Abstract We present a survey of recent results on the shapes and relative slopes of the spectra of various solar energetic particle populations, with emphasis on the more extensive results currently available for protons, alphas and electrons. From our own work, we find that proton spectra 0.8 to >400 MeV and alpha spectra 1.4 to 80 MeV/nucleon are best characterized, on average, by a functional form involving a Bessel function in momentum/nucleon. However, proton and alpha spectral slopes using this form are not equal, and there is significant variation from event to event. From other studies /1/, electrons 0.02 to 20 MeV are also found to have curved spectra but seem to be better fit with a double power law in energy. The spectral properties in both cases correlate with other measures of solar particle acceleration; e.g. γ-ray line production, hard X-ray burst spectra and μ-wave fluxes.
The energy spectra of solar energetic particles
Advances in Space Research ; 4 , 2-3 ; 117-125
01.01.1984
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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