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AMS Measurement of 237Np at CIAE

Published online by Cambridge University Press:  09 February 2016

Xianggao Wang ,
Shan Jiang ,
Ming He ,
Kejun Dong ,
Hongtao Chen ,
Guozhu He ,
Wei Wang ,
Shaoyong Wu  and
Yuemei Hu
Xianggao Wang
Affiliation:
College of Physical Science and Technology, Guangxi University, Nanning 530004, China China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Shan Jiang*
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Ming He
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Kejun Dong
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Hongtao Chen
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Guozhu He
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Wei Wang
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Shaoyong Wu
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
Yuemei Hu
Affiliation:
China Institute of Atomic Energy, P.O. Box 275(50), Beijing 102413, China
*
3 Corresponding author. Email: jiangs@ciae.ac.cn.
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Abstract

237Np (≃2.14 × 106 yr half-life) is potentially applicable in studies on nuclear safeguards and radioactive waste migration. The atomic ratio of 237Np/U in nature is 10−12 or even lower, depending strongly on the integral neutron flux received by the material. As an ultra-sensitive technique, accelerator mass spectrometry (AMS) is the best for measuring ultratrace 237Np. By extracting negative molecular ions NpO– from the oxide sample using 238UO– and 208Pb16O2 – pilot beams for the simulation of 237Np ion transport, identifying the interference isotopes by high-resolution dedicated injector, electrostatic analyzer, and time of flight (TOF) detector, a method for AMS measurement of 237Np was set up on the HI-13 accelerator at the China Institute of Atomic Energy (CIAE). A sensitivity of <10–11 has been achieved for the isotopic ratio 237Np/238U.

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Type
Articles
Information
Radiocarbon , Volume 55 , Issue 2: Proceedings of the 21st International Radiocarbon Conference (Part 1 of 2) , 2013 , pp. 294 - 301
Copyright
Copyright © 2013 by the Arizona Board of Regents on behalf of the University of Arizona 

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