^(182)Hf的AMS测量技术研究  

AMS Measurement Technology for ^(182)Hf

作　　者：李振宇[1] 姜山[1] 何明[1] 董克君[1] 胡豪[1] 郑国文[1] 李恒[1,2] 王晓波[1,2] 谢林波[1,3] 林德雨[1,2] 窦亮[1] 武绍勇[1] 游曲波[1] 包轶文[1] 

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]广西大学物理科学与技术学院,广西南宁530004 [3]厦门大学海洋与地球学院,福建厦门361005

出　　处：《原子能科学技术》2013年第2期172-177,共6页Atomic Energy Science and Technology

摘　　要：为实现对182 Hf岩石样品的AMS精确测量,基于HI-13串列加速器对测量技术和方法等进行了系统的改进,主要包括:182 Hf空白样品的制备、偏置束流的同时监测技术、加速器系统稳定性检验、交替测量方案的实施、182 W扣除方法的改进、模拟样品测量检验、岩石样品测量检验及测量结果可信度检验等。实验结果表明,对于1×10-10(182 Hf/180 Hf)水平的模拟样品,测量结果的相对不确定度约为12%,基本达到岩石样品的测量要求。岩石样品的测量不确定度较大,主要原因是岩石样品中W的含量较高。In order to improve the accuracy of AMS measurement for 182Hf/180Hf, a series of improvement and innovations of measurement technique and method were taken, such as chemical synthesis of ls2 Hf free samples, technique of monitoring off-axis current simultaneously, testing the stability of accelerator system, performing the alternate measurement, modified deduction method of ls2W, testing the measurement method with simulated samples and real rock samples, and testing the reliability of measurement results. The experimental results show that for the simulated samples to the order of 1× 10-10 requirement of measurements for real rock sample the rock sample mainly lies in the high content of the relative uncertainty is about 12% -10 （ 182Hf /180 Hf）, which satisfies the s. The reason of big uncertainty with W in the rock sample.

关 键 词：182Hf岩石样品 加速器质谱 核环境工程 

分 类 号：O571.1[理学—粒子物理与原子核物理]