The energy dispersive scheme of X‐ray fluorescence analysis with a crystal polarizer and polycapillary optics

• Published in: X-ray spectrometry 2017-11, Vol.46 (6), p.548-553
• Main Authors: Turyanskiy, A.G., Gizha, S.S., Senkov, V.M., Stanishevskiy, Ya.M.
• Format: Article
• Language: English
• Subjects: Alpha rays; Anodic polarization; Background radiation; Crystals; Diamonds; Diffraction; Divergence; Fluorescence; Line spectra; Monochromatization; Optics; Polarization; Polarizers; X ray fluorescence analysis; X-ray fluorescence
• ISSN: 0049-8246; 1097-4539
• DOI: 10.1002/xrs.2794

The efficiency of the polarization scheme based on polycapillary optics and a diamond crystal polarizer was demonstrated. The scheme provides suppression of the background of scattered radiation in measuring X‐ray fluorescence spectra. A quasi‐parallel X‐ray beam with an angular divergence of 4.2 mrad was formed by a microfocus source with a copper anode and polycapillary half‐lens. Simultaneous polarization and monochromatization of radiation was obtained with a crystal of natural diamond, which was set at the diffraction reflection (113). The degree of polarization of CuKα1 spectral line and the maximum radiation flux were respectively equal to 99.86% and 5 · 106 photon/s. In the direction orthogonal to the plane of diffraction, the maximum attenuation of the background was up to 19 dB.