Observations of Neutrons in Association with the Large Solar Flare of 6 November 1997

Details Observations of Neutrons in Association with the Large Solar Flare of 6 November 1997 Observations of Neutrons in Association with the Large Solar Flare of 6 November 1997

Aug 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001icrc....8.3040t&link_type=abstract

Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the Int

Physics

Scientific paper

Solar neutrons were detected by the Mt. Chacaltaya neutron detector in Bolivia (S E, 5250 m above sea level) in association with solar flares on 1997 November 6th. A clear signal was observed in association with a C4.7 solar flare which occurred at about 10 minutes before the X9.4 large solar flare. Previously, there have been no observation of solar neutrons in association with C class solar flares. Moreover, the signal was detected at early in the morning(7:41 Local Time). Therefore, solar neutrons which arrive at the earth must travel through a thick atmosphere to reach the detector because of large incident angle (?) to the atmosphere. In the thick atmosphere, it has been believed that solar neutrons could not arrive at the detector if we applied the usual attenuation model. However, calculations based on a new attenuation model for solar neutrons in the atmosphere, which takes account of multiple and/or large scattering, gives us a new possibility for us detecting solar neutrons under extreme conditions.

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