Abstract
Nominally pure and Dy-doped BaF2 crystals were investigated concerning their optical absorption (OA) and thermoluminescence (TL) properties. Peaks at 120—150 and 200°C were observed for a heating rate of 1.7°C/s. The TL response for γ-rays and the TL emission spectra were obtained for these peaks. Except for the purest crystal, all BaF2 crystals produced OA bands before irradiation typical of Ce3+ ions. After irradiation, Dy doped crystals showed bands due to Dy2+ ions. A nominally pure sample gave bands related to Ce2+ ions and photochromic centers of Ce3+ ions. and photochromic centres of Ce3+ ions. The correlation between some OA bands and TL peaks is discussed.
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