0435845 - FZÚ 2015 RIV US eng J - Článek v odborném periodiku
Nikl, Martin - Kamada, K. - Babin, Vladimir - Pejchal, Jan - Pilařová, K. - Mihóková, Eva - Beitlerová, Alena - Bartosiewicz, Karol - Kurosawa, S. - Yoshikawa, A.
Defect engineering in Ce-doped aluminum garnet single crystal scintillators.
Crystal Growth & Design. Roč. 14, č. 9 (2014), 4827-4833. ISSN 1528-7483. E-ISSN 1528-7505
Grant CEP: GA ČR GA13-09876S; GA MŠMT(CZ) LH14266
Institucionální podpora: RVO:68378271
Klíčová slova: scintillators * garnets * luminescence
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
Impakt faktor: 4.891, rok: 2014 ; AIS: 0.906, rok: 2014
DOI: https://doi.org/10.1021/cg501005s

Mg-codoped Lu3Al5O12:Ce single crystal scintillators were prepared by a micropulling down method in a wide concentration range from 0 to 3000 ppm of Mg codopant. Their structure and chemical composition were checked by X-ray diffraction and electron probe microanalysis techniques. Absorption and luminescence spectra, photoluminescence decays, and thermoluminescence glow curves were measured together with several other scintillation characteristics, namely, the scintillation decay, light yield, afterglow, and radiation damage to reveal the effect of Mg codoping. Several material characteristics manifest a beneficial effect of Mg codopant. We propose a model explaining the mechanism of material improvement which is based on the stabilization of a part of the cerium dopant in the tetravalent charge state. The stable Ce4+ center provides an additional fast radiative recombination pathway in the scintillation mechanism and efficiently competes with electron traps in garnet scintillators.
Trvalý link: http://hdl.handle.net/11104/0239697