Temperature dependence of photo- and radio-luminescence and scintillation properties of Lu.sub.2./sub.YAl.sub.2.5./sub.Ga.sub.2.5./sub.O.sub.12./sub.:Ce,Mg multicomponent garnet crystals

0585119 - FZÚ 2025 RIV NL eng J - Journal Article
Chewpraditkul, Wa. - Horiai, T. - Beitlerová, Alena - Kučerková, Romana - Babin, Vladimir - Yoshikawa, A. - Chewpraditkul, W. - Nikl, Martin
Temperature dependence of photo- and radio-luminescence and scintillation properties of Lu₂YAl_2.5Ga_2.5O₁₂:Ce,Mg multicomponent garnet crystals.
Optical Materials. Roč. 147, Jan (2024), č. článku 114738. ISSN 0925-3467. E-ISSN 1873-1252
R&D Projects: GA ČR(CZ) GA21-17731S; GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : codoping * garnet crystal * light yield * luminescence * scintillation * thermoluminescence
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.9, year: 2022

Luminescence and scintillation properties of Lu2YAl2.5Ga2.5O12:Ce,Mg (0.02, 0.05 %) garnet crystals grown by the micro-pulling down method were investigated. The onset temperature for luminescence quenching at ~365 K is determined from the temperature dependence of photoluminescence decay time. At room temperature, the Mg (0.05 %) sample exhibits high integral scintillation efficiency of ~445 % of BGO crystal, light yield value of 23,500 photons/MeV, and fast scintillation decay times of 20 ns (15 %) + 54 ns (85 %). The higher radioluminescence intensity of the Mg (0.05 %) sample correlates with an appearance of its lower themally-stimulated luminescence intensity in 77–500 K range.
Permanent Link: https://hdl.handle.net/11104/0352852