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

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Gd 2 Hf 2 O 7 and Lu 2 Hf 2 O 7 single crystals doped with various rare-earth ions (Ce 3+ , Pr 3+ , and Tb 3+ ) were prepared by the floating zone method to investigate their photoluminescence and scintillation properties. The Ce-doped samples show scintillation signals with a broad peak in the range of 400-600 nm, whereas the Tb-and Pr-doped samples show relatively strong emission characterized by a few sharp peaks in the range of 480-700 nm due to 4f-4f transitions of the dopant ions. The scintillation spectra of the Ce-doped Lu 2 Hf 2 O 7 after annealing at various temperatures show significant changes in their shapes, suggesting changes in the valence of the Ce ions.

Section: Introductionmentioning

confidence: 99%

Photoluminescence and Scintillation Properties of Ce-, Pr-, and Tb-doped (Gd,Lu)2Hf2O7 Crystals

Nakauchi¹,

Fukushima²,

Kato³

et al. 2022

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“…With this ability, the scintillation detector has been implemented for various professional purposes, including astrophysics, (1) medicine, (2) natural resource exploration, (3) homeland security, (4) and many more fields. For several decades until now, solid-state scintillators in various forms of materials, including plastics, (5) glasses, (6)(7)(8)(9)(10) single crystals, (11)(12)(13)(14)(15)(16) transparent ceramics, (17)(18)(19)(20) and composite materials, have been developed. (21,22) Among all the possible materials, single crystals are one of the promising choices because the single-crystal scintillator has many advantages, including high chemical stability, transparency, and high scintillation light yield.…”

Section: Introductionmentioning

confidence: 99%

Comparative Study of Optical and Scintillation Properties of Tm-doped La2Si2O7 and Lu2Si2O7 Single Crystals

Kantuptim¹,

Nakauchi²,

Kato³

et al. 2022

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Lanthanum and lutetium pyrosilicate (La 2 Si 2 O 7 and Lu 2 Si 2 O 7 , respectively) single crystals with a Tm doping concentration of 2.0% were successfully synthesized by the floating-zone method. X-ray diffraction patterns showed a single phase in each compound without the impurity phase. Both their photoluminescence (PL) and scintillation properties were systematically determined in this study, including PL emission, PL decay time, X-ray-induced scintillation spectra, X-ray-induced scintillation decay time, afterglow level, and pulse height spectra. The emission from Tm 3+ 4f-4f transition was observed on both samples as shown by PL emission as well as X-ray-induced scintillation spectra. Under 137 Cs 662 keV γ-ray irradiation, their scintillation light yields were 2340 ph/MeV for Tm-doped Lu 2 Si 2 O 7 and 1440 ph/MeV for Tm-doped La 2 Si 2 O 7 .

“…Glass scintillators have recently attracted research attention because of their industrial merits such as low cost, excellent moldability, flexible glass composition, and the possibility of large-volume production. (4)(5)(6)(7)(8)(9)(10) The scintillation properties of many glasses doped with a rare-earth (RE) ion, such as Dy 3+ -activated B 2 O 3 -Al 2 O 3 -SrO glasses and Eu 3+ -activated K 2 O-Bi 2 O 3 -Ga 2 O 3 glasses, have been evaluated. (11,12) Tellurite glasses are also potential glass scintillators.…”

Section: Introductionmentioning

confidence: 99%

Radiation Response Characteristics of Pr3+-activated SrO–Al2O3–TeO2 Glasses

Nakamori¹,

Kawano²,

Takaku³

et al. 2022

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We fabricated Pr 3+ -activated glasses having a composition of 10SrO-5Al 2 O 3 -85TeO 2 (PSAT) for potential use as radiation detectors, and their photoluminescence (PL) and X-ray-induced scintillation properties were then characterized. The PSAT glasses showed several emission peaks in their PL spectra owing to the 4f-4f transitions of Pr 3+ . Furthermore, they exhibited typical PL decay times (0.09-0.86 ms), where the decay originated from the 4f-4f transitions of Pr 3+ . In the scintillation spectra of the PSAT glasses, three peaks at approximately 480, 618, and 636 nm were observed. The scintillation decay times were 0.747-0.840 ms, corresponding to the 4f-4f transitions of Pr 3+ . Furthermore, the PSAT glasses showed afterglow levels of 352-521 ppm, and the lowest afterglow level (352 ppm) was comparable to that of Tl-activated CsI single crystal.