Investigation of the Solar Neutron Event at Tsumeb on 28 October 2003

Details Investigation of the Solar Neutron Event at Tsumeb on 28 October 2003 Investigation of the Solar Neutron Event at Tsumeb on 28 October 2003

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsh13a1136c&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SH13A-1136

Other

7513 Coronal Mass Ejections, 7514 Energetic Particles (2114), 7519 Flares, 7524 Magnetic Fields, 7837 Neutral Particles

Scientific paper

During the 28 October 2003 solar energetic particle event, the high rigidity cutoff (low latitude) neutron monitor located at Tsumeb in Namibia recorded a flux increase of 3-4 percent roughly 10 minutes before the onset of a Ground Level Event (GLE) observed by many low rigidity cutoff (high latitude) neutron monitors. An analysis of the properties of this neutron event is presented, based on direct neutrons produced in the lower solar atmosphere by hadronic interactions. After deriving the yield function for neutrons at Tsumeb and using a typical spectrum for solar neutrons, we determine the start time and emission duration, which are compared with other observations. This work is supported by NSF grant ATM-0000315, the Rachadapisek Sompoj Fund of Chulalongkorn University, and the Thailand Research Fund.

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