Study of hard X-ray characteristics of solar flares - Support for non-thermal processes

Details Study of hard X-ray characteristics of solar flares - Support for non-thermal processes Study of hard X-ray characteristics of solar flares - Support for non-thermal processes

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989soph..119..125n&link_type=abstract

Solar Physics (ISSN 0038-0938), vol. 119, no. 1, 1989, p. 125-142.

Physics

1

Solar Flares, Solar X-Rays, Angular Distribution, Electron Beams, Electron Distribution, Energy Spectra, International Sun Earth Explorer 3, Monte Carlo Method, Spatial Distribution

Scientific paper

The spatial and angular distributions and the energy spectrum of hard X-rays from solar flares have been studied in terms of the energy and angular distributions of the accelerated electron beam. The incident electron distributions as functions of column density have been computed by combining an analytical treatment of small-angle scattering with Monte-Carlo calculations for large-angle scattering. To start with monoenergetic electrons at 0, 30, and 60 deg incidence angles have been taken. Using the Bethe-Heitler total cross section and the Sauter differential cross section, along with the calculated electron distributions, the bremsstrahlung flux and its angular distribution for different photon energies of greater than 10 kev have been studied as a function of column density. The shape of the calculated curves agrees with the observations of PVO/ISEE-3, lending support to the beamed thick-target model for X-ray generation with continuous injection.

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