1. Synthesis and characterization of nanocrystalline U$_{1-x}$Pu$_{x}$O$_{2(+y)}$ mixed oxides
- Author
-
Kauric, G., Walter, O., Beck, A., Schacherl, B., Dieste Blanco, O., Vigier, J.-F., Zuleger, E., Vitova, T., and Popa, K.
- Subjects
Hydrothermal decomposition ,Oxide nuclear fuel ,Technology ,Oxalate ,Uranium ,HR-XANES ,ddc:600 ,Plutonium - Abstract
We report here the first synthesis of mixed oxide U$_{1-x}$Pu$_{x}$O$_{2(+y)}$ nanoparticles. The obtained nanopowders were characterized by X-ray diffraction, thermal ionization mass spectrometry, transmission electron microscopy, Raman spectroscopy, and U M$_{4}$ edge high-energy-resolution X-ray absorption near edge structure (HR-XANES). The HR-XANES spectra give evidence for the partial oxidation of U$^{IV}$ to U$^{V}$. This novel route toward the formation of actinide–actinide solid solution opens research opportunities that are not accessible using bulk materials. We give details on the X-ray diffraction study on plutonium oxalate hexahydrate, as a reagent for the synthesis of such nanoparticles.
- Published
- 2020