两种符合计数方法测定131I核素活度

罗丽峰; 刘皓然; 梁珺成; 范富有; 张明; 徐强

doi:10.3969/j.issn.1000-1158.2023.07.19

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计量学报 ›› 2023, Vol. 44 ›› Issue (7) : 1128-1133. DOI: 10.3969/j.issn.1000-1158.2023.07.19

电离辐射、标准物质与生物计量

两种符合计数方法测定¹³¹I核素活度

罗丽峰^1,2,刘皓然²,梁珺成²,范富有²,张明²,徐强¹

作者信息 +

Activity Determination of ¹³¹I by Means of Two Coincidence Counting Methods

LUO Li-feng^1,2,LIU Hao-ran²,LIANG Jun-cheng²,FAN Fu-you²,ZHANG Ming²,XU Qiang¹

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文章历史 +

摘要

采用4πβ(LS)-γ与4πβ(PC)-γ 2种数字符合计数法对放射性核素¹³¹I进行了活度测量,并对这2种方法得到的测量结果进行了不确定度评定。β道分别采用了以氩甲烷为工作气体的流气式正比计数器(PC)和制样简单的液体闪烁计数器(LSC)探测β射线。同时,运用可实现短寿命核素活度测量的数字符合计数法对β、γ脉冲序列文件进行离线处理,经过死时间修正和符合分辨时间修正后,给出用于效率外推的符合计数。结果表明,2种测量方法得到的¹³¹I核素的比活度在不确定度范围内一致,相对标准偏差为0.27%。

Abstract

Activity measurements of ¹³¹I were performed by 4πβ(LS)-γ and 4πβ(PC)-γ digital coincidence counting methods, respectively. And the uncertainty of the results obtained by the two methods were also evaluated. The β-ray was detected by a flow-gas proportional counter(PC) operated with a mixture of argon and methane as the working gas and a liquid scintillation counter(LSC) with simple sample preparation, respectively. After that, the digital coincidence counting technique which detects the short-lived nuclides appropriately was used to processed the β、γ list mode file offline. The coincidence counts for efficiency extrapolation were given after dead time correction and coincidence resolution time correction. It shows that the results of ¹³¹I obtained by the two methods are consistent in the range of uncertainty, and the relative standard deviation is 0.27%.

导出引用

罗丽峰,刘皓然,梁珺成,范富有,张明,徐强. 两种符合计数方法测定¹³¹I核素活度[J]. 计量学报. 2023, 44(7): 1128-1133 https://doi.org/10.3969/j.issn.1000-1158.2023.07.19

LUO Li-feng,LIU Hao-ran,LIANG Jun-cheng,FAN Fu-you,ZHANG Ming,XU Qiang. Activity Determination of ¹³¹I by Means of Two Coincidence Counting Methods[J]. Acta Metrologica Sinica. 2023, 44(7): 1128-1133 https://doi.org/10.3969/j.issn.1000-1158.2023.07.19

中图分类号： TB98

参考文献

［1］石峰, 柴文文. 甲状腺功能亢进131I治疗进展及争议［J］. 医学与哲学, 2013, 34(9B):12-15.
Shi F, Chai W W. The recent advances in the treatment of thyroid function hyperfunction of 131I and controversy［J］. Medicine and philosophy, 2013, 34(9B):12-15.
［2］Bé M M, Chisté V, Dulieu C, et al. Table of radionuclides［Z］. 2004.
［3］Günther E W. Standardization of 59Fe and 131I by liquid scintillation counting［J］. Nuclear Instruments and Methods in Physics Research Section A:Accelerators,Spectrometers Detectors and Associated Equipment, 1994, 339(1-2):402-407.
［4］姚顺和. 4πβ(PPC)-γ(HPGe)反符合测量方法研究［D］. 北京:中国原子能科学研究院, 2007.
［5］杨丽艳, 汪建清, 姚顺和, 等. 反符合法测量152Eu放射性溶液的活度［J］. 原子能科学技术, 2008,42(4):296-299.
Yang L Y, Wang J Q, Yao S H, et al. Activity Standardization of 152Eu by Anti-coincidence Method［J］. Atomic Energy Science and Technology, 2008,42(4):296-299.
［6］Zhong K, Liu H, Zhou Q, et al. A New DCC Software for 4πβ(LS)-γ Coincidence Counting［J］. IEEE Transactions on Nuclear Science, 2021, 68(8): 1920-1926.
［7］Sahagia M, Razdolescu A C, Ivan C, et al. Assurance of the traceability chain for 131I measurement［J］. Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine, 2008, 66(4):539-544.
［8］Kulkarni D B, Anuradha R, Reddy P J, et al. Standardization of 131I: Implementation of CIEMAT/NIST method at BARC, India［J］. Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine, 2011, 69(10):1512-1515.
［9］Kulkarni D B, Anuradha R, Joseph L, et al. Development of liquid scintillation based 4πβ(LS)-γ coincidence counting system and demonstration of its performance by standardization of 60Co［J］. Appl Radiat Isot, 2013, 72(Complete):68-72.
［10］Kulkarni D B. Performance demonstration of 4πβ(LS)-γ coincidence counting systemcross for standardization of radionuclides with complex decay scheme［J］. Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine, 2016, 108:24-29.
［11］唐豪. 基于数字符合装置的60Co与54Mn活度绝对测量方法实验研究［D］. 南昌:东华理工大学.
［12］Baerg A P. Measurement of Radioactive Disintegration Rate by the Coincidence Method［J］. Metrologia, 1966, 2(1):23-32.
［13］Campion P J. The standardization of radioisotopes by the beta-gamma coincidence method using high efficiency detectors［J］. International Journal of Applied Radiation & Isotopes, 1959, 4(3-4):232,IN15,241-240,IN16,248.
［14］Zhang M, Yao S, Liang J, et al. Standardization of the radionuclides 60Co and 59Fe by digital 4πβ(PC)-γ(NaI) coincidence counting［J］. Applied Radiation & Isotopes, 2016, 109:341-344.
［15］Fitzgerald R, Bailat C, Bobin C, et al. Uncertainties in 4πβ-γ coincidence counting［J］. Metrologia, 2015, 52(3):S86-S96.
［16］JJF 1059.1—2012,测量不确定度评定与表示［S］.
［17］刘佳煜, 郭涛, 朱惠臣, 等. 气载氚监测仪校准用氚化甲烷体积活度测量方法及其不确定度分析［J］. 计量学报, 2022, 43(1): 114-119.
Liu J Y, Guo T, Zhu H C,et al.Measurement Method of Volume Radioactivity of Tritiated Methane for Airborne Tritium Monitors Calibration and Its Uncertainty Analysis［J］. Acta Metrologica Sinica, 2022, 43(1): 114-119.
［18］唐豪,范富有,梁珺成, 等.4πβ(PC)-γ符合法测量60Co核素活度及不确定度评定［J］. 计量学报, 2020, 41(11): 1425-1430.
Tang H,Fan F Y,Liang J C,et al.Evaluation of 60Co Nuclide Activity and Uncertainty by 4πβ(PC)-γ Coincidence Method［J］. Acta Metrologica Sinica, 2020, 41(11): 1425-1430.