Abstract

In small angle X-ray scattering (SAXS) experiments, there exists an optimal sample thickness to obtain measurements with the maximum signal-to-noise ratio and best statistics. In practice, the sample thickness may deviate from the optimal value due to certain conditions. For thick samples, smearing may appear for the scattering data and an equivalent sample position to compute the scattering vector. Calculations show that the sample thickness has a similar effect on SAXS for monodisperse and polydisperse systems. Qualitative and quantitative analysis has been performed to determine the deviation of equivalent sample position from the irradiated sample center.

摘要

在小角度 X 射线散射 (SAXS) 实验中，存在最佳样品厚度以获得具有最大信噪比和最佳统计数据的测量值。在实践中，由于某些条件，样品厚度可能会偏离最佳值。对于较厚的样品，散射数据和计算散射矢量的等效样品位置可能会出现拖尾现象。计算表明，样品厚度对单分散和多分散系统的 SAXS 具有相似的影响。已进行定性和定量分析以确定等效样品位置与受辐照样品中心的偏差。