现代应用物理2025，Vol.16Issue(4)：56-64,9.DOI:10.12061/j.issn.2095-6223.202411014
低水平放射性核素活度测量中的母子体衰变校正技术
Decay Correction Method for the Parent and Daughter Nuclides in Low-Level Radionuclide Activity Analysis
摘要
Abstract
Radionuclide monitoring under the Comprehensive Nuclear-Test-Ban Treaty(CTBT)falls within the scope of low-level radioactivity measurement.To enhance radionuclide detection sensitivity,long-duration measurements are typically required.Thus,the decay of radionuclides in the sample during the measurement process cannot be neglected and it is essential to conduct the decay correction for the parent and daughter nuclides in low-level radionuclide activity analysis.For nuclides with short half-lives or nuclides with decay chains,the decay correction becomes complicated.This paper investigates parent-daughter decay correction techniques using gamma-spectrometry data from CTBT proficiency test aerosol samples(2005-2022).Focusing on representative decay chains such as 99Mo-99mTc,129mTe-129Te,125Sn-125Sb,95Zr-95mNb-95Nb,and 127Sb-127mTe-127Te,this study conducted research on decay correction techniques for parent-daughter nuclides,summarized calculation methods for radioactive activity of parent-daughter nuclides,and compared radioactive activity with reference activities.Comparisons between measured radioactive activities and reference activities are performed.The results show that the decay correction method for the parent and daughter nuclides to determine low-level radionuclide activities achieves high accuracy,with relative deviations between measured and reference activities for both major and minor nuclides remaining within 12%.Furthermore,this method exhibits the capability to identify potentially existing nuclides,thereby validating its accuracy and effectiveness.关键词
母子体衰变校正/HPGe γ能谱法/低水平放射性核素活度测量/CTBT气溶胶样品能力验证Key words
decay correction for the parent and the daughter nuclides/HPGe γ spectrometry/low-level radionuclide activity analysis/CTBT PTE on particulate samples分类
能源科技引用本文复制引用
张瑞芹,王颖,王世联,李奇,樊元庆,赵允刚,牛亚洲,贾怀茂,张新军,郭启隆,李芮莹..低水平放射性核素活度测量中的母子体衰变校正技术[J].现代应用物理,2025,16(4):56-64,9.基金项目
国家重点研发计划资助项目(2022YFF0607300) （2022YFF0607300）
