Multiple-wavelength powder diffraction using imaging plates at the Australian National Beamline
D J Cookson1, B A Hunter, S J Kennedy
1Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai 2234, Australia.
Journal of Synchrotron Radiation
|July 21, 2004
Summary
Researchers developed a fast method for collecting anomalous diffraction data using the Australian powder diffractometer. This technique enables rapid analysis of materials like copper oxide superconductors near X-ray absorption edges.
Area of Science:
- Materials Science
- Crystallography
- Physics
Background:
- Powder diffraction is crucial for material characterization.
- Anomalous diffraction provides element-specific structural information.
- Efficient data collection methods are needed for complex materials.
Purpose of the Study:
- To present a novel, rapid data collection technique for anomalous diffraction.
- To demonstrate the application of this technique to copper oxide superconductors.
- To detail the method for extracting data from imaging plates.
Main Methods:
- Utilizing the Australian powder diffractometer at the Photon Factory.
- Employing imaging plates in Debye-Scherrer geometry for fast data acquisition ( < 5 min/pattern).
- Incrementing X-ray beam energy in small steps ( ~2 eV) between scans.
Main Results:
- Successfully collected multiple powder-diffraction scans rapidly.
- Acquired anomalous diffraction data near the Cu K-absorption edge of a copper oxide superconductor.
- Developed and applied a technique to extract data from imaging plates.
Conclusions:
- The described method enables fast collection of anomalous diffraction data.
- This technique is effective for studying superconductors and other materials.
- Imaging plates combined with energy-stepping offer significant advantages in diffraction studies.
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