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A kind of bilayer structure ceramic scintillators designed for phoswich detectors
Author(s) -
Hu Zewang,
Chen Xiaopu,
Ding Dongzhou,
Cao Maoqing,
Shi Yun,
Kou Huamin,
Chen Haohong,
Xie Tengfei,
Wu Lexiang,
Pan Yubai,
Li Jiang
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15080
Subject(s) - scintillator , bilayer , ceramic , materials science , scintillation , detector , microstructure , stacking , optics , layer (electronics) , optoelectronics , physics , composite material , nuclear magnetic resonance , chemistry , membrane , biochemistry
Abstract The phoswich detectors can determine the location of nuclear interactions with the matrix and it is an effective approach to improve the spatial resolution at the edge of the field of view in positron emission tomography. In this study, we proposed a kind of bilayer structure garnet ceramic scintillators for phoswich detectors. Bilayer Pr:Lu AG /Ce:Lu AG ceramic scintillations with different thickness ratio were fabricated through solid‐state reaction and vacuum sintering without further cutting or stacking process. The phase, microstructure, fluorescence, and scintillation properties were characterized and studied. The decay time of the Pr:Lu AG layer was about 21.8 ns while that of the Ce:Lu AG layer was 58.6 ns. Different 5d‐4f emission bands of 290‐450 and 475‐700 nm were observed in the Pr:Lu AG layer and Ce:Lu AG layer, respectively. These two features meet the basic requirements of phoswich detectors. Separation of interactions with γ‐ray in different layers has achieved in the pulse height spectra. These properties reveal that this kind of multilayer structure garnet ceramic scintillators have potential application value in the field of phoswich detectors.

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