HAL : in2p3-00185528, version 1
 Consequences of external irradiation on the chemical durability of the $\beta$-thorium phosphate-diphosphate during leaching testsTamain C., Özgümüs A., Dacheux N., Garrido F., Thomé L. et alJournal of Radioanalytical and Nuclear Chemistry 273 (2007) 597-601 - http://hal.in2p3.fr/in2p3-00185528
Physique/Matière Condensée/Science des matériaux
Consequences of external irradiation on the chemical durability of the $\beta$-thorium phosphate-diphosphate during leaching tests
C. Tamain1, A. Özgümüs ()1, N. Dacheux1, F. Garrido2, L. Thomé2, C. Corbel3, E. Mendès3
 1 : IPNO - Institut de Physique Nucléaire d'Orsay http://ipnweb.in2p3.fr CNRS : UMR8608 – IN2P3 – Université Paris XI - Paris Sud IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX France 2 : CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse http://www-csnsm.in2p3.fr/ CNRS : UMR8609 – IN2P3 – Université Paris XI - Paris Sud batiments 104 et 108 - 91405 Orsay Campus France 3 : LSI - UMR 7642 - Laboratoire des Solides Irradiés http://www.lsi.polytechnique.fr CNRS : UMR7642 – Polytechnique - X – CEA : DSM/IRAMIS LSI - UMR 7642, 28 route de Saclay, F-91128 Palaiseau Cedex France
The effect of external irradiation on $\beta$-thorium phosphate-diphosphate (tetravalent actini des bearing storage matrix) and the influence on its dissolution in aqueous media were studied. Highly energetic heavy ions were used to get the amorphization of the crystalline structure of the ceramic. The ex-situ dissolution expenments showed an increase of the dissolution versus amorphous fraction in several pH and temperature conditions. The in-situ dissolution experiments highlighted the primordial importance of radiolytic produced free radical species. From these results, the ceramic presents a good resistance to aqueous alteration even in amorphous state.

Articles dans des revues avec comité de lecture
2007