Iren Emre, Yetkin Taylan, Kolcu Onur Bugra, Ozok Ferhat, Erduran Mustafa Nizamettin
Mimar Sinan Fine Arts University, Sisli, Istanbul, 34360, Turkiye.
Istinye University, Sariyer, Istanbul, 34450, Turkiye.
Appl Radiat Isot. 2025 Nov;225:111958. doi: 10.1016/j.apradiso.2025.111958. Epub 2025 Jun 16.
In this study, we present a simple statistical model to show the relationship between the number of Silicon Photomultipliers (SiPMs) and the energy resolution of the detector. We used bismuth germanate (BGO) crystals in combination with varying numbers of SiPMs to examine the effect of photodetector count on energy resolution. We compared our results with Photomultiplier Tube-based measurements to determine the advantage of SiPMs in terms of energy resolution. We also performed a simulation study with the GEANT4 simulation package to investigate the energy resolution that can be achieved under ideal conditions by using a higher number of SiPMs. The experimental measurements showed that for a photopeak energy of 511 keV, an energy resolution of 29.9% was achieved using five SiPMs covering only 3.25% of the scintillator area, whereas a Photomultiplier Tube (PMT) covering 37% of the same area resulted in an energy resolution of about 23.4%. As a result of the simulation study, it is predicted that the energy resolution can be achieved up to 14.8% for a photopeak energy of 511 keV by using 21 symmetrically distributed SiPM.
在本研究中，我们提出了一个简单的统计模型来展示硅光电倍增管（SiPM）数量与探测器能量分辨率之间的关系。我们将锗酸铋（BGO）晶体与不同数量的SiPM组合使用，以研究光电探测器数量对能量分辨率的影响。我们将我们的结果与基于光电倍增管的测量结果进行比较，以确定SiPM在能量分辨率方面的优势。我们还使用GEANT4模拟包进行了模拟研究，以研究在理想条件下使用更多数量的SiPM可实现的能量分辨率。实验测量表明，对于511 keV的光电峰能量，使用仅覆盖闪烁体面积3.25%的五个SiPM可实现29.9%的能量分辨率，而覆盖相同面积37%的光电倍增管（PMT）的能量分辨率约为23.4%。模拟研究的结果预测，对于511 keV的光电峰能量，使用21个对称分布的SiPM可实现高达14.8%的能量分辨率。
