Abstract
We synthesized the Nd-doped Bi4Ge3O12 (BGO) single crystals with different concentrations of Nd (0.1, 0.5, and 1%) by the floating zone method and evaluated the photoluminescence (PL) and scintillation properties. In both the PL and scintillation spectra, intrinsic luminescence of BGO was observed at 400–600 nm. In addition, emission peaks due to the 4f–4f transitions of Nd3+ were observed in the near-infrared range. The 0.5% Nd-doped sample indicated the highest quantum yield of 42.9% among the samples. All the samples showed good linearity between X-ray exposure dose rate and the emission intensity in the NIR range. The lowest detectable dose rates were 0.06 Gy/h in the 0.1 and 1% Nd-doped BGO samples, and that of the 0.5% Nd-doped BGO sample was 0.01 Gy/h.
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Acknowledgements
This work was supported by Grant-in-Aid for Scientific Research B (19H03533, 21H03733, and 21H03736), and Early-Career Scientists (20K20104) from Japanese Society of Applied Physics (JSPS). Foundation from JST A-STEP (JPMJTM20FP), Cooperative Research Project of Research Center for Biomedical Engineering, and Nippon Sheet Glass Foundation, SEI Group CSR Foundation, TEPCO Memorial Foundation, and KRF Foundation, Murata Science Foundation are also acknowledged.
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Okazaki, K., Onoda, D., Fukushima, H. et al. Characterization of scintillation properties of Nd-doped Bi4Ge3O12 single crystals with near-infrared luminescence. J Mater Sci: Mater Electron 32, 21677–21684 (2021). https://doi.org/10.1007/s10854-021-06686-9
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DOI: https://doi.org/10.1007/s10854-021-06686-9