Fabrication and optical properties of cerium doped Lu.sub.3./sub.Ga.sub.3./sub.Al.sub.2./sub.O.sub.12./sub. scintillation ceramics

0499411 - FZÚ 2019 RIV NL eng J - Článek v odborném periodiku
Chen, X. - Hu, Z. - Dai, J. - Chen, H. - Shi, Y. - Kou, H. - Kučerková, Romana - Beitlerová, Alena - Nikl, Martin - Li, J.
Fabrication and optical properties of cerium doped Lu₃Ga₃Al₂O₁₂ scintillation ceramics.
Optical Materials. Roč. 85, Nov (2018), s. 121-126. ISSN 0925-3467. E-ISSN 1873-1252
Grant CEP: GA ČR GA16-15569S
Grant ostatní: AV ČR(CZ) CAS-17-02
Program: Bilaterální spolupráce
Institucionální podpora: RVO:68378271
Klíčová slova: Ce:LuGAG ceramics * photoluminescence * decay kinetics * scintillation response
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.687, rok: 2018

Cerium doped lutetium aluminum garnet single crystal has been drawing great research interest of scientists due to its superior performance in scintillation material for high energy particle detection. Here, we utilize the “bandgapengineering” strategy that the admixture of Ga3+inLu3Al5O12 can lower the conduction band edge and bury shallow traps, and get the Ce3+ doped Lu3Ga3Al2O12 scintillation ceramics sintered in the oxygen atmosphere and hot isostatic pressing post-treated. The luminescence and scintillation properties are investigated. A shortened dominant decay time and the presence of some second slower components in the photoluminescence decays prove that the admixture of Ga3+ in Lu3Al5O12 can lower the conduction band edge and consequently also the ionization barrier for Ce3+ emission from 5d1 level. The Ce:Lu3Ga3Al2O12 ceramic sample shows good steady-state scintillation efficiency under the X-ray excitation.
Trvalý link: http://hdl.handle.net/11104/0291830