Investigation of the thermal decomposition of Pu(IV) oxalate: a transmission electron microscopy study

Autor: Edgar C. Buck, Dallas D. Reilly, Luke E. Sweet, Aaron D. Nicholas, Forrest D. Heller, Gabriel B. Hall, Richard A. Clark, Amanda J. Casella
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Frontiers in Nuclear Engineering, Vol 3 (2024)
Druh dokumentu: article
ISSN: 2813-3412
DOI: 10.3389/fnuen.2024.1380137
Popis: The degradation of the internal structure of plutonium (IV) oxalate during calcination was investigated with Transmission Electron Microscopy (TEM), electron diffraction, Electron Energy-Loss Spectroscopy (EELS), and 4D Scanning TEM (STEM). TEM lift-outs were prepared from samples that had been calcined at 300°C, 450°C, 650°C and 950°C. The resulting phase at all calcination temperatures was identified as PuO2 with electron diffraction. The grain size range was obtained with high-resolution TEM. In addition, 4D STEM images were analyzed to provide grain size distributions. In the 300°C calcined sample, the grains were
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