Gamma-ray lines and neutrons from solar flares

✍ Scribed by R. Ramaty; R. J. Murphy; B. Kozlovsky; R. E. Lingenfelter

• Publisher: Springer
• Year: 1983
• Tongue: English
• Weight: 759 KB
• Volume: 86
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00157213

✦ Synopsis

We have derived the energy spectrum of accelerated protons and nuclei at the site of the June 21, 1980 limb flare by a new technique, using observations of the time-dependent flux of highenergy neutrons at the Earth. We find that this energy spectrum is very similar to the energy spectra of 7 disk flares for which the accelerated particle spectra havebeen previously derived using observations of 4-7MeV-to-2.223 MeV fluence ratios. The implied spectra for all of these flares are too steep (sT : 0.02) to produce any significant ~mount of radiation from ~ meson decay. We suggest that the observed >10 MeV gamma rays from the June 21, 1980 flare are bremsstrahlung of relativistic electrons.