Figure 4
(a) Orthogonal cuts through the reconstructed δ volume measured at off-resonant energy. The dashed lines indicate the positions of the cuts. (b,c) Histograms of the δ values of the reconstructed volume at two different energies. The peak around 0 corresponds to the air around the sample, the peak around 2 × 10−5, which shifts with energy, corresponds to Ni, and the peak around 3.75 × 10−5 [zoom in (c)] corresponds to a deposit on the Ni wire. |