Diffusion of low energy auroral electrons in the atmosphere

Details Diffusion of low energy auroral electrons in the atmosphere Diffusion of low energy auroral electrons in the atmosphere

Feb 1965

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1965jatp...27..259m&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 27, no. 2, pp. 259-275

Physics

5

Scientific paper

By means of the Monte Carlo method, Spencer's work on the energy dissipation of electrons in air is extended below 25 keV, and the results are applied to the diffusion of monoenergetic electrons in the polar atmosphere. The results show significant effects of straggling, not only on the distribution of the most penetrating flux but also on the height of maximum dissipation and on the back-scattering. The dependence of back-scattering on the angular distributions as well as the energies of incident electrons are calculated, indicating that it decreases rapidly below 10 keV and that a maximum of back-scattering seems to occur at energies around 20 keV, with values of the order of 7 and 20 per cent for vertical and isotropic incidence, respectively for intensity. Corresponding energy back-scattering coefficients (albedos) are approximately half of these values.

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