Research on temperature peak-shift correction methods for NaI (Tl) gamma spectrum

VernacularTitle:基于NaI (Tl) γ能谱温漂修正方法研究
Author: Dengfu FANG ¹ ; Yingjing WEI ¹ ; Wei CUI ¹ ; Mei FENG ¹ ; Zhihui TANG ¹ ; Zhigang LI ¹ ; Hengguan YI ¹
Author Information

1. China Institute for Radiation Protection, Taiyuan 030006 China.
Publication Type:RadiationMonitoring/OriginalArticles
Keywords: NaI Detector; Measurement of Energy Spectrum; Correction of Temperature Peak-Shift; Full-Energy-Peak
From: Chinese Journal of Radiological Health 2021;30(1):19-23
CountryChina
Language:Chinese
Abstract: Objective The experiment project was designed to explore the variation of NaI (Tl) gamma spectrometer channels with environmental temperature. ⁶⁰Co and ¹⁵²Eu were used to verify the reliability of the correction methods. Methods Two correction methods were applicated, which were curve fitting correction method and known measurement peak correction method. Results The experimental results showed that temperature changes had an effect on NaI (Tl) measured spectra peak. The relative peak will shift to the right at 5℃ by 9.6%, and to the left at 60℃ by 16%, with the reference temperature set at 25℃. The two methods are based on the channel change due to temperature changes, and they could effectively correct the temperature peak-drift. Conclusion In order to make the measured spectrum information accurate and reliable in field monitoring, it is suggested to monitor the environmental temperature so as to correct the measured data.