Scintillation properties of Gd3Al2Ga3O12:Ce, Li and Gd3Al2Ga3O12:Ce, Mg single crystal scintillators: A comparative study
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Author list: Chewpraditkul W., Pattanaboonmee N., Sakthong O., Wantong K., Chewpraditkul W., Yoshikawa A., Kamada K., Kurosawa S., Szczesniak T., Moszynski M., Babin V., Nikl M.
Publisher: Elsevier
Publication year: 2019
Journal: Optical Materials (0925-3467)
Volume number: 92
Start page: 181
End page: 186
Number of pages: 6
ISSN: 0925-3467
eISSN: 1873-1252
Languages: English-Great Britain (EN-GB)
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Abstract
The scintillation characteristics of Gd3Al2Ga3O12:Ce, Li (GAGG:Ce,Li) and Gd3Al2Ga3O12:Ce, Mg (GAGG:Ce,Mg) single crystals were compared. Radioluminescence spectra and photoluminescence decay curves were measured at various temperatures between 77 and 500 K to investigate the thermal luminescence quenching. At 662 keV γ rays, the LY value of 35,400 photons/MeV and energy resolution of 6.9% obtained for GAGG:Ce, Li are superior to those of 24,200 photons/MeV and 9.5% for GAGG:Ce,Mg. Scintillation decays are approximated by a double exponentials with a fast principal decay component of 47 ns (83%) for GAGG:Ce, Mg and 90 ns (86%) for GAGG:Ce,Li. Coincidence time resolution of 282 ps obtained for GAGG:Ce, Mg is better than that of 389 ps for GAGG:Ce,Li. GAGG:Ce, Mg shows a much lower afterglow and thermally stimulated luminescence intensity with respect to GAGG:Ce,Li. © 2019
Keywords
Multicomponent garnets
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