Grazing-incidence small-angle neutron scattering from structures below an interface

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Abstract

Changes of scattering are observed as the grazing angle of incidence of an incoming beam increases and probes different depths in samples. A model has been developed to describe the observed intensity in grazing-incidence small-angle neutron scattering (GISANS) experiments. This includes the significant effects of instrument resolution, the sample transmission, which depends on both absorption and scattering, and the sample structure. The calculations are tested with self-organized structures of two colloidal samples with different size particles that were measured on two different instruments. The model allows calculations for various instruments with defined resolution and can be used to design future improved experiments. The possibilities and limits of GISANS for different studies are discussed using the model calculations.

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Nouhi, S., Hellsing, M. S., Kapaklis, V., & Rennie, A. R. (2017). Grazing-incidence small-angle neutron scattering from structures below an interface. Journal of Applied Crystallography, 50, 1066–1074. https://doi.org/10.1107/S1600576717007518

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