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Note on the aberrations of a fixed‐angle energy‐dispersive powder diffractometer
Author(s) -
Wilson A. J. C.
Publication year - 1973
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889873008526
Subject(s) - extrapolation , diffractometer , diffraction , maxima , optics , photon , powder diffractometer , solid angle , energy (signal processing) , detector , physics , materials science , distribution (mathematics) , computational physics , mathematics , mathematical analysis , scanning electron microscope , art , quantum mechanics , performance art , art history
The geometrical and physical aberrations affecting the positions and breadths of diffraction maxima as determined by the energy distribution of photons diffracted through a fixed angle and analysed by a solid‐state detector differ in many points of detail from those determined by the angular distribution of photons of fixed energy analysed by a conventional diffractometer. The main differences are investigated and the accuracy of spacing measurements is discussed. There is no simple analogue of the extrapolation method of reducing errors in spacing measurements.