Abstract
The influence of the chemical composition on the photostimulated luminescence (PSL) and thermoluminescence (TL) properties of BaFBr-Eu 2+ are investigated. It is shown that incorporating an excess of F − in BaFBr-Eu 2+ causes a change in the type of F centres that are created by X-ray irradiation, which is most clearly observed in the thermoluminescence spectra. An analysis of the TL peaks that can be assigned to F(Br −) and F(F −) centres is reported. The best PSL properties are obtained for samples with fluorine excess and in which Ba 2+ is partially replaced by Sr 2+.
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