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Replacement of monochromator and proportional gas counter by mercuric iodide detector in X‐ray powder diffraction
Author(s) -
Nissenbaum J.,
Levi A.,
Burger A.,
Schieber M.
Publication year - 1983
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889883010067
Subject(s) - monochromator , proportional counter , tetragonal crystal system , detector , x ray detector , crystallite , x ray , particle detector , radiation , analytical chemistry (journal) , optics , powder diffraction , materials science , iodide , resolution (logic) , chemistry , physics , crystallography , crystal structure , wavelength , organic chemistry , chromatography , artificial intelligence , computer science
Low‐resolution and therefore low‐cost mercuric iodide detectors have successfully been applied to replace the combination of a graphite monochromator and a proportional gas radiation counter used in X‐ray diffractometers. The mercuric iodide detector requires a lower DC bias of only 200 V rather than the 1500 V bias needed for the proportional gas counter. The much better stopping power of HgI 2 allows higher counting efficiency and therefore a better signal‐to‐noise ratio. Results are shown for X‐ray powder diffractions of polycrystalline cubic silicon and tetragonal HgI 2 .