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Comparative studies of Lu 3 Al 5 O 12 :Ce and Y 3 Al 5 O 12 :Ce scintillators for gamma‐ray detection
Author(s) -
Chewpraditkul W.,
Swiderski L.,
Moszynski M.,
Szczesniak T.,
SyntfeldKazuch A.,
Wanarak C.,
Limsuwan P.
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200925161
Subject(s) - scintillator , scintillation , photoelectric effect , photomultiplier , crystal (programming language) , materials science , optics , physics , analytical chemistry (journal) , lyso , phosphor , coincidence , detector , optoelectronics , chemistry , chromatography , computer science , programming language , medicine , alternative medicine , pathology
The performance of Lu 3 Al 5 O 12 :Ce (LuAG:Ce) and Y 3 Al 5 O 12 :Ce (YAG:Ce) scintillators were compared under γ‐ray excitation using photomultiplier tube (PMT) readout. Light yield non‐proportionality and energy resolution were measured with a Photonis XP5500B PMT. The energy resolution, obtained in this work for 662 keV γ‐rays, was 6.7 and 7.0%, respectively, for LuAG:Ce and YAG:Ce detectors. A fast component in the scintillation decay of LuAG:Ce crystal is faster than that of YAG:Ce crystal, whereas the relative intensity of a fast component for YAG:Ce crystal is higher than that of LuAG:Ce crystal. The coincidence time resolution, obtained in this work for 511 keV annihilation quanta, was 583 and 660 ps, respectively, for LuAG:Ce‐ and YAG:Ce‐based detectors in coincidence experiment together with a BaF 2 scintillation detector. Normalized coincidence time resolution was also discussed in terms of a number of photoelectrons and decay time of the light pulse.