Abstract
Since 1972, many solar gamma-ray events are observed. Much advances have been made in the understandings of the solar flare phenomena. A brief description of the gamma-ray observations is given. Several particle acceleration mechanisms that are consistent with these observations are presented. All these mechanisms can work well. But it is difficult at this stage to decide which one is really working at the Sun. There remain many problems for future studies, especially the observations during the next solar maximum.
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Okudaira, K. Particle acceleration as viewed from the observations of flare-associated gamma-ray emissions. Space Sci Rev 51, 117–122 (1989). https://doi.org/10.1007/BF00226270
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DOI: https://doi.org/10.1007/BF00226270