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Ce 0.1–20% doped CaF2 crystals were prepared by Tokuyama Corp., and their scintillation and optically stimulated luminescence (OSL) responses were systematically studied. In scintillation, Ce 0.1% doped sample exhibited the highest light yield while Ce 20% doped sample showed the strongest OSL intensity. Throughout this work, the complementary relation between scintillation and OSL was experimentally...
Basic radiation response properties of lithium aluminate LiAlO2 crystals activated with transition metals like Ti, Mn and Cu were examined. When X-ray excited the crystals, intense emission peaks were observed at visible wavelength regions, they are ascribed to the Ti4+ charge transfer (Ti-doped), Mn2+ 3d5-3d5 (Mn-doped) and Cu+ 3d94s-3d10 (Cu-doped) transitions. The scintillation decay times were...
Single crystalline LuF3 doped with Nd3+, Er3+, and Tm3+ were synthesized by Tokuyama Corp. aiming to apply VUV emitting scintillators. In X-ray induced radioluminescence, they exhibited VUV luminescence at 160–180 nm due to 5d-4f transitions. Among them, Nd-doped one showed the highest scintillation light yield of ∼ 1000 ph/MeV when irradiated by 137Cs γ-rays. The scintillation decay time of Nd-doped...
Single crystalline Pr 1 and 5% doped KY3F10 scintillators were fabricated by Tokuyama Corp. In photoluminescence, they showed intense Pr3+ 5d-4f transition at 300 nm under 210 nm excitation with primary decay time of few ns. In X-ray induced scintillation spectra, they also exhibited intense Pr3+ 5d-4f emission around 300 nm. Scintillation decay times of Pr 1 and 5% doped KY3F10 were 4.5 and 2.5 ns,...
Ce 0.1, 0.5, 1.0, and 2.0 mol%-doped crystals with 2 mm in diameter and 30–50 mm in length were grown by micro-pulling-down method. The photoluminescence spectra under ultraviolet excitation showed intense emission ascribed to 5d-4f transitions of replacing isolated octahedral site. In the radioluminescenced spectra under alpha-ray irradiation,...
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