Physics
Scientific paper
Jan 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82..187n&link_type=abstract
Journal of Geophysical Research, vol. 82, Jan. 1, 1977, p. 187-190.
Physics
1
Auroral Spectroscopy, Electron Precipitation, Ionospheric Composition, Nitrogen, Polar Regions, Vibrational Spectra, Atomic Excitations, Boltzmann Distribution, Electron Energy, Ion Atom Interactions, Mathematical Models, Molecular Oscillations, Reaction Kinetics, Spectral Energy Distribution
Scientific paper
The paper investigates the direct effect of soft electron precipitation on the nitrogen vibrational distribution and on the rate coefficient for the ion-atom interchange reaction between O(+) and N2, using a spectrum of the precipitating electrons characteristic of the dayside cusp region. Substantial increases in the nitrogen vibrational temperature and in the rate of the O(+) destruction reaction do not occur unless the flux of incident electrons is as large as 1 trillion per sq cm/sec. For such large fluxes, departures of the vibrational distribution from a Boltzmann distribution have a significant effect on the rate coefficient. Incident fluxes less than 100 billion per sq cm/sec, such as are usually observed, have little direct effect on nitrogen vibration, although the indirect effect resulting from enhanced electron temperatures might be important.
Mantas George P.
Newton George P.
Walker James C. G.
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