LabSOCS在级联辐射引起的符合相加修正上的应用  

Application of LabSOCS in coincidence summing correction by cascade radiation

作　　者：孔令南 杨宝路 王硕[1] 张京[1] 周强[1] Kong Lingnan;Yang Baolu;Wang Shuo;Zhang Jing;Zhou Qiang(Key Laboratory of Radiological Protection and Nuclear Emergency,China CDC,WHO Collaborating Centre for Radiation and Health,National Institute for Radiological Protection,Chinese Center for Disease Control and Prevention,Beijing 100088,China)

机构地区：[1]中国疾病预防控制中心辐射防护与核安全医学所,辐射防护与核应急中国疾病预防控制中心重点实验室,世界卫生组织辐射与健康合作中心,北京100088

出　　处：《中华放射医学与防护杂志》2024年第4期298-304,共7页Chinese Journal of Radiological Medicine and Protection

摘　　要：目的探索LabSOCS无源效率刻度在级联辐射引起的符合相加修正上的应用。方法利用LabSOCS无源效率刻度软件生成4个标准源的模拟效率曲线,使用实验室高纯锗γ能谱仪测量这4个标准源,在活度分析时计算符合相加修正因子,对测量结果进行符合相加修正,将修正后的放射性活度与证书活度进行比较,并使用GB/T 28043-2019/ISO 13528∶2015中能力评定统计量En值评定。结果测量结果活度值与证书活度值进行比较,符合相加修正后偏差绝对值范围在0.14%~3.87%,且统计量En值绝对值均<1。结论LabSOCS在级联辐射引起的符合相加修正上的应用效果较为理想,符合相加修正后的活度值与证书活度值偏差不大,其能力评定结果是合格的。Objective To explore the application of laboratory sourceless calibration software(LabSOCS)in coincidence summing correction for cascade radiation.Methods LabSOCS was employed to plot the simulated efficiency curves of four standard source samples.The radioactivity of these samples was measured using a high purity germanium(HPGe)gamma ray spectrometer at the laboratory.Then the coincidence summing correction factors were calculated during the analysis of their radioactivity,followed by the coincidence summing correction for the measured radioactivity.The corrected radioactivity was compared with the certificate activity values and was then assessed based on the statistical En scores for proficiency testing stipulated in GB/T 28043-2019/ISO 13528∶2015.Results The comparison between the measured radioactivity and the certificate activity values of the standard source samples revealed that the absolute deviation of the measured radioactivity after coincidence summing correction ranged from 0.14%to 3.87%and the absolute values of the statistical En scores were all<1.Conclusions The application of LabSOCS to the coincidence summing correction caused by cascade radiation can yield ideal result,with the corrected radioactivity exhibiting little deviation from the certificate activity values,indicating qualified proficiency testing result.

关 键 词：符合相加 Γ能谱仪 无源效率刻度 

分 类 号：R81[医药卫生—放射医学]