Optical and scintillation properties of Tb-doped apatite single crystals
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In the present study, we focus on the Tb-doped Sr-based apatite materials which have a chemical composition of Sr2RE8(SiO4)6O2 where RE denotes the rare earth element. The target materials in this study were Tb 0.5% doped Sr2Gd8(SiO4)6O2, Sr2Y8(SiO4)6O2, Sr2(Gd0.5Lu0.5)8(SiO4)6O2 and Sr2(Gd0.4Lu0.6)8(SiO4)6O2 crystals, and they were synthesized by the floating zone method. When we checked powder X-ray diffraction patter, we confirmed a single phase (JCPDS No:280212) for all the samples. In photoluminescence (PL) and X-ray induced scintillation spectra, some sharp emission lines appeared, and the emission origin was Tb3+ 4f-4f transition. We investigated PL and scintillation decay time profiles, and the main component was 1.8 and 1.3 ms, respectively. Among the samples prepared here, Sr2Gd8(SiO4)6O2 showed the highest scintillation intensity.
Abstract
In the present study, we focus on the Tb-doped Sr-based apatite materials which have a chemical composition of Sr2RE8(SiO4)6O2 where RE denotes the rare earth element. The target materials in this study were Tb 0.5% doped Sr2Gd8(SiO4)6O2, Sr2Y8(SiO4)6O2, Sr2(Gd0.5Lu0.5)8(SiO4)6O2 and Sr2(Gd0.4Lu0.6)8(SiO4)6O2 crystals, and they were synthesized by the floating zone method. When we checked powder X-ray diffraction patter, we confirmed a single phase (JCPDS No:280212) for all the samples. In photoluminescence (PL) and X-ray induced scintillation spectra, some sharp emission lines appeared, and the emission origin was Tb3+ 4f-4f transition. We investigated PL and scintillation decay time profiles, and the main component was 1.8 and 1.3 ms, respectively. Among the samples prepared here, Sr2Gd8(SiO4)6O2 showed the highest scintillation intensity.
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