Abstract
We present an analysis of the temporal and spectral characteristics of high-energy (E>30 MeV) gamma-ray emission from solar flares in the 22nd solar-activity cycle obtained in the Gamma-1 experiment. The powerful flares of March 26, June 15, and October 27, 1991, are examined, as well as the weaker events of October 29 and December 8, 1991. Two emission phases are revealed in these flares: an active phase with individual, short bursts of radiation and a slow phase without such bursts. A qualitative scenario for the development of a solar gamma-ray flare is presented, based on the common temporal and spectral features of the observed flares and of simulation results.
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