Journal Article

PreJuSER-10331

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Experimental determination of resolution function parameters from small-angle neutron scattering data of a colloidal SiO2 dispersion

Vad, T. ; Sager, W. F. C.FZJ* ; Zhang, J.FZJ* ; Buitenhuis, J.FZJ* ; Radulescu, A.FZJ*

2010
Munksgaard Copenhagen

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Please use a persistent id in citations: doi:10.1107/S0021889810022156

Abstract: A dilute dispersion of charge-stabilized, monodisperse silica nanoparticles has been used to determine the instrumental resolution function parameters of a conventional small-angle neutron scattering instrument in pinhole geometry over the entire accessible range of momentum transfer q. Independent determination of the structure parameters of the colloidal silica dispersion by small-angle X-ray scattering enables refinement of both the q-independent geometric and the q-dependent ( wavelength spread or polychromaticity of the neutron beam) contributions to the resolution function. The procedure described is appropriate if no further instrumental characterization is available. It is demonstrated that the sample used for refining the resolution function parameters has to exhibit sharp structural scattering features such as Bragg reflections, form factor maxima and minima, or an inter-particle correlation peak for each instrumental configuration at which the measurements have been performed to cover a q range of two orders of magnitude (0.03 < q < 3.2 nm(-1)).

Keyword(s): J

Note: The authors would like to thank Dr K. Nygard for assistance in performing the SAXS experiments. Financial support by the Bundesministerium fur Bildung und Forschung (BMBF), grant No. 05 KS7OD2, is gratefully acknowledged.

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Contributing Institute(s):

1. Streumethoden (IFF-4)
2. Neutronenstreuung (IFF-5)
3. JCNS (Jülich Centre for Neutron Science JCNS (JCNS) ; JCNS)
4. Weiche Materie (IFF-7)

Research Program(s):

1. BioSoft: Makromolekulare Systeme und biologische Informationsverarbeitung (FUEK505) (FUEK505)
2. Großgeräte für die Forschung mit Photonen, Neutronen und Ionen (PNI) (FUEK415) (FUEK415)
3. 450 - BioSoft (POF2-400) (POF2-400)

Experiment(s):

1. KWS-2: Small angle scattering diffractometer (NL3ao)

Appears in the scientific report 2010

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