Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ssi.....2..105e&link_type=abstract
(Science Research Council, Symposium on the Techniques of Solar and Cosmic X-Ray Spectroscopy, Dorking, Surrey, England, May 22,
Astronomy and Astrophysics
Astronomy
5
Bragg Angle, Calibrating, Crystals, X Ray Astronomy, X Ray Spectroscopy, Electron Beams, Fluorescence, High Resolution, Integral Equations, Reflectance, Single Crystals
Scientific paper
Conditions relevant to the astronomical use of Bragg spectrometers for absolute flux measurements are examined. The universal application, for unpolarized radiation, of the reflection integral as the prime calibration of the crystal efficiency is established irrespective of beam spread or, within certain limits, bandwidth. Several methods of calibration of the reflection integral are given, and typical results are discussed. Comment is made upon the practical difficulty incurred in operation of each method and upon the estimated uncertainty in the results.
Evans K. D.
Leigh B.
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