Inference of 'bumps' in electron energy spectra from high resolution X-ray bremsstrahlung spectra

Details Inference of 'bumps' in electron energy spectra from high resolution X-ray bremsstrahlung spectra Inference of 'bumps' in electron energy spectra from high resolution X-ray bremsstrahlung spectra

Feb 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...242l..13b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 242, no. 2, Feb. 1991, p. L13-L16. Research supported by EEC and SERC.

Astronomy and Astrophysics

Astrophysics

6

Bremsstrahlung, Electron Energy, Electron Plasma, Energy Spectra, Solar Flares, X Ray Spectra, Distribution Functions, High Resolution, Solar X-Rays, Velocity Distribution

Scientific paper

Regions of positive slope in an electron speed distribution function fs(v) are shown to result in sharp downward 'knees' (spectral index increases) in the emitted bremsstrahlung spectra. For Kramers' cross-section, a criterion is established for the detectability of such a 'bump' in the source electron spectrum from the photon spectrum, realizable from state of the art X-ray spectrometry, and applying a fortiori for more exact cross-sections. Inference of bumps in the thick target injection spectrum, however, demands spectral resolution far beyond present capabilities. Physical implications of bumps in fs(v) are discussed.

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