TY - JOUR
T1 - Luminescence and scintillation characteristics of (GdxY3-x)Al2Ga3O12:Ce (x = 1,2,3) single crystals
AU - Chewpraditkul, Warut
AU - Pattanaboonmee, Nakarin
AU - Sakthong, Ongsa
AU - Chewpraditkul, Weerapong
AU - Szczesniak, Tomasz
AU - Moszynski, Marek
AU - Kamada, Kei
AU - Yoshikawa, Akira
AU - Nikl, Martin
N1 - Funding Information:
Warut Chewpraditkul acknowledges the Petchra Pra Jom Klao Doctor's Degree Research Scholarship from King Mongkut's University of Technology Thonburi. This work is partially supported by the funding program for next generation world-leading researchers, Japan Society for the Promotion of Science (JSPS) and Development of Systems and Technology for Advanced Measurement and Analysis , Japan Science and Technology Agency (JST) . Financial support of EC H2020 project INTELUM , No. 644260 , joint Czech-Japan (ASCR-JSPS) collaboration project and Czech Science Foundation , No. 16-15569S project is also gratefully acknowledged.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2018/2
Y1 - 2018/2
N2 - The luminescence and scintillation characteristics of Czochralski-grown (GdxY3-x)Al2Ga3O12:Ce (x = 1,2,3) single crystals are presented. With increasing Gd content in this garnet host, the 5d2 absorption band was blue-shifted while the 5d1 absorption and 5d1 → 4f emission bands were red-shifted due to an increase in the crystal field splitting of the 5d levels. In addition, the luminescence quenching temperature of the Ce3+emission and activation energy for thermal quenching decreased with increasing Gd content. The Gd3+ → Ce3+ energy transfer was evidenced by photoluminescence excitation spectra of Ce3+ emission. At 662 keV γ - rays, the light yield (LY) of 48,600 ph/MeV and energy resolution of 6.5% was measured for a Gd3Al2Ga3O12:Ce crystal. Scintillation decay measurements were performed using the time-correlated single photon counting technique. Superior time resolution of Gd3Al2Ga3O12:Ce is due to its high LY and fast scintillation response. The total mass attenuation coefficients at 60 and 662 keV γ - rays were also determined.
AB - The luminescence and scintillation characteristics of Czochralski-grown (GdxY3-x)Al2Ga3O12:Ce (x = 1,2,3) single crystals are presented. With increasing Gd content in this garnet host, the 5d2 absorption band was blue-shifted while the 5d1 absorption and 5d1 → 4f emission bands were red-shifted due to an increase in the crystal field splitting of the 5d levels. In addition, the luminescence quenching temperature of the Ce3+emission and activation energy for thermal quenching decreased with increasing Gd content. The Gd3+ → Ce3+ energy transfer was evidenced by photoluminescence excitation spectra of Ce3+ emission. At 662 keV γ - rays, the light yield (LY) of 48,600 ph/MeV and energy resolution of 6.5% was measured for a Gd3Al2Ga3O12:Ce crystal. Scintillation decay measurements were performed using the time-correlated single photon counting technique. Superior time resolution of Gd3Al2Ga3O12:Ce is due to its high LY and fast scintillation response. The total mass attenuation coefficients at 60 and 662 keV γ - rays were also determined.
KW - (Gd,Y)AlGaO:Ce
KW - Energy resolution
KW - Luminescence
KW - Scintillation decay
KW - Time resolution
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U2 - 10.1016/j.optmat.2017.12.025
DO - 10.1016/j.optmat.2017.12.025
M3 - Article
AN - SCOPUS:85038836941
SN - 0925-3467
VL - 76
SP - 162
EP - 168
JO - Optical Materials
JF - Optical Materials
ER -