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Radiation effects in nuclear materials: Role of nuclear and electronic energy losses and their synergy

Abstract : Ceramic oxides and carbides are promising matrices for the immobilization and/or transmutation of nuclear wastes, cladding materials for gas-cooled fission reactors and structural components for fusion reactors. For these applications there is a need of fundamental data concerning the behavior of nuclear ceramics upon irradiation. This article is focused on the presentation of a few remarkable examples regarding ion-beam modifications of nuclear ceramics with an emphasis on the mechanisms leading to damage creation and phase transformations. Results obtained by combining advanced techniques (Rutherford backscattering spectrometry and channeling, X-ray diffraction, transmission electron microscopy, Raman spectroscopy) concern irradiations in a broad energy range (from key to GeV) with the aim of exploring both nuclear collision (S-n) and electronic excitation (S-e) regimes. Finally, the daunting challenge of the demonstration of the existence of synergistic effects between S-n and S-e is tackled by discussing the healing due to intense electronic energy deposition (SHIBIEC) and by reporting results recently obtained in dual-beam irradiation (DBI) experiments. (C) 2013 Elsevier B.V. All rights reserved.
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Submitted on : Wednesday, August 21, 2013 - 2:40:56 PM
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L. Thome, A. Debelle, G. Garrido, S. Mylonas, B. Decamps, et al.. Radiation effects in nuclear materials: Role of nuclear and electronic energy losses and their synergy. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier, 2013, 307, pp.43-48. ⟨10.1016/j.nimb.2012.11.077⟩. ⟨in2p3-00852790⟩



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