Development of composite scintillators based on the LuAG:Pr single crystalline films and LuAG:Sc single crystals

0545125 - FZÚ 2022 RIV CH eng J - Journal Article
Gorbenko, V. - Witkiewicz-Łukaszek, S. - Zorenko, T. - Syrotych, Y. - Mareš, Jiří A. - Kučerková, Romana - Nikl, Martin - Sidletskiy, O. - Fedorov, A. - Zorenko, Yu.
Development of composite scintillators based on the LuAG:Pr single crystalline films and LuAG:Sc single crystals.
Crystals. Roč. 11, č. 8 (2021), č. článku 846. ISSN 2073-4352. E-ISSN 2073-4352
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA21-17731S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : composite scintillators * liquid-phase epitaxy * single crystalline films * single crystals * Pr³⁺ and Sc³⁺ dopants
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.670, year: 2021
Method of publishing: Open access

The scintillation properties of novel type of composite scintillator based on Lu3Al5O12:Pr(LuAG:Pr) single crystalline film (SCF) and LuAG:Sc substrate grown by the liquid-phase epitaxy method are considered in this work. The registration of α-particles and γ-quanta in such types of composites occurs by means of separation of the scintillation decay kinetics of SCF and crystal parts, respectively. Namely, under excitation by α-particles of 241Am (5.5 MeV) source and γ-quanta of 137Cs (662 keV) source, the large differences in the respective scintillation decay kinetics and decay time values tα and tγ are observed for the LuAG:Pr SCF/LuAG:Sc SC composite scintillator with various film thicknesses. Furthermore, the best tγ/tα ratio above 4.5 is achieved for such types of epitaxial structure with SCF and substrate thicknesses of 17 µm and about 0.5 mm, respectively.
Permanent Link: http://hdl.handle.net/11104/0321879