Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981soph...69..147c&link_type=abstract
Solar Physics, vol. 69, Jan. 1981, p. 147-159. Centre National d'Etudes Spatiales
Astronomy and Astrophysics
Astronomy
7
Gamma Ray Astronomy, Line Spectra, Solar Flares, Solar Radiation, Solar X-Rays, Emission Spectra, Prognoz Satellites, Solar Spectra, X Ray Sources
Scientific paper
The November 22, 1977 solar flare was observed at energies up to 4.9 MeV by French-built gamma ray detectors aboard the Prognoz-6 satellite. The data show evidence for 2.23 and 4.43 MeV line emission, with the 2.23 MeV emission occurring about 3 min after the flare onset in hard X-rays. The line intensities, 0.11/sq cm-s and 0.06/sq cm-s for the 2.23 and 4.43 lines, respectively, are roughly comparable to intensities observed in other events. Particle detectors aboard the Prognoz-6 satellite, however, recorded a proton flux much lower than that observed for the August 4, 1972 event. It is shown that this may be taken as evidence for a thick target interpretation of the proton interactions in the solar atmosphere.
Chambon Guillaume
Estulin I. V.
Hurley Kevein
Likin O. B.
Niel Michel
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