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Intensitätsmessung bei ruhender Probe am Neutronen‐Einkristalldiffraktometer
Author(s) -
Egert G.
Publication year - 1974
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/s0021889874010442
Subject(s) - monochromator , bent molecular geometry , germanium , materials science , optics , monochromatic color , intensity (physics) , crystal (programming language) , beam (structure) , physics , optoelectronics , silicon , wavelength , computer science , composite material , programming language
In neutron single‐crystal diffractometry integrated intensities are usually measured by rotating the specimen through the reflecting position. It is possible, however, to produce a monochromatic beam with properties that allow intensity measurement with a fixed specimen. For this bent monochromators are especially suitable, but plane mosaic‐crystal monochromators in antiparallel (+) position can also be used. The production, suitability and use of a plastically bent germanium monochromator is discussed. By means of a structure determination of the room‐temperature phase of NH 4 Br, intensity measurements with a fixed specimen are compared with measurements of integrated intensities. With regard to accuracy, the methods are equivalent. With a bent germanium monochromator, the intensity measurement with a fixed specimen leads, especially in the range of high Bragg angles, to a reduction of the measuring time by a factor of at least two.