Primary result of 236U measurement with accelerator mass spectrometry at CIAE

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WANG Xiang-Gao, HE Ming, SHI Guo-Zhu, LI Chao-Li, WANG Wei, ZHANG Da-Wei, HUANG Chun-Tang, SHEN Hong-Tao, WU Shao-Lei, HE Guo-Zhu, WU Shao-Yong and JIANG Shan. Primary result of 236U measurement with accelerator mass spectrometry at CIAE[J]. Chinese Physics C, 2010, 34(2): 192-197. doi: 10.1088/1674-1137/34/2/007
WANG Xiang-Gao, HE Ming, SHI Guo-Zhu, LI Chao-Li, WANG Wei, ZHANG Da-Wei, HUANG Chun-Tang, SHEN Hong-Tao, WU Shao-Lei, HE Guo-Zhu, WU Shao-Yong and JIANG Shan. Primary result of 236U measurement with accelerator mass spectrometry at CIAE[J]. Chinese Physics C, 2010, 34(2): 192-197.  doi: 10.1088/1674-1137/34/2/007 shu
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Received: 2009-03-03
Revised: 2009-04-29
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Primary result of 236U measurement with accelerator mass spectrometry at CIAE

    Corresponding author: JIANG Shan,

Abstract: 

The rare isotope 236U has a half-life of 2.342(3)×107 years, and is produced principally by thermal neutron capture on 235U. The isotopic atom ratio of 236U/238U depends on the integral thermal neutron flux received by the material of interest. 236U is potentially useful as a ``fingerprint'' for indicating the presence of neutron-irradiated uranium usually originating from nuclear activity. By extracting negative molecular ion UO from the uranium oxide target, simulating the 236U16O beam transport with 238U16O and 208Pb216O pilot molecular ion beam, transporting the 236U-containing ion beam with a high resolution injection magnet analyzer and electrostatic analyzer system, and finally identifying and detecting 236U with a time-of-flight detector (TOF), a method for AMS (Accelerator Mass Spectrometry) measurement of 236U was established on the HI-13 Accelerator AMS system at China Institute of Atomic Energy.

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