New types of composite scintillators based on the single crystalline films and crystals of Gd.sub.3./sub.(Al,Ga).sub.5./sub.O.sub.12./sub.:Ce mixed garnets

0541718 - FZÚ 2022 RIV CH eng J - Journal Article
Witkiewicz-Lukaszek, S. - Gorbenko, V. - Zorenko, T. - Syrotych, Y. - Kučerková, Romana - Mareš, Jiří A. - Nikl, Martin - Sidletskiy, O. - Fedorov, A. - Kurosawa, S. - Kamada, K. - Yoshikawa, A. - Zorenko, Yu.
New types of composite scintillators based on the single crystalline films and crystals of Gd₃(Al,Ga)₅O₁₂:Ce mixed garnets.
Materials Science and Engineering B-Advanced Functional Solid-State Materials. Roč. 264, Feb (2021), č. článku 114909. ISSN 0921-5107. E-ISSN 1873-4944
R&D Projects: GA ČR GA16-15569S
Institutional support: RVO:68378271
Keywords : crystals * single crystalline films * liquid phase epitaxy * scintillators * garnets * Ce dopant
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 3.407, year: 2021
Method of publishing: Limited access
https://doi.org/10.1016/j.mseb.2020.114909

This work presents the results of creation of novel composite scintillators based on the Gd3Al5-x GaxO12:Ce (x = 1.16–2.67) single crystalline films (SCF), grown by the LPE method onto Gd3Al2.5 Ga2.5O12:Ce single crystal (SC) substrates. The scintillation properties of film/crystal epitaxial structures were investigated under α–particle and γ–quantum excitations. Under α–particle excitation, the light yield of mentioned SCF scintillators is significantly less than that in their substrates due to the influence of Pb2+ flux contamination and formation of Pb2+-Ce4+ centers. Meanwhile, these SCF scintillators under α–excitation possess significantly faster decay kinetics than that of their substrates under γ–excitation. Therefore, the Gd3Al5-xGaxO12:Ce SCFs (x = 1.16–2.67) /Gd3Al2.5Ga2.5O12:Ce SC epitaxial structures can be used as composite scintillators for simultaneous registration of the components of mixed ionizing fluxes.
Permanent Link: http://hdl.handle.net/11104/0319247