We investigate scintillation properties and energy trapping processes in Pr-doped Lu 3Al 5O 12(Pr:LuAG) optical ceramics, specifically focusing on the effects of sintering aids. Ceramics with good transmittance and scintillation properties comparable with those of single crystals were obtained without the use of sintering aids. Their introduction caused a transparency improvement, accompanied, however, by a deterioration of scintillation properties in terms of light yield and time decay. We interpret the results, discussing the role of aliovalent sintering agents on the formation of point defects acting as traps affecting the transport of charge carriers to the luminescence centers.
Shen, Y., Shi, Y., Feng, X., Pan, Y., Li, J., Zeng, Y., et al. (2012). The Harmful Effects of Sintering Aids in Pr:LuAG Optical Ceramic Scintillator. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 95(7), 2130-2132 [10.1111/j.1551-2916.2012.05275.x].
The Harmful Effects of Sintering Aids in Pr:LuAG Optical Ceramic Scintillator
VEDDA, ANNA GRAZIELLA;MORETTI, FEDERICO
2012
Abstract
We investigate scintillation properties and energy trapping processes in Pr-doped Lu 3Al 5O 12(Pr:LuAG) optical ceramics, specifically focusing on the effects of sintering aids. Ceramics with good transmittance and scintillation properties comparable with those of single crystals were obtained without the use of sintering aids. Their introduction caused a transparency improvement, accompanied, however, by a deterioration of scintillation properties in terms of light yield and time decay. We interpret the results, discussing the role of aliovalent sintering agents on the formation of point defects acting as traps affecting the transport of charge carriers to the luminescence centers.
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