Contrast variation in small-angle scattering

Contrast variation in small-angle neutron and X-ray scattering

Scattering intensity as a function of the Q for water-in-oil microemulsions calculated for SANS shown on the left and SAXS shown on the right. For the three SANS curves measured, the dark grey regions are deuterated water (D2O) or deuterated oil, and the light grey regions are standard water (H2O) or oil. For drop contrast (red), you detect surfactant and water. For core contrast (blue), you detect water only. For shell contrast (green), you detect surfactant only. For the SAXS curve (purple), the contrast is fixed, and the water core dominates.

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