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Materials Science Applications of the New National Institute of Standards and Technology Powder Diffractometer

  • J. K. Stalick (a1), E. Prince (a1), A. Santoro (a1), I. G. Schroder (a1) and J. J. Rush (a1)...

Abstract

The new high-resolution neutron powder diffractometer BT-1 at the NIST reactor has proven to be a powerful and versatile instrument in its first year of operation. With 32 detectors arranged at 5° intervals and a 12° scan range, powder diffraction patterns can be collected to 167° 2θ. There is a choice of three monochromator take-off angles (75°, 90°, and 120°) so that the peak-width minimum can be matched to the rf-spacing range that is most important for each sample; all choices have a wavelength close to 1.54 Å. Data can be collected on sample sizes ranging from 200 mg to 30 g. Temperatures of 0.3 K to 1400 K are routinely available, and a magnetic field of 7T can be applied with a superconducting magnet. Typical data collection times range from 1-12 hours depending upon sample size and desired resolution. Examples are given of a variety of materials applications.

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References

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1 Prince, E., NISTIR 5120, 24 (1993).
2 Stalick, J. K., NISTIR 5362, 26 (1994).
3 Waterstrat, R. M., Stalick, J. K., Meng-Burany, X., Curzon, A. E., and Estermann, M. A., J. Alloys and Compounds (submitted).
4 Stalick, J. K., 1994 (unpublished).
5 Morris, R. E., Owen, J. J., Stalick, J. K., and Cheetham, A. K., J. Solid State Chem., 111, 52 (1994).

Materials Science Applications of the New National Institute of Standards and Technology Powder Diffractometer

  • J. K. Stalick (a1), E. Prince (a1), A. Santoro (a1), I. G. Schroder (a1) and J. J. Rush (a1)...

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