Surprisingly Intense Neutron Emission from a Flare Behind the Limb of the Sun
NAVAL RESEARCH LAB WASHINGTON DC E O HULBURT CENTER FOR SPACE RESEARCH
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The Oriented Scintillation Spectrometer Experiment on board the Compton Gamma Ray Observatory observed a strong ux of neutrons from the behind- the-limb are that occurred on 1991 June 1. This is surprising if the neutrons were produced by thin target interactions in the Suns corona as suggested by gamma-ray observations made by GranatPHEBUS of this are. We compare neutron and gamma-ray observations of the June 1 are with thick target emissions observed from a flare three days later where the interactions took place in the chromosphere and photosphere. A very hard spectrum for the accelerated particles is required to account for the number of neutrons observed on June 1 if they were produced by thin-target interactions in the corona.
- Nuclear Physics and Elementary Particle Physics