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A foil-mask spectrometer for laue pattern imaging: simultaneous position, intensity and energy
Journal of Synchrotron Radiation
|May 1, 1996
Summary
A novel X-ray spectrometer enables simultaneous position, intensity, and energy measurements for Laue diffraction. This foil-mask instrument offers high resolution for unit-cell determination and intensity discrimination for complex crystal structures.
Area of Science:
- Crystallography
- Materials Science
- Spectroscopy
Background:
- Laue diffraction is crucial for crystal structure determination.
- Accurate energy, position, and intensity measurements are vital for detailed crystallographic analysis.
- Existing methods may face challenges with overlapping reflections and precise energy determination.
Purpose of the Study:
- To describe a novel X-ray spectrometer for simultaneous position, intensity, and energy determination.
- To enable precise measurements for Laue diffraction applications.
- To demonstrate the capability of determining crystal structures without monochromatic methods.
Main Methods:
- Development of a foil-mask X-ray spectrometer with multiple metal foils.
- Implementation of three operational modes: high-resolution, intensity discriminator, and low-resolution.
- Utilizing varying foil composition and thickness to modulate X-ray energy.
Main Results:
- The spectrometer achieved high resolution (theoretically >50 eV) suitable for unit-cell parameter determination.
- Demonstrated intensity discrimination for resolving spatially overlapped reflections.
- Successfully separated up to three components of harmonic overlap.
- Accurate energy measurements for Mo Kalpha (17.5 +/- 0.1 keV) and Cu Kalpha (8.08 +/- 0.05 keV) were obtained.
Conclusions:
- The developed X-ray spectrometer is effective for Laue diffraction applications.
- It facilitates simultaneous position, intensity, and energy measurements.
- This technology shows the feasibility of complete crystal structure determination using Laue diffraction alone.
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