Evaluation of properties of YAG (Ce) ceramic scintillators

Yanagida, Takayuki; Takahashi, H.; Ito, Takashi; Kasama, Daisuke; Enoto, T.; Sato, Munehiko; Hirakuri, S.; Kokubun, M.; Makishima, Kazuo; Yanagitani, Takahiko; Yagi, Hideki; Shigeta, Takeshi

doi:10.1109/tns.2005.856757

Cited by 205 publications

(115 citation statements)

References 13 publications

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“…In our attempts to retain the high light yield of GYAG, but attain phase purity, we subsequently worked on small additions of scandium to GYAG, as Gd 1.5 Y 1.5 Sc x Al 5-x O 12 (in all cases Ce = 0.03 atomic fraction substituting equally for Gd and Y) and found that acceptable transparency can be achieved with as little as Sc = 0.12 ( Figure 7). In summary, we find that energy resolution for garnet ceramics matches performance of single crystals of the same materials, as reported for YAG by Yanagida, et al [19] though the green-red luminescence of Ce 3+ in the garnet host is a poor match to bi-alkali PMTs. Gd-based garnets have a faster primary decay (<200 ns) than Tb-based garnets.…”

Section: B Gadolinium Garnetssupporting

confidence: 86%

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Scintillators With Potential to Supersede Lanthanum Bromide

Cherepy

Payne

Asztalos

et al. 2009

IEEE Trans. Nucl. Sci.

240

118

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is the most promising. SrI 2 (Eu) emits into the Eu 2+ band, centered at 435 nm, with a decay time of 1.2 µs and a light yield of up to 115,000 photons/MeV. It offers energy resolution better than 3% FWHM at 662 keV, and exhibits excellent light yield proportionality. Transparent ceramics fabrication allows production of Gadolinium-and Terbium-based garnets which are not growable by melt techniques due to phase instabilities. While scintillation light yields of Cerium-doped ceramic garnets are high, light yield non-proportionality and slow decay components appear to limit their prospects for high energy resolution.We are developing an understanding of the mechanisms underlying energy dependent scintillation light yield non-proportionality and how it affects energy resolution. We have also identified aspects of optical design that can be optimized to enhance energy resolution.

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Section: B Gadolinium Garnetssupporting

confidence: 86%

“…YAG:Ce ceramics have been demonstrated to offer energy resolution in of ~7% [19], but its Z eff is too low for efficient photoelectric interaction.…”

Section: Introductionmentioning

confidence: 99%

Scintillators With Potential to Supersede Lanthanum Bromide

Cherepy

Payne

Asztalos

et al. 2009

IEEE Trans. Nucl. Sci.

240

118

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“…In this spectrum, -ray peak was clearly detected. If we used the quantum efficiency of the PMT at 520 nm (stronger emission peak) of 17%, the scintillation light yield was determined as 500 photons/5.5 MeV- based on the pulse height of the light yield calibrated Ce:YAG which had a similar emission peak around 520 nm [18]. Compared with Ag:ZnS, the observed light yield was not so high.…”

Section: Resultsmentioning

confidence: 99%

Optical and Scintillation Properties of Pure ZnS Crystal

Yanagida

Fujimoto²,

Yanagida

2014

Proceedings of the 12th Asia Pacific Physics Conference (APPC12)

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Optical and scintillation properties of pure ZnS single crystal were examined. ZnS showed ~80% optical transmittance in wavelength longer than 350 nm. In X-and -ray induced radioluminescence spectra, intense emission peaks at 430 and 520 nm were observed. The origin of the former and the latter emission peaks were ascribed to zinc vacancy and sulfur vacancy, respectively. The temperature dependence of X-ray radioluminescence was investigated and intensities of both emission peaks monotonically decreased in higher temperatures. Finally, the absolute scintillation light yield of pure ZnS turned out to be 500 photons/5.5 MeV-.

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“…(4)(5)(6)(7)(8)(9)(10)(11) Rare-earth-doped garnet materials are of considerable interest as scintillator materials. There are a number of rare-earth-doped garnet scintillators commercially available, (12)(13)(14)(15)(16)(17) and they are characterized as having a considerably high scintillation intensity among oxide scintillators. However, the emission range of conventional scintillators is in the UV and visible range under the assumption that they will be used together with a photomultiplier tube (PMT) in the counting mode.…”

Section: Introductionmentioning

confidence: 99%

Development of NIR-Emitting Scintillators Based on Rare-Earth-Doped Garnet Crystals – Part 1

2017

Sensors and Materials

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In this paper, we report on experimental results towards the development of near-infrared (NIR)-emitting scintillators based on rare-earth-doped garnet crystals, which were obtained as a part of collaborative research with the Nuclear Power Safety Technology Research Center, Chubu Electric Power Co., Inc. A series of garnet scintillators, Y 3 Al 5 O 12 (YAG) and Y 3 Al 2 Ga 3 O 12 (YAGG) doped with rare-earth elements (Nd, Sm, Ho, Er, Tm, and Yb) at varying concentrations (0.5, 1.0, 2.0, 5.0, and 10.0 mol%), were synthesized by the floating zone method and systematically characterized for NIR-emitting scintillator applications. Among all the samples, 5% Nd-doped YAG showed the highest scintillation intensity (integration mode). By taking the spectral responsivity of the photodetector and the attenuation of optical light guide into consideration, a combination of 5% Yb-doped YAG and an InGaAs detector is expected to give the highest detectable signal. The scintillation intensity effectively depends on the photoluminescence quantum yield and energy transfer efficiency, which is effectively correlated with not the quality of the crystal but the type of rare-earth ion doped.

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Evaluation of properties of YAG (Ce) ceramic scintillators

Cited by 205 publications

References 13 publications

Scintillators With Potential to Supersede Lanthanum Bromide

Scintillators With Potential to Supersede Lanthanum Bromide

Optical and Scintillation Properties of Pure ZnS Crystal

Development of NIR-Emitting Scintillators Based on Rare-Earth-Doped Garnet Crystals – Part 1

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