Optical, TSL, and OSL Properties of Copper-doped Cesium Bromide Transparent Ceramics Prepared by SPS

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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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“…Prior research revealed that typical Cu-doped phosphors have two decay time constants of microsecond order due to the 3d 9 4s 1 -3d 10 transition of Cu + ions. (23)(24)(25)(26) In our measurements, such values were obtained for the PL decay curves monitored at 490 nm. Thus, we assigned the origin of the 490 nm peak to the 3d 9 4s 1 -3d 10 transition of Cu + ions.…”

Section: Resultsmentioning

confidence: 99%

TSL and OSL Properties of Cu-doped CaF2 Ceramics Prepared by Spark Plasma Sintering

Kato¹,

Nakauchi²,

Kawaguchi³

et al. 2022

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The thermally and optically stimulated luminescence (TSL and OSL) properties of Cu-doped CaF 2 ceramics synthesized by spark plasma sintering (SPS), as well as their scintillation and photoluminescence (PL) properties, were investigated. The PL and scintillation spectra showed emission peaks at 390 and 490 nm, which were ascribed to Cu + ions and Cu clusters, respectively, judging from the PL decay time constants. After X-ray irradiation, TSL and OSL were observed upon heating at 182 °C and irradiating light of 620 nm, respectively. The dominant luminescence centers in the TSL and OSL processes were considered to be Cu clusters. The 0.1% Cu-doped CaF 2 sample had a linear TSL response in the dose range from 0.01 to 1000 mGy.

“…In this study, we focused on a translucent ceramic, (22)(23)(24) a new material form of scintillators that can be used to enhance lattice-defect luminescence. Translucent ceramics have more lattice defects than other material forms such as single crystals, (25,26) which are generally used as scintillators; thus, ZnO translucent ceramics may have enhanced LY.…”

Section: Introductionmentioning

confidence: 99%

Scintillation Properties of Li-doped ZnO Translucent Ceramic

Kunikata¹,

Kato²,

Shiratori³

et al. 2022

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We synthesized a 0.1% Li-doped ZnO translucent ceramic using spark plasma sintering (SPS) and annealed it at 700 or 800 °C in air. The photoluminescence (PL) and scintillation properties of all samples were evaluated. The PL quantum yield (QY) and scintillation light yield (LY) were improved by annealing owing to the reduction in the number of oxygen defects in comparison with the as-prepared sample. Among the translucent ceramic samples, the sample annealed at 700 °C showed the highest LY (5800 ph/5.5 MeV-α); the scintillation LY was lower in the sample annealed at 800 °C because of the increase in the number of trap sites.