Figure 4
From: Atomic-scale Studies of Uranium Oxidation and Corrosion by Water Vapour

Comparison of the mass spectra (in log scale) magnified to concentrate on the U2+ ion and its respective hydrides and deuterides summed across the entire specimen for (a) the depleted uranium sample exposed to air under ambient conditions for one hour as shown in Fig. 1(b) the uranium sample exposed to D2O vapour as shown in Fig. 5.