N2(B3Πg) and N2+(A2Πu) vibrational distributions observed in sprites

Details N2(B3Πg) and N2+(A2Πu) vibrational distributions observed in sprites N2(B3Πg) and N2+(A2Πu) vibrational distributions observed in sprites

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jastp..65..583b&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 65, Issue 5, p. 583-590.

Physics

29

Scientific paper

A pair of spectra taken simultaneously by two different ground-based instruments has been analyzed by our group. As with previous observations, the spectra are composed primarily of the N2 first positive group (1PG) (B3Πg-A3Σu+). In a previous study, we compared the N2(B) vibrational distributions from the spectral analysis with those resulting from a time-dependent kinetic model of N2 triplet excited state populations. Both spectra reflect emission between 50 and 60km. The higher-altitude spectrum is primarily 1PG but also shows the presence of features which appear to be N2+ Meinel (A2Πu-X2Σg+). The lower-altitude spectrum shows little or none of the apparent Meinel emission but has an N2(B) vibrational distribution similar to ones observed in laboratory afterglows. In this paper we discuss the apparent presence of the Meinel emission and present the observed N2(B) vibrational distributions.

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