基于加速器质谱的尿中239Pu测量方法研究  

Study on Measurement of 239Pu in Urine Based on AMS

作　　者：骆志平[1] 郑国文[1] 庞洪超[1] 何明[1] 汪传高[1] 陈凌[1] 邬蒙蒙[1] 侯术果 LUO Zhiping;ZHENG Guowen;PANG Hongchao;HE Ming;WANG Chuangao;CHEN Ling;WU Mengmeng;HOU Shuguo(China Institute of Atomic Energy,Beijing 102413,China)

机构地区：[1]中国原子能科学研究院

出　　处：《原子能科学技术》2019年第11期2317-2320,共4页Atomic Energy Science and Technology

摘　　要：239Pu作为一种长寿命极毒核素可通过吸入、食入和伤口渗入等途径进入人体,给工作人员造成内照射危害。目前一般采用尿样测量的方法评价职业人员内照射,现有尿中钚的测量手段有低本底α谱仪、热电离质谱仪、电感耦合等离子体质谱仪及加速器质谱仪等。加速器质谱对239Pu的测量可达更低的探测限,这对准确评价工作人员内照射剂量具有重要意义。利用中国原子能科学研究院自行研制的加速器质谱仪开展了尿中239Pu的前处理流程研究及239Pu高灵敏测量方法研究,方法检出限为1.1μBq(0.47fg),该方法可为保障工作人员的辐射安全提供技术支持。As a long-lived extreme toxic nuclide,239 Pu can enter the human body through inhalation,ingestion and wound infiltration,causing internal exposure to occupational personnel.Presently,urine sample measurement is generally used to evaluate internal exposure of occupational personnel.Existing methods for measuring plutonium in urine include low background alpha spectrometer,thermal ionization mass spectrometer(TIMS),inductively coupled plasma mass spectrometer(ICP-MS),and accelerator mass spectrometer(AMS).Because AMS method can achieve lower detection limit for the measurement of 239 Pu,it is of great significance for accurate evaluation of the internal dose of occupational personnel.Using the self-developed AMS of China Institute of Atomic Energy(CIAE),the pretreatment process and the high-sensitivity measurement method of 239 Pu in urine,whose detection limit is 1.1μBq(0.47 fg),were carried out and it can provide technical support to ensure the radiation safety of occupational personnel.

关 键 词：加速器质谱 尿样 钚 前处理 检出限 

分 类 号：TL81[核科学技术—核技术及应用]