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@ARTICLE{Jacobs:280529,
author = {Jacobs, Philipp and Houben, Andreas and Schweika, Werner
and Tchougréeff, Andrei L. and Dronskowski, Richard},
title = {{A} {R}ietveld refinement method for angular- and
wavelength-dispersive neutron time-of-flight powder
diffraction data},
journal = {Journal of applied crystallography},
volume = {48},
number = {6},
issn = {1600-5767},
address = {Copenhagen},
publisher = {Munksgaard},
reportid = {FZJ-2016-00297},
pages = {1627 - 1636},
year = {2015},
abstract = {This paper introduces a two-dimensional extension of the
well established Rietveld refinement method for modeling
neutron time-of-flight powder diffraction data. The novel
approach takes into account the variation of two parameters,
diffraction angle 2[theta] and wavelength [lambda], to
optimally adapt to the varying resolution function in
diffraction experiments. By doing so, the refinement against
angular- and wavelength-dispersive data gets rid of common
data-reduction steps and also avoids the loss of
high-resolution information typically introduced by
integration. In a case study using a numerically simulated
diffraction pattern of Rh0.81Fe3.19N taking into account the
layout of the future POWTEX instrument, the profile function
as parameterized in 2[theta] and [lambda] is extracted. As a
proof-of-concept, the resulting instrument parameterization
is then utilized to perform a typical refinement of the
angular- and wavelength-dispersive diffraction pattern of
CuNCN, yielding excellent residuals within feasible
computational efforts. Another proof-of-concept is carried
out by applying the same approach to a real neutron
diffraction data set of CuNCN obtained from the POWGEN
instrument at the Spallation Neutron Source in Oak Ridge.
The paper highlights the general importance of the novel
approach for data analysis at neutron time-of-flight
diffractometers and its possible inclusion within existing
Rietveld software packages.},
cin = {JCNS-2 / PGI-4 / JARA-FIT / ESS / JCNS (München) ; Jülich
Centre for Neutron Science JCNS (München) ; JCNS-FRM-II},
ddc = {540},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$ / I:(DE-Juel1)VDB361 /
I:(DE-Juel1)JCNS-FRM-II-20110218},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6212 - Quantum
Condensed Matter: Magnetism, Superconductivity (POF3-621) /
6213 - Materials and Processes for Energy and Transport
Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
G:(DE-HGF)POF3-6G4},
experiment = {EXP:(DE-MLZ)POWTEX-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000365774800005},
pubmed = {pmid:26664340},
doi = {10.1107/S1600576715016520},
url = {https://juser.fz-juelich.de/record/280529},
}