| 摘要 |
A radiation detecting apparatus includes a collimator and a detector, the collimator having a material for blocking radiation and a region that is a sector of an annulus or multiple regions in a configuration in the shape of a sector of an annulus for allowing transmission of the radiation. The detector is spaced a distance from the collimator such that when a radiation source and sample crystal material are positioned at suitable positions, the radiation is collimated by the collimator and contacts the sample a predetermined distance from the detector at multiple of locations corresponding to the region or regions of the collimator. The Bragg diffracted radiation from the crystal material at two or more and preferably all of the locations overlap at the detector.
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