Modelling Energy-Dependent Fe/O Ratios Observed above 12 MeV/Nucleon

Details Modelling Energy-Dependent Fe/O Ratios Observed above 12 MeV/Nucleon Modelling Energy-Dependent Fe/O Ratios Observed above 12 MeV/Nucleon

Jul 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003icrc....6.3241c&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

1

Scientific paper

Iron-to-oxygen abundance ratios measured during solar energetic particle (SEP) events are often found to be strongly energy dependent. We suggest that such behavior can be explained by rigidity-dep endent diffusion effects in that the enhancement or depletion of the Fe/O ratio with increasing energy depends on whether loweror higher-rigidity particles are better confined to the shock region. We apply a simple model to 36 large SEP events and find good results for events in which the measured Fe/O ratios are simply increasing or dereasing with energy but not for the many events that have both behaviors.

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