On the exponential decay of western hemisphere solar particle events

Details On the exponential decay of western hemisphere solar particle events On the exponential decay of western hemisphere solar particle events

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25.1081s&link_type=abstract

Planetary and Space Science, vol. 25, Nov. 1977, p. 1081-1084.

Physics

3

Fokker-Planck Equation, Radioactive Decay, Solar Flares, Solar Protons, Mathematical Models, Proton Flux Density, Solar Corpuscular Radiation, Solar Physics, Solar Wind

Scientific paper

The Fokker-Planck equation governing solar proton transport is solved numerically in three dimensions (time, radial distance, energy), assuming a power-law dependence of the diffusion coefficient on both radial distance and energy. The results obtained are used to re-examine the decay of a solar flare particle event. It is shown that the exponential decay of the event considered can be modeled very well by a numerical solution to the full Fokker-Planck equation with delta-function-type (instantaneous) injection and an outer free-escape boundary at 10 AU.

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