级联符合对天然放射性核素镭-226 γ能谱测量的影响分析  

Analysis of Coincidence Effect on Natural Radionuclides Radium-226 Measuring by γ Spectrometry

作　　者：周程[1] 刘晓平[1] 

机构地区：[1]江苏省辐射环境监测管理站,南京210036

出　　处：《核电子学与探测技术》2012年第11期1336-1339,1323,共5页Nuclear Electronics & Detection Technology

摘　　要：介绍了226Ra的γ能谱测量方法,通过对标准样品和环境样品的测量,分析说明了利用214Pb的特征γ射线全能峰(351.93和295.22 keV)来测定母体226Ra的活度是准确可靠的,214Bi的特征γ射线全能峰609.32 keV存在严重的级联符合相加,也说明了在利用存在级联跃迁的特征γ射线进行活度计算时应对测量结果进行校正。It introduces the γ-ray spectrometry method for 226Ra measurement. By measuring standard samples and environmental samples , analysis shows that the use of the γ characteristics peak （ 351.93 keV and 295.22 keV） of 214Pb to determine the activity of the parent 226Ra is reliable, cascade coincidence summing is seriously around γ - ray characteristics peak（609.32 keV） of 214Bi , also illustrates results of activity should be corrected once using γ characteristics peaks exist cascade.

关 键 词：^226RA ^214pb ^214Bi Γ能谱 级联符合 

分 类 号：TL817[核科学技术—核技术及应用]