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Figure 5
(a) Bivariate histogram of the δoff and δon values of a region in the center of the Ni wire and projected histograms. While the δoff histogram has a Gaussian shape, the δon histogram is better described by combining two Gaussian curves. This behavior indicates the contamination of the Ni wire with a material that has a similar δoff but a different δon value. The voxels with this combination of δ values are indicated by the rectangle in the bivariate histogram. The localization of these voxels in the sample volume is shown in (b).

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SYNCHROTRON
RADIATION
ISSN: 1600-5775
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