Cerium-doped Yttrium Silicate scintillation crystal (Ce:YSO scintillator) belongs to monoclinic rare earth orthosilicate crystal, YSO Scintillation Crystal emits 420 nm light and couples well with PMT under the stimulation of high energy. It also has the advantage of high light yield, short decay time, and high density, non-deliquescence, and all around stable physical and chemical properties.