Abstract
Spin-echo small-angle neutron scattering (SESANS) is an efficient method to measure particle sizes in real-space, because it eliminates the need for strong collimation of the beam. The fact that the information is in real-space gives some interesting differences with conventional SANS, which is discussed with measurements of the phase transition in a colloidal system from gas via liquid to solid. Structures can be determined over three orders of magnitude in length scale, from 10 nm to 10 μm . We show the results with two different methods to realise SESANS: with π-flipping foils for a steady source with a monochromatised beam and with the neutron spin resonance echo method for a white pulsed source.
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