Abstract
BaBr2:Eu (0.5 mol%) translucent ceramic has been synthesized using spark plasma sintering, and then the optical, scintillation and optically-stimulated luminescence (OSL) properties have been investigated. To evaluate the potential of translucent ceramics, BaBr2:Eu (0.5 mol%) single crystal has been grown by the vertical Bridgman–Stockbarger method for the comparison. When the thickness of the crystal and ceramic samples were fixed to approximately 0.5 mm, both the samples showed translucency in the visible light range. In the scintillation spectra, both the samples showed two emission peaks at around 400 and 500 nm, and the origin of the emissions were the 5d–4f transitions of Eu2+ and the F-VK center recombination, respectively. Regarding the OSL properties after x-ray irradiation, the OSL spectra of the samples showed an emission band peaking at around 400 nm, and the detection limit of the crystal and ceramic samples were 1 and 10 mGy, respectively.
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