Physics
Scientific paper
Oct 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aph....12...97l&link_type=abstract
Astroparticle Physics, Volume 12, Issue 1-2, p. 97-105.
Physics
3
Scientific paper
We have compared the intensity-time profiles of the pion-related gamma-ray emission (~70 MeV) and the high-energy interplanetary solar protons in the 1990 May 24 and 1982 June 3 solar flare events. The results of the analysis of these events clearly indicate that the bulk of the interacting and interplanetary high-energy solar protons were not accelerated at the same time and in the same location at or near the Sun. Taking into account the different propagation times, the peak gamma-ray emission in the 1990 May 24 event occurred ~20 min. before the maximum intensity of the high-energy interplanetary protons. In the 1982 June 3 flare event the maximum gamma-ray emission occurred at least 15 min before the intensity maximum of the interplanetary protons. Comparisons of the long-duration pion-related gamma-ray emissions with the >355 MeV solar proton increases near the Earth in the 1991 June 11 and 15 solar flare events are inconclusive because the propagation of the interplanetary solar protons was diffusive.
Debrunner Hermann
Lockwood John A.
Ryan Michael J.
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