| 摘要 |
PROBLEM TO BE SOLVED: To obtain an X-ray diffraction spectrum required for identifying a material or elucidating a crystal structure by irradiating floating particles with X-rays. SOLUTION: Parallel X-rays are radiated at a divergent angle of <=10 milliradian toward the center of a container 2 containing a power sample 1 in a fluidized state through an incidence-side X-ray diverging angle limiter 3. Of the secondary X-rays generated from part of the sample 1 at an unspecified position, the parallel secondary X-rays diverged at an angle of <=10 milliradian in a designated direction are selectively transmitted through a receiving-side X-ray diverging angle limiter 4 which can be turned around the container 2. Therefore, an X-ray diffraction spectrum having an accurate reflecting intensity can be obtained, because the parallel secondary X-ryas which are emitted from crystal grains floating in unspecific azimuth and diverged at a angle of <=10 milliradian can be caught efficiently. |
