Figure 1
From: The nature of Pu-bearing particles from the Maralinga nuclear testing site, Australia

X-ray µ-tomography (a,d,e) and µSXRF imaging (b–c, f–i) of hot particles from Maralinga. In (a) (Potatohead) the low-X-ray cross-section areas within the particles (black) correspond to pores, whereas in (d) and (e) (Bruce) they correspond to Al-oxide rich domains. Potatohead displays a U-rich grain (purple circle in a,b,c) attached on the outside of the particle; in (e), a U-rich, Pu-poor inclusion is highlighted in yellow.