Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.207...83r&link_type=abstract
In ESA Plasma Astrophys. p 83-90 (SEE N85-22270 12-90)
Astronomy and Astrophysics
Astrophysics
Circumsolar Radiation, Gamma Rays, Neutron Emission, Particle Acceleration, Solar Flares, Solar Neutrons, Atmospheric Effects, Bessel Functions, Shock Heating, Solar Atmosphere, Stochastic Processes
Scientific paper
The production of neutrons, 4 to 7 MeW nuclear gamma rays, positrons and pions resulting from the interaction of flare accelerated particles with the solar atmosphere was calculated. For the energy spectra of these particles the Bessel function predicted by stochastic acceleration and power laws which could result from acceleration at large-scale planar shocks was used, with the thick-target model. It is assumed that in the interaction region the accelerated particles are isotropic. The neutron-to-2.223 MeV photon conversion factors for various flare locations on the Sun are derived by averaging conversion factors over these spectra. Comparing calculations with data confirms that for most gamma-ray flares the bulk of the accelerated particles remain trapped at the Sun and that these particles have spectra similar to the spectra of flare particles observed in interplanetary space.
Murphy Ronald J.
Ramaty Reuven
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