Patent ID: 8903044
Filing Date: 2014-12-02
Classification: G01N

Abstract:
1. An X-ray diffraction apparatus having a configuration that a divergence angle of an X-ray emitted from an X-ray source is limited by a divergence angle limiting unit, the X-ray is irradiated to an X-ray incident face of a sample held on a sample table and a diffraction X-ray diffracted from the sample is detected by an X-ray detector, a configuration that positional relationship corresponding to relative angular relationship of the X-ray source, the X-ray incident face of the sample held on the sample table and the X-ray detector is changed by a goniometer to change an incident angle of the X-ray to the sample, and the X-ray detector is disposed so as to face a diffraction direction of the diffraction X-ray diffracted from the sample, and a configuration that an X-ray shielding member is provided so as to confront the X-ray incident face of the sample so that a gap through which an incident X-ray emitted from the X-ray source and irradiated to the X-ray incident face of the sample can pass, is formed between the X-ray shielding member and the X-ray incident face of the sample, comprising a gap adjusting unit that moves the X-ray shielding member in connection with the change of the X-ray incident angle to the sample by the goniometer during execution of the X-ray diffraction measurement, thereby adjusting the breadth of the gap formed between the X-ray shielding member and the X-ray incident face of the sample in conformity with the width of the incident X-ray to the sample or the full width of the diffraction X-ray diffracted from the sample.