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High-energy particle production in solar flares (SEP, gamma-ray and neutron emissions)Electrons and ions, over a wide range of energies, are produced in association with solar flares. Solar energetic particles (SEPs), observed in space and near earth, consist of electrons and ions that range in energy from 10 keV to about 100 MeV and from 1 MeV to 20 GeV, respectively. SEPs are directly recorded by charged particle detectors, while X-ray, gamma-ray, and neutron detectors indicate the properties of the accelerated particles (electrons and ions) which have interacted in the solar atmosphere. A major problem of solar physics is to understand the relationship between these two groups of charged particles; in particular whether they are accelerated by the same mechanism. The paper reviews the physics of gamma-rays and neutron production in the solar atmosphere and the method by which properties of the primary charged particles produced in the solar flare can be deduced. Recent observations of energetic photons and neutrons in space and at the earth are used to present a current picture of the properties of impulsively flare accelerated electrons and ions. Some important properties discussed are time scale of production, composition, energy spectra, accelerator geometry. Particular attention is given to energetic particle production in the large flare on June 3, 1982.
Document ID
19880033400
Document Type
Reprint (Version printed in journal)
Authors
Chupp, E. L. (New Hampshire, University Durham, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1987
Publication Information
Publication: Physica Scripta
Volume: T18
ISSN: 0281-1847
Subject Category
SOLAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NASA ORDER S-14513-D
CONTRACT_GRANT: NAG5-720
Distribution Limits
Public
Copyright
Other