^(129)I的紧凑型AMS测量技术研究

Compact AMS Measurement Technology for ^(129)I

中国原子能科学研究院(CIAE)最新研制成功的紧凑型加速器质谱(AMS)装置,可用于^(14)C、^(129)I、^(239)Pu等多种核素测量。^(129)I是环境示踪常用的核素,^(129)I的测量对于该装置的推广应用至关重要。经过系统实验研究,建立了基于紧凑型AMS的^(129)I测量技术。^(129)I/^(127)I的测量灵敏度和精度分别达到1.5×10^(-14)与0.81%。结果表明:该紧凑型AMS装置对于^(129)I的测量已经达到国际先进水平,这也为^(129)I在核环境监测、海洋污染示踪等领域的应用研究奠定了坚实的基础。

A new compact accelerator mass spectrometer(AMS)facility,used for ^(14)C,^(129)I,^(239)Pu,etc.measurement,has been successfully established by China Institute of Atomic Energy(CIAE)recently.As ^(129)I is a commonly used nuclide for environmental tracing,the performance of 129I measurement is crucial for the applications of the facility.After systematic research,129I measurement technologies of the compact AMS has been established.The measurement sensitivity and the measurement accuracy of ^(129)I/^(127)I reached to 1.5×10^(-14) and 0.81%,respectively.The measurement results show that the compact AMS has reached the international advanced level and can lay the solid foundation for the application of ^(129)I in fields like nuclear environmental monitoring and marine pollution tracing.