Effects of Sc.sup.3+./sup. admixture on luminescence and scintillation properties of Ce.sup.3+./sup.-doped Lu.sub.2./sub.Y(Al.sub.5-x./sub.Sc.sub.x./sub.)O.sub.12./sub. (x = 1, 1.5, 2) garnet single-crystalline films

0576151 - FZÚ 2024 RIV NL eng J - Článek v odborném periodiku
Chewpraditkul, Wa. - Wantong, K. - Chewpraditkul, W. - Pattanaboonmee, N. - Kučerková, Romana - Beitlerová, Alena - Nikl, Martin - Strachotová, D. - Kučera, M.
Effects of Sc³⁺ admixture on luminescence and scintillation properties of Ce³⁺-doped Lu₂Y(Al_5-xSc_x)O₁₂ (x = 1, 1.5, 2) garnet single-crystalline films.
Optical Materials. Roč. 145, Nov (2023), č. článku 114417. ISSN 0925-3467. E-ISSN 1873-1252
Grant CEP: GA ČR(CZ) GA21-17731S; GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: Lu₂Y(Al,Sc)₅O₁₂:Ce * liquid phase epitaxy * luminescence * scintillation * single-crystalline films
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 3.9, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.optmat.2023.114417

Effects of Sc3+ admixture on luminescence and scintillation properties were studied in Ce3+ - doped Lu2Y(Al5-xScx)O12 (x = 1, 1.5, 2) garnet single-crystalline films grown by the isothermal liquid phase epitaxy technique. The Ce3+ photoluminescence (PL) was slightly blue shifted with increasing Sc content due to a decrease in crystal field splitting of the Ce3+ 5d levels. In addition, the thermal activation energy of PL quenching, estimated from the temperature dependence of PL decay times, decreased with increasing Sc content. Lu2YAl4ScO12:Ce exhibited the highest light yield (LY) value of 420 photons/MeV at 5.5 MeV α particles along with a fast scintillation decay time constant (τe) of 17.4 ns. At room temperature, the decrease of LY value with increasing Sc content could be attributed to the thermal ionization process.
Trvalý link: https://hdl.handle.net/11104/0345739