Nouhi Shirin, Hellsing Maja S, Kapaklis Vassilios, Rennie Adrian R
Division for Materials Physics, Department of Physics and Astronomy, Uppsala University, Box 516, 751 20, Uppsala, Sweden.
J Appl Crystallogr. 2017 Jul 7;50(Pt 4):1066-1074. doi: 10.1107/S1600576717007518. eCollection 2017 Aug 1.
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.
随着入射光束掠射角增大并探测样品中不同深度，会观察到散射的变化。已开发出一个模型来描述掠入射小角中子散射（GISANS）实验中观测到的强度。这包括仪器分辨率、样品透射率（其取决于吸收和散射两者）以及样品结构的显著影响。用在两台不同仪器上测量的具有不同尺寸颗粒的两种胶体样品的自组织结构对计算进行了测试。该模型允许针对具有确定分辨率的各种仪器进行计算，并可用于设计未来改进的实验。使用模型计算讨论了GISANS在不同研究中的可能性和局限性。
