Figure 3

APT results for a low-enriched U-10Mo alloy: (a–g) 3D element distribution maps of all detected ions, U isotopes (²³⁴U, ²³⁵U, ²³⁸U), Mo, C, and Si across a LEU-10Mo/UC interface, which is indicated by the black arrow in (a). Full mass spectra (0–150 Da) for (h) γ-UMo matrix and (j) 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 (i) and UC phases (k). Mass spectra shown in (h–k) are for a 0.1 nm fixed bin width.