Optical and radiation response characteristics of Eu2O3-doped K2O–Bi2O3–Ga2O3 glasses

Kawano, Naoki; Shinozaki, Kenji; Akatsuka, Masaki; Kimura, Hiromi; Nakauchi, Daisuke; Yanagida, Takayuki

doi:10.1016/j.ceramint.2020.12.292

Cited by 19 publications

(5 citation statements)

References 39 publications

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“…The averaged intensity at 20 ms after X-ray was stopped was used for estimation of an afterglow level (I AG ) based on our previous works. 30,31) The I AG values were 661 ppm (0%Er 2 O 3 ), 551 ppm (0.1%Er 2 O 3 ), 663 ppm (0.5%Er 2 O 3 ), and 531 ppm (1.0%Er 2 O 3 ) that were almost the same level among the fabricated BaO-Nb 2 O 5 -TeO 2 glasses. Afterglow phenomenon demonstrates complex trapping and detrapping processes of electron traps (~25 meV) at RT from the bottom of the conduction band.…”

Section: Resultsmentioning

confidence: 79%

Scintillation properties of Er³⁺-activated BaO–Nb₂O₅–TeO₂ glasses

Kawano

Okazaki

Takebuchi

et al. 2023

Jpn. J. Appl. Phys.

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Recently, glasses have gained great interest for use as scintillators owing to lots of industrial benefits such as ease of producing customizable shapes and low production cost. Herein, the Er3+-activated BaO–Nb2O5–TeO2 glasses were fabricated for the development of near-infrared (NIR) glass scintillators. The Er3+-activated BaO–Nb2O5–TeO2 glasses exhibited efficient photoluminescence and scintillation that originated from the 4f→4f transition of Er3+. Their quantum yields in photoluminescence were 80% (0.1%Er2O3), 81% (0.5% Er2O3), and 61% (1.0%Er2O3). Further, an almost linear correlation between an X-ray dose rate and NIR scintillation intensity was observed in the 0.5–5000 mGy/h dose rate range. Interestingly, the lowest detectable dose rate limit (0.5 mGy/h) was lower than that of Er-doped Bi4Ge3O12 and Nd-doped GdVO4 single crystals. Further, afterglow levels of the non-doped and Er3+-activated BaO–Nb2O5–TeO2 glasses were about 600 ppm. The observed NIR scintillation properties indicated that the Er3+-activated tellurite glasses should be promising compounds for NIR-emitting scintillators.

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Section: Resultsmentioning

confidence: 79%

Scintillation properties of Er³⁺-activated BaO–Nb₂O₅–TeO₂ glasses

Kawano

Okazaki

Takebuchi

et al. 2023

Jpn. J. Appl. Phys.

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“…All the PSAT glasses showed a halo peak, and no sharp peaks derived from a crystalline phase were observed; therefore, all the PSAT glasses were found to be amorphous. (4,18)…”

Section: Samplesmentioning

confidence: 99%

“…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%

“…(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. Tellurite glasses can exhibit high detection efficiency under X-and γ-ray exposure because of their high effective atomic number.…”

Section: Introductionmentioning

confidence: 99%

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

Nakamori¹,

Kawano²,

Takaku³

et al. 2022

Sensors and Materials

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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.

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“…To date, the scintillation properties of oxide glasses have been studied by many researchers, (25)(26)(27)(28)(29)(30)(31) whereas those of non-oxide glasses have not been studied extensively. Recently, there have been a few reports on the scintillation properties of non-oxide glasses such as AEF 2 -Al 2 O 3 -B 2 O 3 (AE = Ca, Sr, Ba), (32)(33)(34) (35) CeCl 3 -CsCl-CsPO 3 -Al(PO 3 ) 3 , (36) and CsCl-BaCl 2 -ZnCl 2 .…”

Section: Introductionmentioning

confidence: 99%

Optical and Scintillation Properties of Eu-doped CsBr–BaBr2–ZnBr2 Glasses

Kimura¹,

Kato²,

Nakauchi³

et al. 2022

Sensors and Materials

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20CsBr-20BaBr 2 -60ZnBr 2 glasses doped with various concentrations of Eu (0.01, 0.05, 0.1, and 0.5%) were synthesized by the melt-quenching method, and their optical and scintillation properties were investigated. In the photoluminescence (PL) and X-ray-induced scintillation spectra of all the prepared glasses, the emission band around 415 nm due to the 5d-4f transitions of Eu 2+ was observed. In the scintillation spectrum, the 0.5% Eu-doped glass showed sharp emission peaks at 590 and 610 nm, which have a typical spectral shape for the 4f-4f transitions of Eu 3+ . Under 241 Am α-ray irradiation, the light yields of 0.01 and 0.05% Eu-doped glasses were 75 and 100 ph/5.5 MeV-α, respectively.

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Optical and radiation response characteristics of Eu2O3-doped K2O–Bi2O3–Ga2O3 glasses

Cited by 19 publications

References 39 publications

Scintillation properties of Er³⁺-activated BaO–Nb₂O₅–TeO₂ glasses

Scintillation properties of Er³⁺-activated BaO–Nb₂O₅–TeO₂ glasses

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

Optical and Scintillation Properties of Eu-doped CsBr–BaBr2–ZnBr2 Glasses

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Optical and radiation response characteristics of Eu2O3-doped K2O–Bi2O3–Ga2O3 glasses

Cited by 19 publications

References 39 publications

Scintillation properties of Er3+-activated BaO–Nb2O5–TeO2 glasses

Scintillation properties of Er3+-activated BaO–Nb2O5–TeO2 glasses

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

Optical and Scintillation Properties of Eu-doped CsBr–BaBr2–ZnBr2 Glasses

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Scintillation properties of Er³⁺-activated BaO–Nb₂O₅–TeO₂ glasses

Scintillation properties of Er³⁺-activated BaO–Nb₂O₅–TeO₂ glasses