Journal Article

IMPULSE-2021-00166

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Neutron Larmor diffraction on powder samples

Keller, T.MLZ* ; Fabrykiewicz, P. ; Przeniosło, R. ; Sosnowska, I. ; Keimer, B.

2020
Wiley-Blackwell [S.l.]

Please use a persistent id in citations: doi:10.1107/S160057671901611X

Abstract: A hitherto unrecognized resolution effect in neutron Larmor diffraction (LD) isreported, resulting from small-angle neutron scattering (SANS) in the sample.Small distortions of the neutron trajectories by SANS give rise to a blurring ofthe Bragg angles of the order of a few hundredths of a degree, leading to adegradation of the momentum resolution. This effect is negligible for singlecrystals but may be significant for polycrystalline or powder samples. Aprocedure is presented to correct the LD data for the parasitic SANS. The latteris accurately determined by the SESANS technique (spin–echo small-angleneutron scattering), which is readily available on Larmor diffractometers. Theanalysis technique is demonstrated on LD and SESANS data from-Fe2O3powder samples. The resultingd-spacing range agrees with experimental datafrom high-resolution synchrotron radiation powder diffraction on the samesample.

Keyword(s): Instrument and Method Development (1st) ; Instrument and Method Development (2nd)

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Contributing Institute(s):

1. TRISP (TRISP)

Experiment(s):

1. TRISP: Three axes spin echo spectrometer (SR5b)

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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