Measuring Single-Crystal Diffuse Neutron Scattering on the Wombat High-Intensity Powder Diffractometer |
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| Authors: | R. E. Whitfield D. J. Goossens A. J. Studer J. S. Forrester |
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| Affiliation: | 1.Research School of Physics and Engineering,Australian National University,Canberra,Australia;2.Research School of Chemistry,Australian National University,Canberra,Australia;3.Bragg Institute, Australian Nuclear Science and Technology Organisation,Sydney,Australia;4.School of Engineering,The University of Newcastle,Newcastle,Australia |
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| Abstract: | Single-crystal diffuse scattering was collected on the Wombat high-intensity powder diffractometer at the OPAL reactor at the Bragg Institute. The difficulty in measuring diffuse scattering comes from its relatively low intensity compared to the Bragg peaks, a factor of 10310^{3} to 10410^{4} smaller. Wombat allows collection of diffuse scattering due to its high intensity and large two-dimensional detector. Diffuse scattering data from yttria-stabilized cubic zirconia (YCSZ, Y2O3hbox{Y}_2hbox{O}_3 stabilized ZrO2hbox{ZrO}_2) and PbZn1/3Nb2/3O3hbox{PbZn}_{1/3}hbox{Nb}_{2/3}hbox{O}_3 (PZN) were successfully collected, the latter at a range of temperatures. The data were processed, normalized, and background subtracted to reconstruct flat reciprocal space sections with a minimum of artifacts. The strategies used to tackle the collection of neutron diffuse scattering and the way in which they are implemented will be discussed. The results show that the neutron powder diffractometer with a continuous detector is capable of collecting high-quality diffuse scattering data. |
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