Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...352..353v&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 352, March 20, 1990, p. 353-360.
Astronomy and Astrophysics
Astronomy
7
Gamma Ray Astronomy, Ion Distribution, Solar Flares, Solar Neutrons, Angular Distribution, Capture Effect, Compton Effect, Electromagnetic Scattering, Energy Spectra, Particle Acceleration
Scientific paper
This paper presents a new radiation diagnostic for assaying the energy spectrum and the angular distribution of energetic ions incident on thick hydrogen-rich thermal targets. This diagnostic compares the number of emergent photons in the narrow neutron capture line at 2.223 MeV to the number of Compton scattered photons that form a low-energy tail on the line. It is shown that the relative strength of the tail can be used as a measure of the hardness of the incident ion-energy spectrum. Application of this diagnostic to solar flare conditions is the main thrust of the work presented here. It is examined how the strength of the Compton tail varies with flare viewing angle and the angular distribution of the flare-accelerated particles. Application to compact X-ray binary systems is also briefly discussed.
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