Composition tailoring in the Ce-doped multicomponent garnet epitaxial film scintillators

0456457 - FZÚ 2016 RIV US eng J - Článek v odborném periodiku
Průša, Petr - Kučera, M. - Mareš, Jiří A. - Onderišinová, Z. - Hanuš, M. - Babin, Vladimir - Beitlerová, Alena - Nikl, Martin
Composition tailoring in the Ce-doped multicomponent garnet epitaxial film scintillators.
Crystal Growth & Design. Roč. 15, č. 8 (2015), s. 3715-3723. ISSN 1528-7483. E-ISSN 1528-7505
Grant CEP: GA ČR GAP204/12/0805
Institucionální podpora: RVO:68378271
Klíčová slova: scintillation * liquid phase epitaxy * photoelectron yield * Ce³⁺ * multicomponent garnet
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 4.425, rok: 2015

Bulk single crystals of multicomponent garnet scintillators Lu3-xGdxGayAl5-yO12:Ce exhibit much improved scintillation properties in optimized composition (x = 2-3, y = 2-3) compared to the simple Lu3Al5O12:Ce one. Namely, much higher light yield, less intense slow components and better energy resolution have been achieved. This work shows that comparable enhancement of scintillation performance can be reached in case of epitaxial garnet films of similar composition through the nature of trapping states acting in transfer stage of scintillation mechanism may be different. This is the first time, excellent scintillation properties were reproduced in epitaxial films. Lu3-xGdxGayAl5-yO12:Ce samples were grown by liquid phase epitaxy from BaO-B2O3-BaF2 flux and quantitatively compared with top performance bulk crystals as concerns light yield, energy resolution, scintillation decay and afterglow.
Trvalý link: http://hdl.handle.net/11104/0256987