DOE OSTI · 3002648
Desmearing two-dimensional small-angle neutron scattering data by central moment expansions
Abstract
Resolution smearing is a critical challenge in the quantitative analysis of two-dimensional small-angle neutron scattering (SANS) data, particularly in studies of soft-matter flow and deformation using SANS. Here, we present a central moment expansion technique to address smearing in anisotropic scattering spectra, offering a model-free desmearing methodology. By accounting for directional variations in resolution smearing and enhancing computational efficiency, this approach reconstructs desmeared intensity distributions from smeared experimental data. Computational benchmarks using interacting hard-sphere fluids and Gaussian chain models validate the accuracy of the method, while simulated noise analyses confirm its robustness under experimental conditions. Experimental validation using rheological SANS data from shear-induced micellar structures demonstrates the practicality and effectiveness of the proposed algorithm. The desmearing technique provides a powerful tool for advancing the quantitative analysis of anisotropic scattering patterns, enabling precise insights into the interplay between material microstructure and macroscopic flow behavior.
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Huang, Guan-Rong [National Tsing Hua Univ., Hsinchu (Taiwan); National Center for Theoretical Sciences (NCTS), Taipei (Taiwan)] (ORCID:0000000163939574), Tung, Chi-Huan [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000221972074), Hua, Weijian [Univ. of Nevada, Reno, NV (United States)] (ORCID:000000025083712X), Jin, Yifei [Univ. of Nevada, Reno, NV (United States)] (ORCID:0000000343361802), Porcar, Lionel [Inst. Laue-Langevin (ILL), Grenoble (France)], Shinohara, Yuya [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:000000018284751X), Wildgruber, Christoph U. [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000279433612), Do, Changwoo [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000183588417), Chen, Wei-Ren [Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)] (ORCID:0000000251920777). 2025-08-13. Desmearing two-dimensional small-angle neutron scattering data by central moment expansions. https://doi.org/10.1107/s1600576725006582
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