Patent ID: 7471766
Filing Date: 2008-12-30
Classification: G01N

Abstract:
1. An X-ray diffraction apparatus comprising: an X-ray source which generates X-ray to be irradiated on a sample; an X-ray detector which detects X-ray emitted from the sample; a divergence slit which is disposed between the X-ray source and the sample, the slit width of which can be controlled; a scattering slit which is disposed between the sample and the X-ray detector, the slit width of which is constant; a θ-rotator which changes the incident angle (θ) of X-ray emitted from the X-ray source and entering the sample through the divergence slit; a 2θ-rotator which changes the diffracted X-ray detection angle (2θ) at which the X-ray detector detects X-ray diffracted by the sample and passed through the scattering slit; and a divergence slit width controller which controls the slit width of the divergence slit, wherein the X-ray incident angle (θ) is changed by the θ-rotator, the diffracted X-ray detection angle (2θ) is changed by the 2θ-rotator such that the diffracted X-ray detection angle (2θ) at which the X-ray detector detects X-ray is kept at an angle double that of the X-ray incident angle (θ); the slit width of the divergence slit is controlled by the divergence slit width controller such that the irradiation width of X-ray to be irradiated on the sample is made constant during a change in the X-ray incident angle (θ), the slit width of the scattering slit is kept constant, and X-ray emitted from the sample is detected by the X-ray detector.