^53Mn／^55Mn实验室标准样品制备及加速器质谱测量  

Preparation and Accelerator Mass Spectrometry Determination of ^(53)Mn/^(55)Mn Standard Reference Material

作　　者：胡豪[1] 何明[1] 董克君[1] 武绍勇[1] 李振宇[1] 郑国文[1] 李恒[2] 谢林波[3] 林德雨[2] 窦亮[1] 王晓波[2] 刘广山[3] 姜山[1] 

机构地区：[1]中国原子能科学研究院,北京102413 [2]广西大学,物理科学与工程技术学院,广西南宁530004 [3]厦门大学,海洋与地球学院,福建厦门361005

出　　处：《质谱学报》2012年第4期237-240,共4页Journal of Chinese Mass Spectrometry Society

基　　金：国家自然科学基金项目(11075221)资助

摘　　要：宇宙成因核素53 Mn是一种非常理想的地质定年工具。近年来,随着加速器质谱(AMS)技术的不断发展,53 Mn的高灵敏测量成为可能。本工作介绍了53 Mn/55 Mn的系列实验室标准样品的制备以及AMS测量,结果表明:53 Mn/55 Mn的测量值与标称值在误差范围内比较吻合且呈现良好的线性关系,中国原子能科学研究院的AMS系统对53 Mn的测量灵敏度可以达到10-14。The cosmogenic isotope ^53 Mn is a very useful tool for geochronological dating. In recent years, with the development of AMS method, the high sensitivity mearsurment for ^53Mn becomes advisable. High energy is required to remove the interference of ^53Cr in the AMS measurement of ^53Mn, only few AMS laboratories with high terminal voltage satisfy the condition in the world by now. In this paper, the preparation of ^53Mn/^55 Mn laboratory standard^s series and the measurement with AMS method are introduced. In order to reduce the interference of ^53 Cr efficiently, AE-Q3D method was used in AMS measurement of ^53 Mn at China Institute of Atomic Energy （CIAE） based on the HI-13 Tandem Accelerator and the large Q3D magnetic mass spectrometer. The results show that the measured values are in good agreement with their nominal values and the linear relationship between them is excellent. The mearsurment sensitivity of 10 14 for ^53Mn/^55 Mn ratio can be achieved by the AMS system at China Institute of Atomic Energy （CIAE）.

关 键 词：53Mn 标准样品 加速器质谱 

分 类 号：TL817.4[核科学技术—核技术及应用] P597[天文地球—地球化学]