2014年度全国放射性核素γ能谱分析质量控制比对  

Nationwide intercomparison for radionuclide analyses through γ-spectrometry method in 2014

作　　者：拓飞[1] 张庆[1] 张京[1] 周强[1] 李文红[1] 徐翠华[1] 苏旭[1] 

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,北京100088

出　　处：《国际放射医学核医学杂志》2015年第5期401-404,共4页International Journal of Radiation Medicine and Nuclear Medicine

基　　金：国家科技支撑计划（2013BAK03B05）

摘　　要：目的 提高放射卫生技术服务机构检测人员的技术水平和分析能力,进一步促进全国γ能谱实验室放射性核素检测技术的发展.方法 组织2014年度全国放射性核素γ能谱分析方法比对,比对基质为土壤样品,要求参加比对的单位分析测量样品中放射性核素40K、137Cs、208Tl和228Ac的比活度.结果 提交结果报告的31家比对单位中,比对结果合格的有26家,不合格的有5家,有2家单位的比对结果获得优秀.所有参加比对的单位的整体合格率为84％（26/31）,优秀率为6％（2/31）.结论 参加比对的多数单位具备较高的检测能力和水平,其出具的检测结果准确可靠.在日常工作中需加强对γ谱仪的维护保养,重视实验室间定期刻度,并注意采用正确的核衰变参数进行计算.Objective To improve the technical levels and analytical ability of γ-spectrometry analysts for agencies engaged in radiation measurement and assessment and to promote further advances of monitoring methods for γ-spectrometry analysis laboratories in our nation.Methods A nationwide intercomparison on γ-spectrometry measurement for activity concentration of 40K, 137Cs, 208Tl, and 208Ac in soil was organized in 2014.Results Thirty-one laboratories have participated in this intercomparison.Among these laboratories, 26 laboratories showed ＆quot;acceptable＆quot; results, which include 2 laboratories with ＆quot;excellent＆quot; status, while 5 laboratories showed ＆quot;unacceptable＆quot; results.The production percentages of ＆quot;acceptable＆quot; results and ＆quot;excellent＆quot; status are 84% （24/31） and 6% （2/31）, respectively.Conclusions The measurement values reported by most of the laboratories involved in this intercomparison showed a good agreement with the reference values.Therefore, these values may provide a reliable measurement result during measurement in γ-spectrometry analyses.However, proper operation of γ-spectrometers and its regular calibration must be further emphasized to obtain accurate measurements to improve the calculation of nuclear data in some laboratories.

关 键 词：放射性同位素 质量控制 Γ能谱 比对 

分 类 号：R197.32[医药卫生—卫生事业管理]