Prolonged Release of 100 MeV Solar Protons in the GLE Events of 1997-2002

Details Prolonged Release of 100 MeV Solar Protons in the GLE Events of 1997-2002 Prolonged Release of 100 MeV Solar Protons in the GLE Events of 1997-2002

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3317s&link_type=abstract

Proceedings of the 28th International Cosmic Ray Conference. July 31-August 7, 2003. Trukuba, Japan. Under the auspices of the I

Physics

Scientific paper

The solar proton events of 1991 June 11 and 15 provide evidence that > 100 MeV protons interacting in the solar atmosphere and escaping into the interplanetary space are from the same population. Events of 1997-2002 accompanied by ground level enhancements are considered. The model of diffusion propagation assuming prolonged and multiple release of solar protons fits quite well proton intensity measured within 84-200 MeV energy band. The number of protons in the solar source is estimated for different time moments by using the propagation model. The obtained numbers of interacting protons suggest that the relevant instrument should observe prolonged γ -emission with a significant contribution from π 0 -decay in many of the considered events. Apparently a notation of local radiation belts of the Sun should be intro duced.

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