Comparative Studies of Scintillation Properties of Tl-based Crystals

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Nd-doped GdVO 4 single crystals were synthesized and their photoluminescence and scintillation properties were evaluated. The Nd-doped samples showed scintillation due to the 4f-4f transitions of Nd 3+ with peaks at around 900, 1060, and 1320 nm. In addition, we evaluated the relationship between the scintillation signal intensity and the X-ray exposure dose rate for dosimetric application. All the Nd-doped samples demonstrated high sensitivity with a dynamic range from 0.006 to 60 Gy/h.

Section: Introductionmentioning

confidence: 99%

X-ray-induced Luminescence Properties of Nd-doped GdVO4

Akatsuka¹,

Kimura²,

Onoda³

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.

“…In most applications, a single-crystalline form has been used for X-and γ-ray detection because the interaction probability is dependent on the volume and density of the scintillator, so most of the recent papers on scintillators have been for single-crystalline forms. (20)(21)(22)(23) Although the scintillation properties of undoped GdTaO 4 single crystals have been recently reported, (24,25) there is still room for research on the performance of rare-earth-doped GdTaO 4 single crystals. Previously, we prepared rare-earth-doped GdTaO 4 bulk crystals and investigated their scintillation properties.…”

Section: Introductionmentioning

confidence: 99%

Photoluminescence and Scintillation Properties of Tb:GdTaO4 Crystals

Nakauchi¹,

Kato²,

Kawaguchi³

et al. 2021

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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.