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Article Dans Une Revue (Data Paper) Journal of Cultural Heritage Année : 2023

Spectroscopic investigation of historical uranium glasses

Résumé

We present spectroscopic investigations of uranium in two historical glasses. A 1920′s-1930′s Art Deco (Bagley Carnival) green soda-lime-silica uranium glass bowl and a 1930′s-1940′s (Thomas Webb) yellow full lead crystal uranium glass vase were studied using optical absorption spectroscopy, XRF and SEM- EDX, X-band EPR and High- Energy Resolution Fluorescence-Detected (HERFD)-XANES. Uranium specia- tion may be different in the two glasses. Uranium occurs as uranyl groups (UO22+) with minority reduced uranium species, mostly as U(V), more important in the Webb glass than in the Bagley glass. The differ- ences between the two glasses arise from the fining procedure and result from the presence of other multivalent elements and differences in base glass composition. Electron Paramagnetic Resonance (EPR) spectra show the presence of an incipient signal close to g∼2, partially annealed by heating to 550 °C, which we assign to a small concentration of radiation-induced defects caused by uranium decay. The presence of multivalent glass components in addition to U (As + Cu + Fe in the Bagley glass and Sb + Fe in the Webb glass) can trap the electron-hole pairs generated by the presence of uranium. This may ex- plain the weakness of this signal in these glasses that anyway received a limited radiation dose since their fabrication. The low activity of these glasses, close to the background radiation, confirms that there is no danger to exhibiting them in museums.

Dates et versions

hal-03951493 , version 1 (23-01-2023)

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Citer

Georges Calas, Laurence Galoisy, Myrtille O.J.Y. Hunault, Prince Rautiyal, Katrina Skerratt-Love, et al.. Spectroscopic investigation of historical uranium glasses. Journal of Cultural Heritage, 2023, 59 (1), pp.93-101. ⟨10.1016/j.culher.2022.11.008⟩. ⟨hal-03951493⟩
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