二异丙基萘基质^(3)H和^(14)C液闪标准源的稳定性与淬灭校正准确性研究  

Stability and Quenching Correction Accuracy Study of ^(3)H&^(14)C LiquidScintillation Reference Sources Based on Diisopropylnaphthalene

作　　者：肖扬 张辉 马彦 刘玫玲 刘皓然[1] 梁珺成[1] 张津肇 赵清[1] 范梓浩 张晗 刘鹏 范富有 戴雄新 XIAO Yang;ZHANG Hui;MA Yan;LIU Meiling;LIU Haoran;LIANG Juncheng;ZHANG Jinzhao;ZHAO Qing;FAN Zihao;ZHANG Han;LIU Peng;FAN Fuyou;DAI Xiongxin(National Institute of Metrology,Beijing 100029,China;China Institute for Radiation Protection,Taiyuan,Shanxi 030006,China;Shanxi Provincial Key Laboratory for Translational Nuclear Medicine&Precision Protection,Taiyuan,Shanxi 030006,China;Yantai Research Institute,Harbin Engineering University,Yantai,Shandong 264000,China)

机构地区：[1]中国计量科学研究院,北京100029 [2]中国辐射防护研究院,山西太原030006 [3]核药研发转化与精准防护山西省重点实验室,山西太原030006 [4]哈尔滨工程大学烟台研究院,山东烟台264000

出　　处：《计量学报》2024年第11期1738-1744,共7页Acta Metrologica Sinica

基　　金：国家自然科学基金(22106158)。

摘　　要：为了建立商用液闪液分析水溶液样品中^(3)H、^(14)C的淬灭校正方法,基于二异丙基萘(Diisopropylnaphthalene,DIN)液闪液制备了^(3)H无淬灭液闪标准源、^(3)H淬灭系列液闪标准源、^(14)C无淬灭液闪标准源和^(14)C淬灭系列液闪标准源。考察了室温、避光条件下标准源的稳定性,16个月后淬灭系列标准源的校正效率的变化小于0.5%,无淬灭^(3)H、^(14)C标准源的活度值和tSIE值在30个月的监测中斜率统计值均小于临界值,未观察到不稳定性。比较了DIN体系淬灭系列标准源与甲苯体系淬灭系列标准源对商用液闪液测量核素的校正准确性,结果表明DIN基质的淬灭系列标准源更适用于目前广泛使用的商用闪烁液(Ultima Gold^(TM)AB、Ultima Gold^(TM)LLT、Optiphase HiSafe 3)测试样品的淬灭校正。To establish a quenching correction method for ^(3)H and ^(14)C in aqueous samples with commercial liquid scintillation cocktails,unquenched reference sources and quenched series reference sources of ^(3)H and ^(14)C were prepared with DIN(Diisopropylnaphthalene)scintillation cocktails.The stability of the reference sources was investigated in dark condition at room temperature.The change of the correction efficiency of the quenched series of reference sources was less than 0.5%after 16 months.The slopes of activity and tSIE of the unquenching reference sources of ^(3)H and ^(14)C were lower than the critical value during 30 months,which meant that these reference sources were stable.The quenching correction accuracy of toluene and DIN quenched series reference sources was compared by correcting ^(3)H and ^(14)C samples consisted of different commercial liquid scintillation cocktails.As a result,the correction curve of DIN reference sources was more suitable for commercial liquid scintillation cocktails such as Ultima Gold ^(TM) AB,Ultima Gold ^(TM) LLT and Optiphase HiSafe 3.

关 键 词：电离辐射计量 二异丙基萘 液闪 淬灭 ^(3)H ^(14)C 稳定性 

分 类 号：TB98[一般工业技术—计量学]