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Small‐angle scattering at a pulsed neutron source: comparison with a steady‐state reactor
Author(s) -
Borso C. S.,
Carpenter J. M.,
Williamson F. S.,
Holmblad G. L.,
Mueller M. H.,
Faber J.,
Epperson J. E.,
Danyluk S. S.
Publication year - 1982
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/s0021889882012333
Subject(s) - collimator , spallation , neutron source , spallation neutron source , scattering , neutron scattering , nuclear physics , neutron , proportional counter , flux (metallurgy) , diffractometer , physics , chemistry , optics , detector , scanning electron microscope , organic chemistry
A time‐of‐flight small‐angle diffractometer employing seven tapered collimator elements and a two‐dimensional gas proportional counter was successfully utilized to collect small‐angle scattering data from a solution sample of the lipid salt cetylpyridinium chloride, C 21 H 38 N + .Cl − , at the Argonne National Laboratory prototype pulsed spallation neutron source, ZING‐P′. Comparison of the small‐angle scattering observed from the same compound at the University of Missouri Research Reactor corroborated the ZING‐P′ results. The results are used to compare the neutron flux available from the ZING‐P′ source relative to the well characterized University of Missouri source. Calculations based on experimentally determined parameters indicated the time‐averaged rate of detected neutrons at the ZING‐P′ pulsed spallation source to have been at least 33% higher than the steady‐state count rate from the same sample. Differences between time‐of‐flight techniques and conventional steady‐state techniques are discussed.