Model independent determination of the elastic incoherent structure factorin neutron scattering experiments

Authors
Kemner, E de Schepper, IM Schmets, AJM Grimm, H
Citation
E. Kemner et al., Model independent determination of the elastic incoherent structure factorin neutron scattering experiments, NUCL INST B, 160(4), 2000, pp. 544-549
Citations number
5
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
ISSN journal
0168583X → ACNP
Volume
160
Issue
4
Year of publication
2000
Pages
544 - 549
Database
ISI
SICI code
0168-583X(200004)160:4<544:MIDOTE>2.0.ZU;2-U
Abstract
In quasielastic neutron scattering (QENS) the dynamic structure factor S(Q, omega) consists of an elastic central line with area given by the elastic incoherent structure factor (EISF) and a continuous quasielastic broadening . Using only the resolution function of the spectrometer we discuss a metho d to derive the EISF directly from the raw experimental data points S(Q, om ega) without any smoothing or any modelling of the quasielastic broadening. We compare this model to the Fourier transform method, show how it works o n actual neutron scattering data and discuss its accuracy for several cases . (C) 2000 Elsevier Science B.V. All rights reserved.