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Observation of an X-Ray Beam 10 Microradian Divergence Without Using any Collimator

Published online by Cambridge University Press:  06 March 2019

K. Das Gupta
K. Das Gupta*
Affiliation:
Radiation Research Laboratory Department of Physics and Engineering Physics Texas Tech University, Lubbock, Texas 79409
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Extract

I report the experimental setup to obtain an x-ray beam from germanium monocrystal of unusually small angle of vertical divergence of the order of 2 sec. of arc without using any collimator. The production and the properties of the highly collimated beam of x-ray will be described. A rectangular piece of germanium 1” × 1” and of thickness 0.5 mm has been cut with specific orientation of crystallographic planes (111) and (110). The 1” × 1” surface is parallel to (111) planes and the surface of one edge is parallel to (110) planes suitable for Borrmann channelling via (220) planes.

Information

Type
VII. XRD Methods and Instrumentation
Information
Advances in X-Ray Analysis , Volume 25: Thirtieth Annual Conference on Applications of X-ray Analysis, August 3-7, 1981 , 1981 , pp. 325 - 328
Copyright
Copyright © International Centre for Diffraction Data 1981

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References

1. Borrmann, G. and Hartwig, W., Z. Kristallogr. 121:401 (1965).Google Scholar
2. Post, Ben, Chang, S. L., and Huang, T. C.,’ Simultaneous Four-Beam Borrmann Diffraction, Acta Cryst. A33:90 (1977).Google Scholar
3. Huang, T. C. and Ben Post, ‘Experimental Methods for the Study of Multiple Borrmann Diffraction, Acta Cryst. A29:35 (1973).Google Scholar