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Abstract

X-ray absorption spectroscopy experiments were performed on a set of uranium dioxide samples implanted with 10{17} xenon cm{-2} at 800 keV (8 at.% at 140 nm). EXAFS measurements performed at 12 K showed that during implantation the gas forms highly pressurised nanometre size inclusions. Bubble pressures were estimated at 2.8 +/- 0.3 GPa at low temperature. Following the low energy xenon implantation, samples were annealed between 1073 and 1773 K for several hours. Stability of nanometre size highly pressurized xenon aggregates in UO(2) is demonstrated up to 1073 K as for this temperature almost no modification of the xenon environment was observed. Above this temperature, bubbles will trap migrating vacancies and their inner pressure is seen to decrease substantially.

Additional information

Authors: MARTIN P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);GARCIA P, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);CARLOT G, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);SABATHIER C, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);VALOT C, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR);NASSIF V, CEA Grenoble, DSM/DRFMC/SP2M/NRS, Grenoble (FR);PROUX O, CEA Grenoble, DSM/DRFMC/SP2M/NRS, Grenoble (FR);HAZEMANN J-L, Laboratoire de Géophysique Interne et Tectonophysique, UMR CNRS/Université Joseph Fourier, Saint-Martin-D'Hères (FR)
Bibliographic Reference: An article published in: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Volume 266, Issues 12-13 (2008), 5 pp.
Availability: This article can be accessed online by subscribers, and can be ordered online by non-subscribers, at: http://dx.doi.org/doi:10.1016/j.nimb.2008.03.180
Record Number: 200819865 / Last updated on: 2008-06-24
Category: PUBLICATION
Original language: en
Available languages: en
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