Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...311..474h&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 311, Dec. 1, 1986, p. 474-484.
Astronomy and Astrophysics
Astronomy
30
Bremsstrahlung, Gamma Ray Astronomy, Solar Flares, Solar Protons, Solar Radiation, Solar X-Rays, Angular Distribution, Continuous Spectra, Power Spectra, X Ray Spectra
Scientific paper
The production rates of hard X-rays and the gamma-ray continuum by protons during solar flares are computed exactly, paying special attention to the Lorentz transformation of the radiation. The maximal quantum of the radiation in proton-electron bremsstrahlung is addressed, and angle and energy differential cross sections of X-rays and gamma rays and the rates of these radiations in the thick-target model are presented. A model is proposed for solar X-rays and gamma-rays. It is found that when an energetic proton interacts with an ambient electron, there is a maximum of energy of the emitted photon in each direction whose highest value is in the direction in which the photon is moving and whose lowest value is on the opposite side. At small angles the maximal energy is greater than the energy of an electron having the same velocity as the proton.
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