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High‐efficiency focusing of hard X‐rays exploiting the quasi‐mosaic effect in a bent germanium crystal
Author(s) -
Camattari Riccardo,
Paternò Gianfranco,
Battelli Alessandro,
Bellucci Valerio,
Bastie Pierre,
Guidi Vincenzo
Publication year - 2014
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/s1600576714005056
Subject(s) - mosaicity , bent molecular geometry , optics , germanium , diffraction , crystal (programming language) , monochromatic color , materials science , x ray crystallography , beam (structure) , crystallography , anisotropy , physics , optoelectronics , chemistry , silicon , computer science , composite material , programming language
A germanium crystal was bent through a grid of superficial grooves, manufactured on the sample surface. The resulting diffraction planes were bent thanks to quasi‐mosaicity, which is an effect of mechanical anisotropy in crystals. High integrated diffraction efficiency was achieved in symmetric Laue geometry with a monochromatic X‐ray beam set at 150 and 300 keV. It is demonstrated that the sample is capable of efficiently focusing X‐rays. Such crystals can be used as optical components to focalize X‐ and γ‐rays in a high‐resolution Laue lens.