液闪三双符合比(TDCR)淬灭校正方法研究  

Study on Quenching Correction by the Triple-to-double Coincidence Ratio(TDCR)Method of Liquid Scintillation Spectrometer

作　　者：祁烨林 来永芳 黄伟奇 张煊 QI Yelin;LAI Yongfang;HUANG Weiqi;ZHANG Xuan(Institute of NBC Defense PLA Army,Beijing 102205,China;Unit 32368,Beijing 100042,China)

机构地区：[1]陆军防化学院,北京102205 [2]中国人民解放军32368部队,北京100042

出　　处：《核电子学与探测技术》2023年第3期484-489,共6页Nuclear Electronics & Detection Technology

摘　　要：液闪测量方法具有自吸收少、探测效率高、样品处理简单等优点,广泛应用于环境辐射测量。在液闪测量中,淬灭是普遍存在的问题,依靠SIM-MAX LSA3000B液闪谱仪的实验平台,通过实验研究了环境温湿度、样品/闪烁液比值、水样活度浓度和闪烁液种类对淬灭曲线的影响,结果显示TDCR淬灭校正方法环境适应性好,受样品/闪烁液比值影响小,受闪烁液种类影响大,高活度浓度样品曲线一致但不适用于低活度浓度测量,所做研究为液闪TDCR淬灭校正方法应用提供了基本遵循。Liquid scintillation measurement method has the advantages of less self absorption,high detection efficiency and simple sample processing,which is widely used in environmental radiation measurement.In liquid scintillation measurement,quenching is a common problem.In this paper,the influence of ambient temperature and humidity,sample/scintillation liquid ratio,water activity concentration and scintillation liquid type on quenching curve is experimentally studied by relying on the experimental platform of SIM-MAX LSA3000B.The results show that TDCR quenching correction method has good environmental adaptability,which is less affected by the sample/scintillation liquid ratio and more affected by the type of scintillation liquid.The curves of high activity concentration samples are consistent,but they are not suitable for the measurement of low activity concentration.The research provides a basic basis for the application of liquid flash TDCR quenching correction method.

关 键 词：液闪 淬灭 TDCR 淬灭校正 

分 类 号：TL81[核科学技术—核技术及应用]