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|Title:||Structural investigation of self-irradiation damaged AmO2|
|Authors:||PRIEUR DAMIEN; VIGIER JEAN-FRANCOIS; WISS Thierry; JANSSEN Arne; ROTHE J.; CAMBRIANI ANDREA; SOMERS Joseph|
|Citation:||JOURNAL OF SOLID STATE CHEMISTRY vol. 212 p. 7-12|
|Publisher:||ACADEMIC PRESS INC ELSEVIER SCIENCE|
|Type:||Articles in periodicals and books|
|Abstract:||Studying self-irradiated materials is an ideal means to investigate the effect of the damages on material structure and to better understand the behaviour of irradiated nuclear fuels. In this context, X-ray diffraction, X-ray absorption spectroscopy and transmission electron microscopy have been used to investigate self-irradiation damaged AmO2. Combining these techniques allows studying the microstructure and the variation of the fluorite structure at both short-range and long-range order. Thus, the increase of both interatomic distances and lattice parameter was shown, as well as the presence of nanometer sized He bubbles. As confirmed by the observed high-level of crytallinity, the fluorite structure exhibits a high radiation tolerance, which is confirmed by the low increase of the lattice parameter. This could be explained by a self-annealing mechanism of the created defects at room temperature.|
|JRC Directorate:||Nuclear Safety and Security|
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