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TOF Measurements of Pulsed Neutrons for Texture Analysis of Low Symmetry Materials

Published online by Cambridge University Press:  21 February 2011

Allen C. Larson ,
Phillip J. Vergamini  and
Hans-Rudolf Wenk
Allen C. Larson
Affiliation:
Manual Lujan, Jr. Neutron Scattering Center, LANSCE, Los Alamos National Laboratory, Los Alamos, NM
Phillip J. Vergamini
Affiliation:
Manual Lujan, Jr. Neutron Scattering Center, LANSCE, Los Alamos National Laboratory, Los Alamos, NM
Hans-Rudolf Wenk
Affiliation:
Department of Geology and Geophysics, University of California, Berkeley, CA
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Abstract

The single crystal diffractometer at LANSCE, SCD, provides an ideal ca- pability for the study of preferred orientation in geological samples by time-of flight(TOF) measurement of pulsed neutrons. The 2-d position sensitive neutron detector with the large wave length range allows one to measure the complete dis- tribution of intensities for several poles very quickly. Each histogram covers about πt2/16 radians of reciprocal space and contains information from all possible poles visible with the wave length range used, usually about 0.5 to 5.OÅ. With this method complete pole figures of many lattice planes can be constructed from only 12 to 20 sample orientations as compared to over 1000 sample settings per lattice plane using conventional diffractometers.

Pole figures from measurements of experimentally deformed standard samples of calcite and quartzite with a known history of deformation provide in- formation about deformation mechanisms and their temperature/strain history. This information can be applied to interpret preferred orientation of naturally de- formed rocks.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 166: Symposium J – Neutron Scattering for Materials Science , 1989 , 337
Copyright
Copyright © Materials Research Society 1990

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References

REFERENCES

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