Scintillation characteristics and temperature quenching of radio- and photoluminescence of Mg2+-codoped (Lu,Gd)3Al2.4Ga2.6O12:Ce garnet crystals
| Autor: | Shunsuke Kurosawa, Romana Kucerkova, W. Chewpraditkul, Michał Makowski, Akihiro Yamaji, Vladimir Babin, Alena Beitlerova, Akira Yoshikawa, Ongsa Sakthong, Weerapong Chewpraditkul, Kei Kamada, Nakarin Pattanaboonmee, Marcin E. Witkowski, Winicjusz Drozdowski, Martin Nikl |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Quenching
Scintillation Photoluminescence Materials science Organic Chemistry Analytical chemistry Thermal ionization Radioluminescence Thermoluminescence Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Inorganic Chemistry Excited state Electrical and Electronic Engineering Physical and Theoretical Chemistry Luminescence Spectroscopy |
| Zdroj: | Optical Materials. 121:111595 |
| ISSN: | 0925-3467 |
| DOI: | 10.1016/j.optmat.2021.111595 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect