Grazing-incidence small-angle neutron scattering from structures below an interface.
Grazing-incidence small-angle neutron scattering from structures below an interface.
复制标题
DOI：
10.1107/s1600576717007518
复制
发表时间：
2017-08-01
影响因子：
6.1
通讯作者：
Rennie AR
中科院分区：
文献类型：
--
作者：
Nouhi S;Hellsing MS;Kapaklis V;Rennie AR
对固体/液体界面附近的胶体结构进行了掠入射小角中子散射强度的计算。随着入射光束入射角的增大和探测样品的不同深度，可以观察到散射的变化。建立了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。这包括仪器分辨率的显著影响，样品传输，这取决于吸收和散射，和样品结构。用两种不同仪器测量的具有不同粒径的胶体样品的自组织结构对计算结果进行了测试。该模型允许计算具有确定分辨率的各种仪器，并可用于设计未来改进的实验。利用模型计算讨论了GISANS在不同研究中的可能性和局限性。
Calculations of intensity in grazing-incidence small-angle neutron scattering are made for colloidal structures near a solid/liquid interface. 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.