Gamma spectrum measured by an NaI(Tl) detector is known to be unstable with the in situ temperature. In the present work, an advanced method has been applied to stabilize the gamma spectrum measured by the NaI(Tl) detector at environmental radiation monitoring (ERM) stations. The method is based on experimental data obtained under controlled conditions in laboratory. In the temperature range from 4 to 45°C, the relative deviation of the peak positions within the stabilized gamma spectrum is less than 2%. To test this method in a real scenario, it has been integrated into the ERM station at the Military Institute of Chemical and Environmental Engineering in Hanoi, Vietnam. The results show that the proposed method is ready for a real application.

中文翻译：

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使用 NAI(TL) 探测器的环境辐射监测站的伽马光谱稳定。

已知由 NaI(Tl) 检测器测量的伽马光谱在原位温度下不稳定。在目前的工作中，已应用一种先进的方法来稳定环境辐射监测 (ERM) 站的 NaI(Tl) 探测器测量的伽马光谱。该方法基于在实验室受控条件下获得的实验数据。在 4 到 45°C 的温度范围内，稳定伽马光谱内峰值位置的相对偏差小于 2%。为了在真实场景中测试这种方法，它已被集成到越南河内化学与环境工程军事学院的 ERM 站中。结果表明，所提出的方法已准备好用于实际应用。