海水就地γ谱仪能谱温漂修正研究  

Study on Temperature Drift Correction of Energy Spectrum from Seawater in-situ γ-ray Spectrometer

作　　者：方登富[1] 李强[1] 唐智辉 崔伟[1] 商洁[1] 韦应靖[1] 

机构地区：[1]中国辐射防护研究院,太原030006

出　　处：《核电子学与探测技术》2017年第6期564-568,共5页Nuclear Electronics & Detection Technology

摘　　要：介绍了基于NaI(Tl)探测器的海水就地γ谱仪测量能谱的温漂修正方法。该方法改进了POE的温度补偿装置,通过设计实验探索了γ谱仪测量能谱随温度变化的函数关系,同时利用曲线拟合方法得到的修正函数对测量能谱进行修正。实验结果表明:γ谱仪测量能谱的峰位偏移与温度变化有一定的对应关系,通过60Co和152Eu的能谱修正实验验证了修正函数的有效性。此方法为海水放射性核素识别及核素活度的准确测量提供了参考。The method on temperature drift correction of energy spectrum measured by seawater in-situ γ-ray spectrometer composed of NaI（Tl） detector is studied. The method is based on the improvement of temperature compensation device powered by POE to design the experiment and explore the function relationship of measuring energy spectrum with temperature. Meanwhile the correction function about the peak shift with temperature is obtained utilizing curve fitting and used to correct the peak shift. The results show that the certain correspondence between the peak shift of the energy spectrum from γ spectrometer and the temperature variation is observed. The validity of the modified function is verified by the60 Co and152 Eu. Finally,this method provides a reference for the accurate measurement of seawater radionuclide recognition and nuclide activity.

关 键 词：NAI(TL)探测器 温漂修正 测量装置 曲线拟合 

分 类 号：O571.1[理学—粒子物理与原子核物理]