Figure 2

APT results for a depleted U-10Mo alloy: (a–f) 3D element distribution maps of all detected ions, U isotopes (²³⁵U, ²³⁸U), Mo, C, and Si across a DU-10Mo/UC interface, which is indicated by the black arrow in (a). Full mass spectra (0–150 Da) for (g) γ-UMo matrix and (i) UC phase. Specific region of the mass spectra between 76 and 82 Da showing the U³⁺ peaks used for isotopic abundance calculations for the γ-UMo matrix (h) and UC phases (j). Mass spectra shown in (g–j) are for a 0.1 nm fixed bin width.