Figure 4 Left: asymmetric scattering of a flat scatterer (e.g. an H2O/D2O mixture) based on equation (11) in the gradient direction. Here δ0 is the position of the neutron beam away from the outer cylinder of the Couette geometry and μ is the total scattering cross section of the sample. Right: asymmetry ratio C = [I(q+) − I(q−)]/[I(q+) + I(q−)].