Energy distribution of energetic O(+) precipitation into the atmosphere

Details Energy distribution of energetic O(+) precipitation into the atmosphere Energy distribution of energetic O(+) precipitation into the atmosphere

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.8619i&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A6, June 1, 1992, p. 8619-8629.

Physics

32

Atmospheric Models, Energy Distribution, Magnetic Storms, Oxygen Ions, Particle Precipitation, Atmospheric Heating, Ion Density (Concentration), Ion Production Rates, Ring Currents, Scattering Cross Sections

Scientific paper

The O(+) transport model by Ishimoto et al. (1986) was revised and used to estimate the thermospheric interaction of precipitating energetic O(+) ions up to 200 keV. The revised model differs from previous models in four ways: (1) its energy range is from 20 eV to 200 keV, instead of from 2 eV to 20 keV; (2) it applies different extrapolations for the estimate of the differential scattering cross sections for large scattering angles; (3) both the elastic and the ionization collisions accompany momentum transfer; and (4) an effective charge-stripping cross section is used to account for the ion flux. The model was used to illustrate the partition of thermospheric heating and ionization with different energy distributions for an energetic O(+) unit flux as a function of incident energy from 0.5 to 200 keV, and to estimate the sensitivity of these calculations to the uncertainties in the cross sections and atmospheric constituent distributions.

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