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Structural Evolution of Simplified Nuclear Glasses Under β-Irradiation: A Raman Spectroscopy Study

Published online by Cambridge University Press:  15 February 2011

B. Boizot,
G. Petite,
D. Ghaleb,
B. Reynard and
G. Calas
B. Boizot
Affiliation:
CEA/DSM/DRECAM, Service de Recherche sur les Surfaces et lIrradiation de la Matiére, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France, Boizot@DRECAM.cea.fr
G. Petite
Affiliation:
CEA/DSM/DRECAM, Service de Recherche sur les Surfaces et lIrradiation de la Matiére, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
D. Ghaleb
Affiliation:
CEA/DCC/DRVV, Service de Confinement des Déchets, CEA Valrho- Marcoule, BP 171, 30207 Bagnols-sur-Céze Cedex, France
B. Reynard
Affiliation:
Laboratoire de Sciences de‘a Terre, ENS Lyon, 46 allée d‘Italie 69634 Lyon Cedex 7, France
G. Calas
Affiliation:
Laboratoire de Minéralogie - Cristallographie, Universités Paris VI et VII et Institut de Physique du Globe de Paris, UMR CNRS 7590, 4 Place Jussieu, 75252 Paris Cedex 05, France
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Abstract

The ageing processes of simplified nuclear glasses under β-irradiation have been investigated on zirconium-bearing aluminoborosilicate glasses by micro Raman spectroscopy. No dose rate effect has been detected between 2.103 and 2.104 Gy/s for a 3.107 Gy integrated β dose. Important structural differences appear between the volume and the surface, with an increase of the polymerisation and a better defined danburite-like ring structure in the bulk relative to the surface. Molecular 02 is created during glass ageing, mostly close to the sample surface. Both processes indicate an important reorganisation of the glassy matrix during β-irradiation.

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