^(10)Be/~9Be标准样品的制备和加速器质谱测量  

Preparation and Accelerator Mass Spectrometry Determination of ^(10)Be/~9Be Standard Reference Material

作　　者：李世红[1] 何明[1] 姜山[1] 董克君[1] 管永精[1] 武绍勇[1] 林敏[1] 丁艳秋[1] 林盛中[2] 

机构地区：[1]中国原子能科学研究院核物理研究所,北京102413 [2]中国地质科学院矿产资源研究所,北京100037

出　　处：《原子能科学技术》2006年第5期610-613,共4页Atomic Energy Science and Technology

摘　　要：采用同位素稀释法由10Be标准参考物质SRM 4325制备系列10Be/9Be标准样品,在北京HI-13串列加速器的AMS系统上对该系列标准(n(10Be)/n(9Be)范围为2.68×10-11~2.38×10-12)进行测量。测量结果显示,n(10Be)/n(9Be)测量值与标称值呈良好线性关系,且归一化后的测量值与标称值吻合。该系列标准可用于北京HI-13串列加速器的AMS系统对地质环境样品中10Be/9Be绝对比值的准确测定。By dilution of ^10Be reference material（SRM 4235） with natural beryllium, the ^10Be/^9Be standard samples were prepared to be used as AMS standard. 4 ^10Be/^9Be samples with n（^10Be）/n（^9Be） range from 2.68× 10^-11 to 2.38× 10^-12 were checked by AMS at the HI-13 tandem in CIAE. The measured results show the excellent linear relation- ship between measured values and respective nominal values for ^10Be/^9Be standard samples. Moreover, normalized measured values are in good agreement with their nominal values. The prepared ^10Be/^9Be standard samples can be used for accurate AMS measurements of environmental ^10Be/^9Be.

关 键 词：^10Be/^9Be标准参考物质 制备 加速器质谱法 

分 类 号：TL5[核科学技术—核技术及应用]