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Flat Crystal X-Ray Optics

Published online by Cambridge University Press:  06 March 2019

William J. Campbell ,
Melvin Leon  and
John Thatcher
William J. Campbell
Affiliation:
U. S. Bureau of Mines, College Park, Maryland
Melvin Leon
Affiliation:
U. S. Bureau of Mines, College Park, Maryland
John Thatcher
Affiliation:
U. S. Bureau of Mines, College Park, Maryland
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Abstract

An investigation was undertaken by the Bureau of Mines at College Park, Md., to determine the effect of various combinations of collimators, analyzing crystals and detectors on line intensities, line-to-backgrouhd ratios, and spectral resolution. The research showed that line broadening due to mosaic crystal surfaces was greatly reduced and line splitting from faults was eliminatedby the use of two fine collimators (0.005 inch, spacing, 4 inch length). Line intensities were reduced, but lineto- background ratios arid line profiles were substantially improved with double collimators. Pulse height discrimination resulted in marked improvement in the line-to-background ratio in the long-wave length region, 2 to 10 A, but was much less effective for shorter wave lengths.

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 1: Sixth Annual Conference on Industrial Applications of X-ray Analysis, August 7-9, 1957 , 1957 , pp. 193 - 206
Copyright
Copyright © International Centre for Diffraction Data 1957

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References

1. Kemp, J. W., and Andermann, G. “Cylindrical Crystal Optics,” 5th Annual Conference Industrial Applications of X-ray Analysis, Denver Research Institute, 1956.Google Scholar
2. Parrish, W., Lowitzsch, K., and. Spielberg, N. “X-ray Optics of Fluorescence Analysis Instruments.” Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, March 1956.Google Scholar
3. Birks, L. S., and Seal, R. T. J. Appl. Phys, 28, 541(1957).Google Scholar