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Spurious peaks arising from multiple scattering events involving the sample environment in inelastic neutron scattering
Author(s) -
Pintschovius Lothar,
Reznik Dmitry,
Weber Frank,
Bourges Philippe,
Parshall D.,
Mittal Ranjan,
Chaplot Samrath Lal,
Heid Rolf,
Wolf Thomas,
Lamago Daniel,
Lynn Jeffrey W.
Publication year - 2014
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/s1600576714010140
Subject(s) - scattering , inelastic neutron scattering , inelastic scattering , neutron scattering , small angle neutron scattering , neutron , spurious relationship , biological small angle scattering , spectrometer , quasielastic scattering , physics , quasielastic neutron scattering , nuclear physics , sample (material) , computational physics , materials science , optics , computer science , thermodynamics , machine learning
Well defined peaks with energies of about 18 meV have been observed in a variety of inelastic neutron scattering experiments on both single crystals and powders, using either the triple‐axis or the time‐of‐flight technique. They can easily be mistaken for signatures of real excitations. It has been found that they are due to multiple scattering events involving primarily the walls of the sample environment. Hence, they are particularly troublesome in experiments using very small samples, as have been used with recently developed high‐intensity neutron spectrometers. Measures required to reduce the unwanted scattering to a minimum are also discussed.