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A neutron focusing experiment in the Fankuchen effect for curved crystals
Author(s) -
Boeuf A.,
Melone S.,
Rustichelli F.
Publication year - 1979
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/s0021889879012462
Subject(s) - neutron , neutron diffraction , materials science , crystal (programming language) , condensation , silicon , space (punctuation) , optics , physics , crystallography , geometry , diffraction , nuclear physics , chemistry , mathematics , thermodynamics , computer science , metallurgy , programming language , linguistics , philosophy
A recent experiment on neutron diffraction by microscopically curved silicon crystals has shown the existence of the Fankuchen effect, which is a space condensation of neutrons occurring for this kind of crystal. This paper reports an experimental analysis of neutron focusing in the Fankuchen effect for curved crystals. The focusing effect in a symmetrical geometry was also investigated for comparison. The results are discussed and a conclusion is derived concerning a gain in neutron current density for the Fankuchen geometry, particularly interesting for neutron diffractometry of small biological crystals.