K-alpha fluorescence of iron caused by solar flares

Details K-alpha fluorescence of iron caused by solar flares K-alpha fluorescence of iron caused by solar flares

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979azh....56..399b&link_type=abstract

Astronomicheskii Zhurnal, vol. 56, Mar.-Apr. 1979, p. 399-404. In Russian.

Astronomy and Astrophysics

Astronomy

2

Fluorescence, Iron, Solar Atmosphere, Solar Flares, Solar X-Rays, Molecular Excitation, Photon Beams, Photosphere, Radiative Transfer, Solar Flux Density, Solar Spectra, Ultraviolet Radiation

Scientific paper

A relatively simple expression is obtained for the K-alpha photon flux from weakly ionized iron, which is emitted during reprocessing of hard (energy greater than 7 keV) X-rays from solar flares in dense layers of the solar atmosphere. An exact solution to the radiative-transfer equation is used for this purpose. A detailed comparison is made between the efficiencies of K-alpha fluorescence and electron-impact excitation. Information that may be derived from observations of iron K-alpha emission in the wavelength range from 1.93 to 1.94 A is briefly discussed.

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