Scintillation and dosimetric properties of Eu-doped SrCO&lt;sub&gt;3&lt;/sub&gt; ceramics prepared by spark plasma sintering method

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The optical and optically stimulated luminescence (OSL) properties of Ce-doped 20CsCl-20CaCl 2 -60ZnCl 2 (CCZ) glasses were evaluated. All the Ce-doped CCZ glasses showed a broad emission peak at 370 nm upon excitation at 320 nm, and the decay time suggested that the origin was the 5d-4f transitions of Ce 3+ . After X-ray irradiation, the Ce-doped CCZ glasses showed OSL around 370 nm under stimulation at 400 nm. All the glasses exhibited dose response functions with good linearity in the dynamic range of 0.1-10 Gy.

Section: Introductionmentioning

confidence: 99%

Optical and Optically Stimulated Luminescence Properties of Ce-doped CsCl–CaCl2–ZnCl2 Glasses

Ito¹,

Kimura²,

Shiratori³

et al. 2022

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“…Such behavior can be observed in some material systems reported elsewhere. (41)(42)(43)(44) Figure 7 shows the pulse height of γ-rays (662 keV) from 137 Cs measured by using the Tb:GdTaO 4 samples. Although all the samples show significant signals due to γ-rays, a photoabsorption peak cannot be clearly distinguished from Compton signals because of the long decay time of sub-millisecond order.…”

Section: Resultsmentioning

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.

“…The decay time curves are also composed of an exponential function, where the decay time constants are close to the typical decay time constant of the 4f-4f transitions of Eu 3+ . (28,29) Figure 6 shows the X-ray-induced RL spectra. The Eu:CaAl 2 O 4 crystals show RL predominantly with a broad emission band peaking around 440 nm as well as weak peaks around 600 nm.…”

Section: Methodsmentioning

confidence: 99%

Luminescence and Scintillation Properties of Eu-doped CaAl2O4 Bulk Crystals

Nakauchi¹,

Kawaguchi²,

Yanagida³

2019

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Eu-doped CaAl 2 O 4 bulk crystals were synthesized by the floating zone (FZ) method, and their photoluminescence (PL) and scintillation properties were investigated firstly in a bulk crystal. The crystal samples exhibit PL and radioluminescence (RL) with a broad emission peaking around 440 nm as well as sharp peaks appearing around 600 nm, which are similarly observed for powder samples. Suggested from the decay time constants, they are attributed to the 5d-4f transitions of Eu 2+ and the 4f-4f transitions of Eu 3+ , respectively. From the pulse height spectrum under 241 Am γ-ray (59.5 keV) exposure, the light yield (LY) of a 3.0% Eu:CaAl 2 O 4 bulk crystal is approximately 12000 ph/MeV.