Energetic O/+/ precipitation

Details Energetic O/+/ precipitation Energetic O/+/ precipitation

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.2481k&link_type=abstract

Journal of Geophysical Research, vol. 87, Apr. 1, 1982, p. 2481-2486.

Physics

31

Atmospheric Heating, Energetic Particles, F Region, Mathematical Models, Oxygen Ions, Particle Precipitation, Oxygen Atoms, Scattering Cross Sections, Temperature Distribution, Thermosphere

Scientific paper

Fluxes of energetic O(+) ions are often observed precipitating into the atmosphere and are possibly a significant energy source for the ionosphere and thermosphere. Models of these events indicate that most of the energy of such an O(+) beam is deposited as neutral heat at F region heights and a significant escape flux of O atoms results. The distribution of this heating with altitude, however, has a major effect on the type and significance of the aeronomical consequences that it can initiate. The particulars of this distribution are very sensitive to the cross sections and scattering parameters used in the modeling. A comparison of hard sphere and classical elastic parameters indicates that using the latter, more realistic formulation not only results in a more penetrating beam but reduces the escape flux by as much as a factor of 2 over the hard sphere treatment.

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