Investigation of Optical Properties of Ceramic Ce:GAGG by High Temperature Annealing

Chansun Park; Muhammad Nasir Ullah; Chanho Kim; Shinhaeng Cho; Jung Yeol Yeom

doi:10.3938/jkps.75.962

Investigation of Optical Properties of Ceramic Ce:GAGG by High Temperature Annealing

Chansun Park, Muhammad Nasir Ullah, Chanho Kim, Shinhaeng Cho, Jung Yeol Yeom

Research output: Contribution to journal › Article

1 Citation (Scopus)

Abstract

An as-fabricated cerium-doped ceramic scintillator Gd₃Al₂Ga₃O₁₂ (Ce:GAGG) was thermally annealed at different temperatures. The light output and energy resolution of the scintillators were measured before and after thermal treatment. The effect of thermal annealing in the air at high temperature (at 1000 °C for 5 hours) deforms the microstructure by mitigating oxygen vacancies of the ceramic scintillator. This has been proven by XPS study that showed the existence of oxygen vacancies and subsequent decrease of oxygen deficiency amid annealing treatment that led to an output signal increase. The diffusion ability of oxygen atoms by annealing played a key role in compensating for defect sites. In this study, by controlling thermodynamic conditions, the light output was enhanced by ∼30.4% and the energy resolution improved by ∼2.4% after annealing at 1000 °C in the air.

Original language	English
Pages (from-to)	962-967
Number of pages	6
Journal	Journal of the Korean Physical Society
Volume	75
Issue number	12
DOIs	https://doi.org/10.3938/jkps.75.962
Publication status	Published - 2019 Dec 1

Keywords

Energy resolution
Gamma-rays
Light output
Scintillator
X-ray Photoelectron Spectroscopy

ASJC Scopus subject areas

Physics and Astronomy(all)

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Park, C., Ullah, M. N., Kim, C., Cho, S., & Yeom, J. Y. (2019). Investigation of Optical Properties of Ceramic Ce:GAGG by High Temperature Annealing. Journal of the Korean Physical Society, 75(12), 962-967. https://doi.org/10.3938/jkps.75.962

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title = "Investigation of Optical Properties of Ceramic Ce:GAGG by High Temperature Annealing",

abstract = "An as-fabricated cerium-doped ceramic scintillator Gd3Al2Ga3O12 (Ce:GAGG) was thermally annealed at different temperatures. The light output and energy resolution of the scintillators were measured before and after thermal treatment. The effect of thermal annealing in the air at high temperature (at 1000 °C for 5 hours) deforms the microstructure by mitigating oxygen vacancies of the ceramic scintillator. This has been proven by XPS study that showed the existence of oxygen vacancies and subsequent decrease of oxygen deficiency amid annealing treatment that led to an output signal increase. The diffusion ability of oxygen atoms by annealing played a key role in compensating for defect sites. In this study, by controlling thermodynamic conditions, the light output was enhanced by ∼30.4% and the energy resolution improved by ∼2.4% after annealing at 1000 °C in the air.",

keywords = "Energy resolution, Gamma-rays, Light output, Scintillator, X-ray Photoelectron Spectroscopy",

author = "Chansun Park and Ullah, {Muhammad Nasir} and Chanho Kim and Shinhaeng Cho and Yeom, {Jung Yeol}",

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AU - Park, Chansun

AU - Ullah, Muhammad Nasir

AU - Kim, Chanho

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AU - Yeom, Jung Yeol

PY - 2019/12/1

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N2 - An as-fabricated cerium-doped ceramic scintillator Gd3Al2Ga3O12 (Ce:GAGG) was thermally annealed at different temperatures. The light output and energy resolution of the scintillators were measured before and after thermal treatment. The effect of thermal annealing in the air at high temperature (at 1000 °C for 5 hours) deforms the microstructure by mitigating oxygen vacancies of the ceramic scintillator. This has been proven by XPS study that showed the existence of oxygen vacancies and subsequent decrease of oxygen deficiency amid annealing treatment that led to an output signal increase. The diffusion ability of oxygen atoms by annealing played a key role in compensating for defect sites. In this study, by controlling thermodynamic conditions, the light output was enhanced by ∼30.4% and the energy resolution improved by ∼2.4% after annealing at 1000 °C in the air.

AB - An as-fabricated cerium-doped ceramic scintillator Gd3Al2Ga3O12 (Ce:GAGG) was thermally annealed at different temperatures. The light output and energy resolution of the scintillators were measured before and after thermal treatment. The effect of thermal annealing in the air at high temperature (at 1000 °C for 5 hours) deforms the microstructure by mitigating oxygen vacancies of the ceramic scintillator. This has been proven by XPS study that showed the existence of oxygen vacancies and subsequent decrease of oxygen deficiency amid annealing treatment that led to an output signal increase. The diffusion ability of oxygen atoms by annealing played a key role in compensating for defect sites. In this study, by controlling thermodynamic conditions, the light output was enhanced by ∼30.4% and the energy resolution improved by ∼2.4% after annealing at 1000 °C in the air.

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