The design, function and application of a curved crystal graphite monochromator in X-ray diffractometry are reviewed. By further diffraction of the primary diffracted X-ray beam, the crystal removes unwanted radiation, including K-beta and other target lines and fluorescent or scattered radiation from the sample, with the result that signal-to-background ratios are significantly improved. Recorder scans and signal-to-noise data are presented for a variety of chemical compounds, including an ash deposit from a ship's boiler, to illustrate the effectiveness of the monochromator in the analytical application of X-ray diffractometry.
NASA STI/Recon Technical Report N
- Pub Date:
- December 1976
- X Ray Diffraction;
- Nondestructive Tests;
- Signal To Noise Ratios;
- Instrumentation and Photography