Computer Science
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ssrv...51...85y&link_type=abstract
Space Science Reviews (ISSN 0038-6308), vol. 51, Oct. 1989, p. 85-115.
Computer Science
19
Gamma Rays, Solar Flares, Solar Neutrons, Solar Protons, Solar X-Rays, Compton Effect, Energy Spectra, Particle Acceleration, Photosphere, Proton Energy, Temporal Distribution
Scientific paper
Gamma-ray observations from HINOTORI satellite and possible neutron observations from the Tokyo neutron monitor are reviewed. Time histories of gamma-ray and X-ray emissions for both typical impulsive and gradual flares are discussed in connection with the particle acceleration time. The gamma-ray spectral hardening observed around 400 keV is explained from superimposition of two different electron bremsstrahlung spectra. Proton-energy spectra derived from the gamma-ray observations are compared with the solar energetic particle spectra in interplanetary space. The weak correlation between the gamma-ray fluence and the proton flux is discussed in connection with the particle trapping and escaping in the flare region. The limb darkening of the 2.22 MeV line resulting from neutron-proton capture is interpreted in terms of the attenuation by the Compton scattering in the photosphere. Possible solar neutron events recorded by the Tokyo neutron monitor are presented and the correlation between the gamma-ray fluence and the neutron fluence are described.
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