Scintillation Properties of Ti- and Zr-doped Gd2Hf2O7 Crystals

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Tb-doped GdTaO 4 crystals were synthesized to investigate their photoluminescence and scintillation properties. Tb:GdTaO 4 exhibits photo-and radioluminescence characterized by several sharp peaks due to 4f-4f transitions of Tb 3+ . The photo-and radioluminescence decay time constants are 500-900 μs. The values become short with increasing Tb concentration and are typical for the 4f-4f transitions of Tb 3+ . From the quantum yield (QY), radioluminescence spectra, and pulse height under 137 Cs γ-rays, the 1% Tb:GdTaO 4 crystal shows the highest scintillation output among the samples.

Section: Methodsmentioning

confidence: 99%

Photoluminescence and Scintillation Properties of Tb:GdTaO4 Crystals

Nakauchi¹,

Kato²,

Kawaguchi³

et al. 2021

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“…Many inorganic materials have also been investigated as novel scintillators. (11)(12)(13)(14)(15) In recent years, with the development of near-infrared (NIR) photodetectors, NIR-emitting scintillators have been studied. (16)(17)(18)(19)(20) NIR-emitting scintillators are expected to be used in biomedical imaging (21) and dose monitoring in nuclear power plants.…”

Section: Introductionmentioning

confidence: 99%

Optical and Scintillation Properties of Nd-doped Strontium Yttrate Single Crystals

Fukushima¹,

Akatsuka²,

Kimura³

et al. 2021

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Nd:SrY 2 O 4 single crystals were successfully synthesized by the floating zone method, and their photoluminescence (PL) and scintillation properties were investigated. The X-ray diffraction patterns of synthesized Nd:SrY 2 O 4 demonstrate no impurity phase. Under X-ray irradiation, the samples show scintillation with sharp emission lines at around 900, 1064, and 1300 nm due to the 4f-4f transitions of Nd 3+ . The PL and scintillation decay time constants were approximately 170-180 and 200-270 μs, respectively. The scintillation intensity was proportional to the X-ray dose exposure in the dynamic range from 0.06 to 60 Gy/h.

“…There have been many studies on the properties of scintillators and dosimetric materials in the last several decades, (2)(3)(4)(5)(6)12) and research on both types of phosphor materials is still an attractive topic. As recent studies on scintillators and dosimetric materials, single crystals, (19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30)(31) sintered ceramics, (32)(33)(34)(35)(36)(37) glasses, (38)(39)(40)(41)(42)(43) eutectics, (44,45) plastics, (46) and organic-inorganic hybrid materials (47) have been reported. Among them, glass materials have the advantages of high transparency, formability, and chemical stability.…”

Section: Introductionmentioning

confidence: 99%

Scintillation Properties of Non-doped and Pr-doped BaO–B2O3–SiO2 Glasses and Glass-ceramics

Kawaguchi¹,

Masai²,

Akatsuka³

et al. 2021

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We have studied the scintillation properties of non-doped and Pr-doped BaO-B 2 O 3 -SiO 2 glasses and glass-ceramics. The glass transition temperature (T g ), the temperature of crystallization onset (T x ), and the crystallization peak (T p ) were determined by differential thermal analysis. The glass-ceramics were obtained by heating at three different temperatures (T g + 50 °C, T x , and T p ). We confirmed that the X-ray diffraction peaks can be ascribed to the BaSiO 3 crystalline phase in the glass-ceramic samples. In the X-ray-induced scintillation spectra, we observed the intrinsic luminescence of the host glass and luminescence due to the 4f-4f transition of Pr 3+ ions. In addition, the 1% Pr-doped BaO-B 2 O 3 -SiO 2 glass-ceramic with heating at T g + 50 °C clearly showed luminescence in the wavelength range from 250 to 350 nm under X-ray excitation. Its photoluminescence (PL) decay time was estimated to be 26.28 ns and its luminescence is considered to be due to the 5f-4f transition of Pr 3+ ions.