Premium
Polycapillary focusing optic for small‐sample neutron crystallography
Author(s) -
Gibson W. M.,
Schultz A. J.,
ChenMayer H. H.,
Mildner D. F. R.,
GnäupelHerold T.,
Miller M. E.,
Prask H. J.,
Vitt R.,
Youngman R.,
Carpenter J. M.
Publication year - 2002
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/s0021889802014917
Subject(s) - optics , monochromatic color , diffraction , neutron diffraction , beam (structure) , materials science , neutron , wavelength , crystal (programming language) , physics , nuclear physics , computer science , programming language
The relatively low flux from neutron sources means that structural analysis using neutron diffraction requires large crystals that are often not available. The feasibility of a polycapillary focusing optic to produce a small intense spot of size < ∼0.5 mm for small crystals has been explored and such an optic has been tested both on a monochromatic and on a polychromatic beam. In a diffraction measurement from an α‐quartz crystal using a 2.1° convergent beam from a pulsed neutron source, six diffraction peaks in the 1.5–4 Å wavelength bandwidth transmitted by the optic were observed. These diffraction spots show an intensity gain of 5.8 ± 0.9 compared with a direct beam diffracting from the same sample volume as that illuminated by the convergent beam.