We use various techniques to study optical and scintillation properties of Ce-doped yttrium aluminum garnet, Y3Al5O12 (YAG:Ce), in the form of a high-quality industrial single crystal. This was compared to optical ceramics prepared from YAG:Ce nanopowders. We present experimental data in the areas of optical absorption, radioluminescence, scintillation decay, photoelectron yield, thermally stimulated luminescence and radiation-induced absorption. The results point to an interesting feature-the absence of antisite (Y-A1, i.e. Y at the Al site) defects in optical ceramics. The scintillation decay of the ceramics is faster than that of the single crystal, but its photoelectron yield (measured with I lts integration time) is about 30-40% lower. Apart from the photoelectron yield value the YAG:Ce optical ceramic is fully comparable to a high quality industrial YAG:Ce single crystal and can become a competitive scintillator material. (C) 2006 Elsevier B.V. All rights reserved.
Mihokova, E., Nikl, M., Mares, J., Beitlerova, A., Vedda, A., Nejezchleb, K., et al. (2007). Luminescence and scintillation properties of YAG : Ce single crystal and optical ceramics. JOURNAL OF LUMINESCENCE, 126(1), 77-80 [10.1016/j.jlumin.2006.05.004].
Luminescence and scintillation properties of YAG : Ce single crystal and optical ceramics
VEDDA, ANNA GRAZIELLA;
2007
Abstract
We use various techniques to study optical and scintillation properties of Ce-doped yttrium aluminum garnet, Y3Al5O12 (YAG:Ce), in the form of a high-quality industrial single crystal. This was compared to optical ceramics prepared from YAG:Ce nanopowders. We present experimental data in the areas of optical absorption, radioluminescence, scintillation decay, photoelectron yield, thermally stimulated luminescence and radiation-induced absorption. The results point to an interesting feature-the absence of antisite (Y-A1, i.e. Y at the Al site) defects in optical ceramics. The scintillation decay of the ceramics is faster than that of the single crystal, but its photoelectron yield (measured with I lts integration time) is about 30-40% lower. Apart from the photoelectron yield value the YAG:Ce optical ceramic is fully comparable to a high quality industrial YAG:Ce single crystal and can become a competitive scintillator material. (C) 2006 Elsevier B.V. All rights reserved.
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