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Low Temperature X-Ray Diffractometer with Closed Cycle Refrigeration System

Published online by Cambridge University Press:  06 March 2019

U. Benedict ,
Y. Cornay  and
C. Dufour
U. Benedict
Affiliation:
Commission of the European Communities, Joint Research Centre, European Institute for Transuranium Elements, P. O. Box 22 66, D-7500 Karlsruhe
Y. Cornay
Affiliation:
Commission of the European Communities, Joint Research Centre, European Institute for Transuranium Elements, P. O. Box 22 66, D-7500 Karlsruhe
C. Dufour
Affiliation:
Commission of the European Communities, Joint Research Centre, European Institute for Transuranium Elements, P. O. Box 22 66, D-7500 Karlsruhe
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Abstract

An assembly consisting of an X-ray tube, a quartz crystal monochromator, and a vertical X-ray goniometer with proportional counter was mounted in a glove box for work with actinide metals and compounds. An evacuated camera containing the expander tube of a closed-cycle cryogenic system was fitted onto the goniometer. A thin layer of the powdered sample was fixed on the end-plate of the expander tube. Beryllium windows were provided in the camera wall for the incident and for the diffracted beam.

The cooling camera is suitable for use with thin powder layers or metallic foils. Thicker layers can be studied, but a strong thermal gradient perpendicular to the specimen surface is expected. The camera has been applied to the study of lattice contraction and phase transformation at low temperature In actinide metals and compounds .

Type
Research Article
Information
Advances in X-Ray Analysis , Volume 22: Twenty-Seventh Annual Conference on Applications of X-ray Analysis, August 1-4, 1978 , 1978 , pp. 89 - 99
Copyright
Copyright © International Centre for Diffraction Data 1978

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References

1. Rudman, R., “The Proper Description of Low Temperature X-Ray Diffraction Apparatus,” J. Appl. Cryst. 10, 209–210 (1977).Google Scholar
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3. Benedict, U., Dufour, C., Scholten, O., “Lattice Parameter Varia tion of PuC, PuN, and Pu(C,N) between 50 and 350 K,” J. Nucl. Mat. 73, 208–212 (1978).Google Scholar
4. Benedict, U., Dufour, C., Mayne, K., ‘’Low Temperature XRD Study of Actinide Metals and Compounds,” Proc. 3rd Int. Conf. Electronic Structure of the Actinides, Grenoble, France, Aug. 30 Sept. 1, 1978, to be published in Physique, J..Google Scholar