The radiation-monitoring systems of miniaturized unmanned aerial vehicles (UAVs) have wide-ranging applications. However, the load capacity and flight time of radiation-monitoring systems of UAVs are limited. Thus, a lightweight and low-power radiation monitoring load is significant to develop. Herein, a lightweight CeBr₃ gamma-ray spectrometer based on Silicon photomultiplier (SiPM) was developed for small-UAV radiation-monitoring systems. Experiments were conducted to test the performance of the spectrometer. Excellent linearity and high energy resolution were achieved. Compared with the traditional CeBr₃ scintillator gamma-ray spectrometer, the volume, mass, and power consumption of the spectrometer decreased by 73%, 55%, and 38%, respectively. Carrying the spectrometer developed in this paper can increase the compactness and flight time of small-UAV radiation-monitoring systems.

微型无人机（UAV）的辐射监测系统具有广泛的应用。然而，无人机辐射监测系统的负载能力和飞行时间是有限的。因此，开发轻量级、低功率的辐射监测负载具有重要意义。在此，为小型无人机辐射监测系统开发了一种基于硅光电倍增管 (SiPM)的轻型 CeBr ₃伽马射线光谱仪。进行实验以测试光谱仪的性能。实现了优异的线性度和高能量分辨率。与传统的CeBr ₃相比闪烁γ射线光谱仪，光谱仪的体积、质量和功耗分别下降了73%、55%和38%。携带本文开发的光谱仪可以增加小型无人机辐射监测系统的紧凑性和飞行时间。