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Influence of external β-irradiation in oxide glasses

Abstract : Radiation effects in oxide glass as external β-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 β-irradiation, electron-trapping processes on Cr6+ occurred, forming Cr4+ and Cr5+ species.
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Submitted on : Wednesday, November 26, 2014 - 9:53:15 AM
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Nadège Ollier, Bernard Champagnon, Bruno Boizot, Gérard Panczer, B. Padlyak. Influence of external β-irradiation in oxide glasses. Journal of Non-Crystalline Solids, Elsevier, 2003, 323 (1-3), pp.200-206. ⟨10.1016/S0022-3093(03)00307-7⟩. ⟨hal-01087409⟩



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