Betz B, Harti R P, Strobl M, Hovind J, Kaestner A, Lehmann E, Van Swygenhoven H, Grünzweig C
Paul Scherrer Institute, LNS, Neutron Imaging and Activation Group, CH-5232 Villigen, Switzerland.
European Spallation Source ESS, 22100 Lund, Sweden and University of Copenhagen, 2100 Copenhagen, Denmark.
Rev Sci Instrum. 2015 Dec;86(12):123704. doi: 10.1063/1.4937616.
In neutron grating interferometry, the dark-field image visualizes the scattering properties of samples in the small-angle and ultra-small-angle scattering range. These angles correspond to correlation lengths from several hundred nanometers up to several tens of micrometers. In this article, we present an experimental study that demonstrates the potential of quantitative neutron dark-field imaging. The dark-field signal for scattering from different particle sizes and concentrations of mono-dispersive polystyrene particles in aqueous solution is compared to theoretical predictions and the good agreement between measurements and calculations underlines the quantitative nature of the measured values and reliability of the technique with neutrons.
在中子光栅干涉测量法中，暗场图像可呈现样品在小角和超小角散射范围内的散射特性。这些角度对应着从几百纳米到几十微米的相关长度。在本文中，我们展示了一项实验研究，该研究证明了定量中子暗场成像的潜力。将水溶液中不同粒径和浓度的单分散聚苯乙烯颗粒散射的暗场信号与理论预测进行了比较，测量值与计算值之间的良好一致性突出了测量值的定量性质以及中子技术的可靠性。
