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Garnet Scintillators of Superior Timing Characteristics: Material, Engineering by Liquid Phase Epitaxy
Author(s) -
Průša Petr,
Kučera Miroslav,
Babin Vladimir,
Brůža Petr,
Pánek Dalibor,
Beitlerová Alena,
Mareš Jiri A.,
Hanuš Martin,
Lučeničová Zuzana,
Nikl Martin
Publication year - 2017
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201600875
Subject(s) - radioluminescence , scintillator , scintillation , photoluminescence , afterglow , materials science , yield (engineering) , luminescence , epitaxy , analytical chemistry (journal) , phase (matter) , optics , optoelectronics , physics , nanotechnology , detector , chemistry , composite material , layer (electronics) , gamma ray burst , chromatography , astronomy , quantum mechanics
Using liquid phase epitaxy, the Mg co‐doped multicomponent garnet film scintillators of composition (Ce 0.01 Lu 0.27 Gd 0.74 ) 3– x Mg x (Ga 2.48 Al 2.46 )O 12 , x = 0–0.002 (0–700 at. ppm) are prepared. Following luminescence and scintillation characteristics and their dependence on Mg concentration are studied: photoluminescence emission and excitation spectra, radioluminescence spectra, photoluminescence and scintillation decay curves, light yield, energy resolution, and afterglow. At lower Mg concentration, the timing characteristics are slightly improved, while light yield and energy resolution are not negatively influenced. At higher Mg concentration, scintillation decay is significantly accelerated, although light yield is somewhat reduced. Afterglow values become extraordinarily low for a garnet scintillator, at least two times better than the best values published so far, which paves the way for their application in fast frame imaging applications. A mechanism of the improvement is shortly discussed.