Department of Mechanical, Aerospace and Nuclear Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180, USA.
J Chem Phys. 2010 May 7;132(17):174509. doi: 10.1063/1.3422527.
The application of the spin-echo small angle neutron scattering (SESANS) technique for structural characterization of interacting colloidal suspensions is considered in this work. The framework to calculate the theoretical SESANS correlation function is briefly laid out. A general discussion regarding the features of the SESANS correlation functions obtained from different model systems is presented. In comparison with conventional elastic scattering tools operating at the same length scale, our mean-field calculations, based on a monodisperse spherical colloidal system, show that the real-space measurement provided by SESANS presents a powerful probe for studying the intercolloid potential. The reason of this sensitivity is discussed from the standpoint of way, in which how the spatial correlations are manifested in different neutron scattering implementations. This study leads to a better understanding regarding the distinction between SANS and SESANS.
这项工作考虑了自旋回波小角中子散射 (SESANS) 技术在相互作用胶体悬浮液结构表征中的应用。简要阐述了计算理论 SESANS 相关函数的框架。提出了关于从不同模型系统获得的 SESANS 相关函数特征的一般性讨论。与在相同长度尺度下运行的常规弹性散射工具相比，我们基于单分散球形胶体系统的平均场计算表明，SESANS 提供的实空间测量是研究胶体间势的有力探针。从不同中子散射实现方式中表现出空间相关的方式的角度讨论了这种敏感性的原因。这项研究有助于更好地理解 SANS 和 SESANS 之间的区别。
