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Notes on Slits and Monochromators in Accurate Powder Diffractometry

Published online by Cambridge University Press:  10 January 2013

J. Timmers ,
N.M. van der Pers ,
G.J.M. Sprong ,
Th.H. de Keijser  and
R. Delhez
J. Timmers
Affiliation:
Faculty of Applied Physics, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
N.M. van der Pers
Affiliation:
Laboratory of Materials Science, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands
G.J.M. Sprong
Affiliation:
Laboratory of Materials Science, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands
Th.H. de Keijser
Affiliation:
Laboratory of Materials Science, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands
R. Delhez
Affiliation:
Laboratory of Materials Science, Delft University of Technology, Rotterdamseweg 137, 2628 AL Delft, The Netherlands
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Abstract

Limitations in powder diffractometry imposed by scatter slits and/or a diffracted-beam monochromator, which have been ignored in the past, are discussed and mapped quantitatively. These limitations become manifest especially with ωoffsets, i.e.in stress measurements and with ωoscillation to improve the reproducibility of intensities in the presence of too coarse grains. The limitations can only be established with knowledge of slit sizes and with precise alignment of all slits, their holders and the diffracted-beam monochromator. To that end, concise, accurate procedures for obtaining these measurements in-situare proposed.

Information

Type
Research Article
Information
Powder Diffraction , Volume 7 , Issue 2 , June 1992 , pp. 83 - 88
Copyright
Copyright © Cambridge University Press 1992

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References

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Timmers, J., N.M. van der, Pers, Sprong, G.J.M., Keijser, Th.H. de& Delhez, R.(1992). In preparation.Google Scholar