Measured time-dependent neutron scattering intensities. (a) Black squares indicate the intensity of the peaks near the beamstop (see Fig. 4), and the solid line shows the result after a one-dimensional Fourier analysis truncated at |N| = 1. (b) Black and open squares indicate SANS at Q = 0.044 and 0.055 Å−1, respectively, and the lines present the time-dependent intensities after a one-dimensional Fourier analysis terminated at |N| = 1; the dashed line refers to the open symbols. The relative changes in the intensities in parts (a) and (b) are 7.0 × 10−4 and 4.0 × 10−4, respectively. The units of intensity in part (b) are as in Fig. 5.