Possible evidence for >= 10 GeV neutrons associated with the solar flare of 4 June 1991

Details Possible evidence for >= 10 GeV neutrons associated with the solar flare of 4 June 1991 Possible evidence for >= 10 GeV neutrons associated with the solar flare of 4 June 1991

Nov 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992aph.....1...27c&link_type=abstract

Astroparticle Physics, Volume 1, Issue 1, p. 27-32.

Physics

12

Scientific paper

Neutrons associated with the solar flare of 4 June 1991 were observed by scintillation detectors of the Akeno Giant Air Shower Array (AGASA), which is about 900 m above sea level (920 g/cm2). The total area of plastic scintillators used for the present analysis is 182.6 m2 and the excess counting rate is (0.35 +/- 0.1) per m2s. From attenuation of counting rates observed by scintillation detectors at Mt. Norikura and at Akeno, the excess signals can be interpreted as muons produced in the upper atmosphere by solar neutrons of energies above 10 GeV. The flux of solar neutrons above 10 GeV is about 1 ~ 2 per m2s at the top of the atmosphere and lasted for more than 20 minutes after the solar flare.

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