TY - JOUR
T1 - Scintillation characteristics and temperature quenching of radio- and photoluminescence of Mg2+-codoped (Lu,Gd)3Al2.4Ga2.6O12:Ce garnet crystals
AU - Chewpraditkul, Warut
AU - Pattanaboonmee, Nakarin
AU - Sakthong, Ongsa
AU - Chewpraditkul, Weerapong
AU - Yamaji, Akihiro
AU - Kurosawa, Shunsuke
AU - Kamada, Kei
AU - Yoshikawa, Akira
AU - Makowski, Michał
AU - Witkowski, Marcin E.
AU - Drozdowski, Winicjusz
AU - Beitlerova, Alena
AU - Kucerkova, Romana
AU - Babin, Vladimir
AU - Nikl, Martin
N1 - Funding Information:
This research was performed under the GIMRT Program of the Institute for Materials Research, Tohoku University (Proposal No. 19K0521). Partial support by the basic research fund of the Thailand Science Research and Innovation (TSRI) under project no. 64A306000048 of the King Mongkut's University of Technology Thonburi and by the Czech Ministry of Education, Youth and Sports SOLID21 CZ.02.1. 01/0.0/0.0/16_019/0000760 and GACR 21-17731S projects are gratefully acknowledged.
Funding Information:
This research was performed under the GIMRT Program of the Institute for Materials Research , Tohoku University (Proposal No. 19K0521 ). Partial support by the basic research fund of the Thailand Science Research and Innovation ( TSRI ) under project no. 64A306000048 of the King Mongkut's University of Technology Thonburi and by the Czech Ministry of Education, Youth and Sports SOLID21 CZ.02.1. 01/0.0/0.0/16_019/0000760 and GACR 21-17731S projects are gratefully acknowledged.
Publisher Copyright:
© 2021
PY - 2021/11
Y1 - 2021/11
N2 - Luminescence and scintillation characteristics of Mg2+-codoped (LuxGd3-x)Al2.4Ga2.6O12:Ce (x = 0.2–0.8) garnet crystals grown by the micro-pulling down method are investigated. The Ce3+ 5d1 → 4f luminescence is blue-shifted with increasing Lu content due to the decrease in crystal field splitting of the 5 d levels. With increasing Lu content, the shortening of scintillation decay time accompanied with a decrease of LY value as measured at room temperature can be explained by thermal ionization of the Ce3+ 5d1 excited state. Co-doping with Mg2+ results in the shortening of scintillation decay time, the reduction of LY value and afterglow intensity. At low temperature the radioluminescence quenching is observed in correlation with large thermoluminescence peaks, which can be attributed to the localization of electrons at intrinsic shallow traps.
AB - Luminescence and scintillation characteristics of Mg2+-codoped (LuxGd3-x)Al2.4Ga2.6O12:Ce (x = 0.2–0.8) garnet crystals grown by the micro-pulling down method are investigated. The Ce3+ 5d1 → 4f luminescence is blue-shifted with increasing Lu content due to the decrease in crystal field splitting of the 5 d levels. With increasing Lu content, the shortening of scintillation decay time accompanied with a decrease of LY value as measured at room temperature can be explained by thermal ionization of the Ce3+ 5d1 excited state. Co-doping with Mg2+ results in the shortening of scintillation decay time, the reduction of LY value and afterglow intensity. At low temperature the radioluminescence quenching is observed in correlation with large thermoluminescence peaks, which can be attributed to the localization of electrons at intrinsic shallow traps.
KW - Afterglow
KW - Ce
KW - Light yield
KW - Luminescence
KW - Scintillation
KW - Thermoluminescence
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U2 - 10.1016/j.optmat.2021.111595
DO - 10.1016/j.optmat.2021.111595
M3 - Article
AN - SCOPUS:85115188882
VL - 121
JO - Optical Materials
JF - Optical Materials
SN - 0925-3467
M1 - 111595
ER -