Eu2O3-doped tellurite glasses (15WO3–5Al2O3–80TeO2) were fabricated and their scintillation characteristics were investigated. Typical emissions originating from the 4f→4f transitions of Eu3+ were ...observed at 580, 592, 614, 653, and 702 nm when irradiated with visible light. The quantum yield of the Eu2O3-doped glass increased as the Eu2O3 concentration increased, and the 5.0% Eu2O3-doped glass exhibited the largest quantum yield of 76%. Further, scintillation originating from the 4f→4f transition of Eu3+ was also detected under X-ray irradiation, and the integrated scintillation intensity depended on the quantum yield. The afterglow levels of the glasses decreased with increasing the Eu2O3 concentration, and the level of the 5.0% Eu2O3-doped glass was 193 ppm, which was close to that of the Tl-doped CsI.
•Eu2O3-doped tellurite glasses were synthesized by melt-quenching method.•Photoluminescence and scintillation due to the 4f-4f transitions of Eu3+ were observed.•The afterglow levels of the Eu2O3-doped tellurite glasses were 193–553 ppm.
We synthesized the Nd-doped Bi
4
Ge
3
O
12
(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 Nd
3+
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.
Photoluminescence and thermally-stimulated luminescence (TSL) characteristics of BaCaBO3F doped with various amounts of Tm were evaluated. The Tm-doped BaCaBO3F showed an emission with a sharp peak ...around 460 nm originating from the 4f-4f transition of Tm3+ in photoluminescence and scintillation. Their photoluminescence and scintillation decay times for the Tm-doped BaCaBO3F were 0.68–0.73 and 1.28–1.55 ms, respectively. Furthermore, the TSL dynamic range of the glow peaks at 190 °C for the 0.5% Tm-doped BaCaBO3F was from 0.1 mGy to 1000 mGy. Furthermore, the TSL isothermal analysis of the Tm-doped BaCaBO3F suggested that at least 12 different activation energies related to TSL were confirmed.
•Tm-doped BaCaBO3F was fabricated by the conventional solid-state reaction.•Tm-doped BaCaBO3F showed efficient TSL with several glow peaks.•Linear TSL dose response was confirmed to be in the dose range from 0.1 to 1000 mGy.
(C
6
H
5
C
2
H
4
NH
3
)
2
Pb
1−
x
Zn
x
Br
4
(
x
= 0.05, 0.1, and 0.25) single crystals were fabricated as a two-dimensional quantum-confined scintillator by the poor-solvent diffusion method. In the ...photoluminescence (PL) emission map, two emission peaks due to the excitons in the inorganic layer were observed at around 410 and 440 nm. The PL quantum yields of
x
= 0.05, 0.1, and 0.25 samples were 21.7, 25.3, and 21.0% with typical errors of ± 2%, respectively. By measuring scintillation spectra under X-ray irradiation, the emission peak due to free excitons can be observed at around 440 nm. According to the pulse-height spectra under
137
Cs γ-ray (662 keV) irradiation, the light yields of
x
= 0.05, 0.1, and 0.25 samples were about 15,100, 17,800, and 14,100 ph/MeV with experimental error of ± 10%, respectively.
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