Chemical alteration of 238Pu-loaded borosilicate glass under saturated leaching conditions
| Autor: | V. O. Yapaskurt, Andrei A. Shiryaev, Bella Yu. Zubekhina, Alexey A. Averin, Irina E. Vlasova, Vladimir G. Petrov, Boris E. Burakov |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Photoluminescence Chemistry Borosilicate glass Inorganic chemistry 02 engineering and technology Radioluminescence 021001 nanoscience & nanotechnology 01 natural sciences symbols.namesake 0103 physical sciences Radiolysis symbols Leaching (metallurgy) Physical and Theoretical Chemistry 0210 nano-technology Raman spectroscopy |
| Zdroj: | Radiochimica Acta. 108:19-27 |
| ISSN: | 2193-3405 0033-8230 |
| DOI: | 10.1515/ract-2018-3097 |
| Popis: | Highly radioactive 238Pu-doped and non-radioactive samples of borosilicate glass with chemical compositions and synthesis routine similar to SON68 glass were studied under static saturated leaching conditions in distilled water at 90 °C. Dramatic differences in behavior of the radioactive and model glasses were observed. On time scale of 4 months the radioactive glass is fully covered by mechanically unstable alteration layer, possibly consisting of aluminum hydroxides with small fraction of a separate secondary Pu bearing phase. The model glass remains virtually pristine. Addition of Eu3+ into the glass allowed examination of the glass radio- and photoluminescence and to assess changes or REE3+ impurity local environment during self-irradiation and leaching. Photoluminescence spectra suggest more ordered local environment of europium ions in the alteration “gel” than in the bulk glass. Peculiar behavior of the photoluminescence spectra excited at different laser power is observed for the alteration layer and is ascribed to optical bleaching of color centers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|