ISSN:
1600-5724
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
The resolution function of a three-axis, X-ray spectrometer is considered for the case when the monochromator and analyser crystals are ideally perfect. It is shown that, for X-ray sources which produce either an ill-collimated monochromatic beam (conventional source) or a well-collimated white beam (synchrotron radiation), the resolution problem may be simplified. This simplification allows the profile of an arbitrary section of the resolution function to be expressed as a one-dimensional integral of the product of three functions; one to represent the source characteristics and the other two to describe the Darwin profiles of the monochromator and analyser crystals. The formalism is extended to describe the measurement of the resolution function by a perfect crystal mounted on the sample table of the spectrometer. Comparison of the a priori calculations with measurements made on a spectrometer at a conventional source yields very good agreement.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108767383000070
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