nightglow vibrational distributions in the a3σu+ and a'3δu states of o2 derived from astronomical sky spectra

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ID: 145277
2004
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Abstract
Astronomical sky spectra from the Keck I telescope on Mauna Kea have been used to obtain vibrational distributions in the O2A3Σu+) and O2(A'3Δu) states from rotationally-resolved Herzberg I and Chamberlain band emissions in the terrestrial nightglow. The A3Σu+ distribution is similar to that presented in earlier publications, with the exception that there is significant population in the previously undiscerned v=0 level. The vibrational distributions of the A'3Δu and A3Σu+ states are essentially the same when comparison is made in terms of the level energies. The intensity of Chamberlain band emission at the peak of the distribution is about one-fourth that of the Herzberg I emission, as previously shown, and may be related primarily to radiative efficiency. The peaks in both population distributions are about 0.25eV below the O(3P)+O(3P) dissociation limit. We compare these Herzberg state distributions with that of the O2(b1Σg+) state, concurring with others that the intense nightglow emission associated with b1Σg+(v=0) is a reflection of direct transfer from the Herzberg states. This process takes place following O2 collisions, with simultaneous production of very high a1Δg and b1Σg+ vibrational levels.
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slanger2004annalesnightglow Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors T. G. Slanger, P. C. Cosby, D. L. Huestis, A. M. Widhalm
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Journal journal of food measurement and characterization
Year 2004
DOI
10.5194/angeo-22-3305-2004
URL
https://www.ann-geophys.net/22/3305/2004/angeo-22-3305-2004.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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