符合效率示踪法测量^(99)Tc活度  

Activity Measurement of ^(99)Tc by Coincidence Efficiency Tracing Method

作　　者：李谋[1] 代义华[1] 刘德敏[1] 许启初[1] 白涛[1] 方荃[1] 商建波[1,2] 黄萍[1] 钟振原[1] 常永福[1] 

机构地区：[1]西北核技术研究所,陕西西安710024 [2]清华大学,北京100084

出　　处：《原子能科学技术》2011年第11期1285-1288,共4页Atomic Energy Science and Technology

摘　　要：利用60 Co作为示踪核素,采用4πβ-γ符合法绝对测量了示踪核素60 Co溶液和60 Co+99 Tc混合溶液的比活度,采用效率示踪法计算得到被示踪核素99 Tc溶液的比活度,最终标定99 Tc溶液的比活度为(70.8±1.8)Bq.mg-1(k=2),满足计量保障要求。The specific activity of 60Co radioactive solution and 60Co＋99Tc mixing solution was absolutely measured by coincidence method.The specific activity of 99Tc solution was calculated by efficiency tracing method with 60Co as tracer isotope.Final result is that the specific activity of 99Tc solution is（70.8±1.8） Bq·mg-1（k=2）,which can meet the need of measurement task.

关 键 词：活度测量 4πβ-γ符合法 效率示踪法 

分 类 号：TL84[核科学技术—核技术及应用]