Abstract
The Gamma Ray Spectrometer on the Solar Maximum Mission (SMM) satellite has observed emissions produced by nuclear reactions in over 20 separate solar flares. The observed intensity from different flares of some of these emissions ranges over a factor of 100 and the time scale for their production ranges from 100 s pulses, to complete events lasting over 1000 s. The emissions include narrow and broadened prompt γ‐ray lines from numerous isotopes from 7Li to 56Fe and cover the energy range 0.431 MeV (7Be) to 7.12 MeV (16O). The instrument has also observed emissions at energies greater than 10 MeV from the decy of π0 mesons, from electrons bremsstrahlung, and from the direct observation of ≳102 MeV solar neutrons. The intensity, temporal and spectral properties of these emissions will be reviewed from the point of view that solar flares represent an astrophysical particle acceleration site.
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