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.
PRIEUR Damien;
VIGIER Jean-Francois;
WISS Thierry;
JANSSEN Arne;
ROTHE J.;
CAMBRIANI Andrea;
SOMERS Joseph;
2014-03-07
ACADEMIC PRESS INC ELSEVIER SCIENCE
JRC84865
0022-4596,
http://www.sciencedirect.com/science/article/pii/S0022459613006038,
https://publications.jrc.ec.europa.eu/repository/handle/JRC84865,
10.1016/j.jssc.2013.12.016,
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