Gd-admixed (Lu,Gd)AlO.sub.3./sub. single crystals: breakthrough in heavy perovskite scintillators

0547628 - FZÚ 2022 RIV JP eng J - Journal Article
Pokorný, Martin - Babin, Vladimir - Beitlerová, Alena - Jurek, Karel - Polák, J. - Houžvička, J. - Pánek, D. - Parkman, T. - Vaněček, Vojtěch - Nikl, Martin
Gd-admixed (Lu,Gd)AlO₃ single crystals: breakthrough in heavy perovskite scintillators.
NPG Asia Materials. Roč. 13, č. 1 (2021), č. článku 66. ISSN 1884-4049. E-ISSN 1884-4057
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA TA ČR(CZ) FW01010218
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : heavy scintillator * perovskite * bandgap engineering * single crystal
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 10.761, year: 2021
Method of publishing: Open access

Bandgap engineering in aluminum perovskites by a balanced Gd admixture in a Lu cation sublattice results in a dramatic increase of scintillation performance. In an optimized composition of (Lu, Gd)AlO3:Ce (LuGdAP:Ce), the light yield approaches 21,000 phot/MeV, which is close to that of classical but much less dense YAP:Ce and 50% higher than the best LuYAP:Ce reported in the literature. Moreover, contrary to LuYAP:Ce, the LuGdAP host maintains a high effective atomic number close to that of LuAP:Ce (Zeff = 64.9), which is comparable to commercial LSO:Ce. An enormous decrease in afterglow on the millisecond time scale and acceleration in the rise time of the scintillation response further increase the application potential of the LuGdAP host. Such an innovative (Lu, Gd)AP:Ce scintillator will become competitive for use in applications that require heavy, fast, and high light yield bulk scintillators.
Permanent Link: http://hdl.handle.net/11104/0323919