link_type=abstract

Planetary and Space Science, vol. 26, Jan. 1978, p. 65-73.

Physics

5

D Lines, Midlatitude Atmosphere, Nightglow, Twilight Glow, Atmospheric Models, Fabry-Perot Interferometers, Reaction Kinetics, Sodium, Spectral Line Width

Scientific paper

The Chapman NaO plus O chemiexcitation process is held responsible for mid-latitude Na nightglow. Sodium D-line profiles obtained from a pressure scanned Fabry-Perot interferometer indicate that Na layer temperatures reach mid-winter highs (approximately 250 K) and mid-summer lows (approximately 150 K). Behavior of the nightglow is variable, both rising and falling, and near-constant in intensity. A dissociation kinetic energy of 46 plus or minus 4 meV is obtained by broadening the D-line profiles. This observation is in good agreement with the chemiexcitation (rather than the dissociative recombination) hypothesis for the nightglow phenomenon.

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