Journal
JOURNAL OF NON-CRYSTALLINE SOLIDS
Volume 323, Issue 1-3, Pages 200-206Publisher
ELSEVIER
DOI: 10.1016/S0022-3093(03)00307-7
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Radiation effects in oxide glass as external P-irradiation has been investigated by Raman spectroscopy, Cr3+ luminescence and EPR spectroscopy to analyze microstructure evolution. Comparison between simplified and complex glasses (high-level nuclear waste glass analogue) was undertaken. Migration and segregation of sodium have been confirmed on simplified irradiated glasses by a polymerization increase and dissolved oxygen presence. Densification under irradiation has also been demonstrated with the increase of three-membered silicate rings in silicate glass and the decrease of the average Si-O-Si angle in the borosilicate glass. In both glasses, Cr3+ crystal field was increased, suggesting a Cr-O length decrease. The complex borosilicate glass responds differently: densification effect and Na segregation were not detected. Under beta-irradiation, electron-trapping processes on Cr6+ occurred, forming Cr4+ and Cr5+ species. (C) 2003 Elsevier B.V. All rights reserved.
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