The energy resolution is an important performance parameter of scintillation detectors,particularly in the field of gamma-ray detection and identification applications.Light collection is a crucial factor affecting the energy resolution of scintillation detectors.In this work,we utilized the Genat4 Monte Carlo toolkit to simulate the photon transport in scintillation detectors,investigating the effects of CsI(Na)crystal shape,surface treatment,and detector readout methods on the light collection efficiency and uniformity of light collection for gamma-ray detectors.The simulation results indicate that compared to cylindrical,rectangular,and square crystals,the conical crystal have higher light collection efficiency and uniformity.Additionally,scintillation crystal surfaces exhibited improved light collection efficiency after grinding.Furthermore,the detector using double-ended readout resulted in higher light collection efficiency,with an increase of 10％up to 20％compared to single-ended readout.Finally,the results of the simulations were confirmed by carrying out measurements of the light collection efficiencies of scintillation crystals.A comparison of simulated and measured values of light output shows a consistent agreement within a 2％range.This study provides essential design principles for optimizing gamma-ray detectors to improve energy resolution.
关键词
能量分辨率/闪烁晶体/γ射线探测器/光收集效率/光收集均匀性/MC模拟
Key words
energy resolution/scintillation crystal/γ-ray detector/light collection efficiency/uniformity of light collection/Monte Carlo simulation
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