X-RAY DIFFRACTION METHOD AND NEUTRON BEAM DIFFRACTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide an X-ray or neutron beam diffraction method capable of measuring a spatial reciprocal lattice in a membrane or the like in a non- destructive manner without missing the same to perform the identification of an unknow phase or the recognition of the presence of a twin crystal. SOLUTION: When the reciprocal lattice point in a sample is measured by the X-ray diffraction method, X-ray diffraction, which is equipped with four movable axes comprising a 2 axis being the angle form by incident X-rays and diffracted X-rays, a axis being the angle formed by incident X-rays and the sample, a axis being a tilt angle in the direction vertical to the incident direction of X-rays and a * axis being the in-plane angle of rotation of the sample, is used, and the 2 axis and the axis are coupled to scan a constant angle section and, subsequently, the axis is shifted to scan the constant angle section while again coupling the 2 axis and the axis. This operation is repeated up to the maximum angle of 90 deg. to measure the reciprocal lattice point and, during this measurement, the * axis is rotated at a high speed.