Charge conversion of uranium ions in CaF2 |
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Authors: | SV Nistor I Ursu |
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Institution: | Centrul National de Fizicǎ, C.P. 5206, Bucure?ti, RomâniaItaly |
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Abstract: | Single crystals of CaF2 doped with uranium ions exhibiting a light red colour have been grown in an inert atmosphere. ESR spectra belonging to U3+ centers unstable at room temperature could be observed only after UV-irradiation at liquid nitrogen temperature. The formation and annealing of these centers as well as the optical absorption date indicate that a new charge conversion mechanism is effective in such crystals. |
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