Hostname: page-component-7b7567c8c-2n9c9 Total loading time: 0 Render date: 2026-11-14T09:37:45.951Z Has data issue: false hasContentIssue false
  • English
  • Français

Asymmetric Crystals Re-Visited

Published online by Cambridge University Press:  06 March 2019

Michael A. Short and
Stephen E. Robie
Michael A. Short
Affiliation:
SRS Technologies, Irvine, California
Stephen E. Robie
Affiliation:
Scintag, Inc., Santa Clara, California
Get access

Extract

An asymmetrically cut single crystal is, generally, a large flat X-ray monochromating crystal whose principal surface has been cut an angle to the diffracting planes being utilised.

The use of such a crystal was suggested by Stephen and Barnes in 1935 as a means of obtaining a narrow intense beam of monochromatic X-rays. Fankuchen was first to demonstrate this effect experimentally. A number of symmetrically cut mosaic single crystals, including lithium fluoride, was studied by Evans, Hirsch and Kellar and by Gay, Hirsch and Kellar in the beam condensing (beam narrowing) mode only.

Information

Type
VI. XRD Techniques, Instrumentation and P.C. Applications
Information
Advances in X-Ray Analysis , Volume 31: Thirty-Sixth Annual Conference on Applications of X-ray Analysis, August 3-7, 1987 , 1987, pp. 395 - 401
Copyright
Copyright © International Centre for Diffraction Data 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Article purchase

Temporarily unavailable

References

1. Stephen, R.A. and Barnes, R.J., “New Techniques for Obtaining X-Rey PowderPatterns”, Nature, 137, 532 (1936).Google Scholar
2. Fankuchen, I., “A Condensing Monochromator for X-Rays”, Nature 139, 193 (1937).Google Scholar
3. Evans, R.C., Hirsch, P.B. and Kellar, J.N., “A ‘Parallel-Beam' Concentrating Monochromator for X-Rays”, Acta Cryst., 1, 124 (1948).Google Scholar
4. Gay, P., Hirsch, P.B. and Kellar, J.H., “Asymmetric X-Ray Reflexions from Abraded Crystals”, Acta Cryst., 5, 7 (1952).Google Scholar
5. Debye, P. and Menke, H. (1931), quoted in Reference 6.Google Scholar
6. Bozorth, R.M. and Haworth, F.E., “Focusing of an X-Ray Beam by a Rocksalt Crystal”, Phys. Rev., 53, 538 (1938).Google Scholar
7. Fankuchen, I., “Intense Monochromatic Beam of X-Rays”, Phys. Rev., 53, 910 (1938).Google Scholar
8. Renninger, M., “Asymmetriche Bragg-Reflexion am Idealkristal zuer Erhohung des Doppelspektrometer-Auflo sungs verntogens”, Z. Naturforsch., 16a, 1110 (1961),Google Scholar
9. Kohra, K., “An Application of Asymmetric Reflection for Obtaining X-Ray Beams of Extremely Narrow Angular Spread”, J. Phys. Soc. Japan, 17, 589 (1962).Google Scholar
10. Renninger, M., “The Asymmetric Bragg Reflection and Its Application in Double Crystal Diffractometry”, Advances in X-Ray Analysis, 10, 32 (1967)Google Scholar
11. DuMond, J.U.M., (1937), quoted by Hart, M. et al, in Acta Cryst., A40, 502 (1984).Google Scholar
12. Kohraatid, K. Kikuta, S., “A Method of Obtaining an Extremely Parallel X-Ray Beam by Successive Asymmetric Diffractions and Its Applications”, Acta Cryst., A24, 200 (1968).Google Scholar
13. Kohra, K., “Dynamical Asymmetric Diffraction and Its Applications to X-Ray Ootical Systems”, Proc. Sixth Int. Conf. on X-Ray Optics and Microanalysis, p. 35, Ed, Shinoda, G. et al., Univ. of Tokyo Press (1972).Google Scholar
14. Brown, D.B., Fatemi, M. and Birks, L.S., “X-Ray Diffraction in Crystals of Intermediate Perfection. II. A Treatment of LiF in Symmetrical Bragg Geometry”. J. Appl, Phys., 45, 1555 (1974).Google Scholar