Auroral electrons and the optical emissions of nitrogen

Details Auroral electrons and the optical emissions of nitrogen Auroral electrons and the optical emissions of nitrogen

Jul 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.2808f&link_type=abstract

Journal of Geophysical Research, vol. 80, July 1, 1975, p. 2808-2812.

Computer Science

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Auroras, Electron Flux Density, Light Emission, Nitrogen, Rocket Sounding, Atmospheric Models, Electron Emission, Electron Energy, Electron Precipitation, Energy Spectra, Ionospheric Sounding, Secondary Emission

Scientific paper

Simultaneous rocket measurements of the auroral electron flux and the optical emissions of N2 give a consistent picture of electron impact excitation in an aurora. The electron data show that the incident auroral electrons are nearly monoenergetic with energy about 25 keV. The overall shape of the observed low-energy electron spectrum is in good agreement with other recent observations and also with recent theoretical models, although there is some disagreement with the models in the value of the power law slope above 20 eV. A discussion of the secondary electron spectrum obtained near apogee shows that a single power law cannot accurately describe the secondary electron spectrum in the energy range from 3 to 85 eV. About 40% of the N2(+) 1NG (0,0) band emission at 3914 A is excited by electrons with energy below 85 eV.

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