Author:
Hu P.,Hua Z.H.,Ma L.S.,Qian S.,Wu Q.,Wang Z.G.
Abstract
Abstract
The cerium-doped lutetium yttrium silicate (LYSO:Ce) crystal
has many advantages such as high light output and fast decay time,
showing great potential to improve the performance of scintillation
detectors. Silicon photomultipliers (SiPMs) are high-performance
semiconductor photodetectors, which generally have a higher photon
detection efficiency than photomultiplier tubes (PMTs) and are
beneficial to realize a better energy resolution. The energy
resolution and detected light output of SiPM-coupled LYSO:Ce
crystals were studied by optimizing the photon detection efficiency
(PDE), the operating voltage, the wrapper, the surface finish and
the coupling method between the SiPM and crystal. Considering the
output saturation of SiPMs in high light intensity, a preliminary
correction method was applied to the saturation response of SiPMs
and energy resolution of 662 keV gamma-rays from 137Cs was
obtained after correction. The results show that the optimized
energy resolution at 662 keV measured by the SiPM of 50 μm
microcells can reach 7.6%. The light output of the polished and
rough crystal detected by a SiPM of 10 μm microcells were
also measured, which can reach 27000 ± 3200 photons/MeV and
36000 ± 3700 photons/MeV, respectively.
Subject
Mathematical Physics,Instrumentation
Cited by
1 articles.
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