A neutron-scattering technique using small momentum transfer to probe larger-scale structure. Contrast, background subtraction and the measured wave-number range determine which structural parameters can be inferred.
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Small-angle neutron scattering (SANS) is a powerful experimental technique used to investigate the structure of materials at the nanoscale. It involves the scattering of neutrons from a sample, where the angles of scattering are small (typically less than a few degrees). This technique is particularly sensitive to the size, shape, and distribution of structures on the order of 1 to 100 nanometers.