We grew 0.1, 0.5, and 1% Tm-doped Bi 4 Ge 3 O 12 single crystals by the floating zone method. Their photoluminescence and scintillation properties were investigated in the range from visible to near-IR. Luminescence spectra and decay times consistent with the transitions of Tm 3+ were confirmed. X-ray-irradiated dose rate response properties were evaluated using the prepared samples and an InGaAs photodiode. The 1% Tm-doped sample showed the widest dynamic range (0.03-60 Gy/h) among the prepared samples.
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Okazaki et al. (2023) studied this question.
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