Defects induced by electron irradiation in hollandite ceramics, specific radioactive cesium-host wasteforms: a 57Fe Mössbauer study |
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| Authors: | N Nguyen A Ducouret F Studer V Aubin D Caurant D Gourier J-M Costantini |
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| Institution: | (1) CRISMAT (CNRS-UMR 6508), ENSICAEN, 6, bd du Maréchal Juin, F-14050 Caen cedex, France;(2) LCAES (CNRS UMR 7574), 11, rue Pierre et Marie Curie, 75231 Paris, France;(3) CEA/DMN/SRMA, 91191 Gif sur Yvette, Paris, France |
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| Abstract: | Several single phase hollandite ceramics having Ba2+ x Cs+ y (C = Al,Fe)3+ 2x+y Ti4+ 8?2x?y O16 composition have been synthesized and irradiated under external electron beams simulating the β-irradiation of radioactive cesium. These samples have been characterized by 57Fe transmission Mössbauer spectroscopy. Mössbauer results show that the irradiation modifies the local arrangements of Ba cations around Fe3+ ions by atomic displacement of Ba ions. |
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| Keywords: | M?ssbauer spectroscopy atomic displacement high level radioactive wastes |
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