Neutron Diffraction and Ultrasonic Sounding: A Tool for Solid Body Investigation
Texture analysis of coarse grained polyphase rock samples can be presently determined by using neutron diffraction with a position sensitive detector and the time-of-flight diffractometry. A pulsed source of neutron was used. The results show that neutron diffraction provides quantitative texture data and has several advantages over conventional X-ray diffraction. Most important is the high transmission for most materials, the measuring pole figures on large coarse-grained samples and the measuring all pole figures with high accuracy (no corrections) simultaneously. The method is especially useful for geological samples, which are often composites of low symmetry constituents and therefore characterised by complex diffraction patterns with numerous partly and completely overlapping Bragg reflections. Theoretically, the textures of all mineral phases may be determined even from such complicated experimental data. The advantage of the neutron diffraction on spherical samples is that the scattering takes place in the whole sample volume. Consequently, the average texture of the whole sample is obtained.
KeywordsNeutron Diffraction Pole Figure Minimum Velocity Olivine Crystal Position Sensitive Detector
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