X-RAY ANALYSIS APPARATUS INCLUDING A MONOCHROMATOR CRYSTAL HAVING CRYSTAL LATTICE SURFACES

摘要

The monochromator in an X-ray analysis apparatus comprises a crystal (1) which preferably has spherically curved crystal lattice surfaces, the boundary surface of the crystal, which is to be irradiated, having a radius of curvature (2R) in a first principal direction which equals that of the crystal lattice surfaces, and a radius of curvature (R) in a second principal direction, transverse with respect to the first direction, which is twice as small. A high radiation efficiency is obtained by constructing an entrance slit (3) and/or an exit slit (4) for the X-rays so as to conform to curved circles of lattitude on the Rowland sphere (c) applicable to the crystal (7).