Physics – Atomic Physics
Scientific paper
May 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jqsrt..25..413s&link_type=abstract
Journal of Quantitative Spectroscopy and Radiative Transfer, vol. 25, May 1981, p. 413-417.
Physics
Atomic Physics
5
Chemiluminescence, Nitric Oxide, Nitrogen Atoms, Oxygen Atoms, Reaction Kinetics, Thermosphere, Electron Transitions, Ground State, Quenching (Atomic Physics), Rocket Sounding, Spectral Bands, Spectrum Analysis
Scientific paper
Measurements of the intensities of the delta and gamma bands of nitric oxide in the nighttime terrestrial thermosphere are presented and used to infer the rate coefficient for the transition from the C 2 Pi to the A 2 Sigma + states. The nightglow spectrum was observed between 1900 and 2300 A at a resolution of 15 A by a rocket-borne scanning 1/4-m spectrometer pointing north at an apogee of 150 km. Progressions of the delta, gamma and epsilon bands are identified on the spectra by the construction of synthetic spectra, and the contributions of resonance fluorescence to the total band intensities are calculated. Finally, the ratio of the sum of the gamma bands for v-prime = 0 to the sum of the delta bands for v-prime = 0 is used to derive a branching ratio of 0.21 + or - 0.04 to the A 2 Sigma + state, which yields a probability for the C-A transition of 5.6 + or - 1.5 x to the 6th/sec.
Rusch David W.
Sharp William E.
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