Study on analysis of isotopic ratio of uranium-bearing particle in swipe samples by FT-TIMS

被引:20
作者
Shen, Yan [1 ]
Zhao, Yonggang [1 ]
Guo, Shi-Lun [1 ]
Cui, Jianyong [2 ]
Liu, Yuang [2 ]
Li, Jinghuai [1 ]
Xu, Jun [3 ]
Zhang, Huizhen [3 ]
机构
[1] China Inst Atom Energy, Dept Radiochem, Beijing 102413, Peoples R China
[2] Beijing Res Inst Uranium Geol, Beijing 100029, Peoples R China
[3] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
关键词
fission track technique; uranium-bearing particle; locating microscopic particle; transferring particle; micromanipulator; TIMS; uranium isotope abundance;
D O I
10.1016/j.radmeas.2008.04.070
中图分类号
TL [原子能技术]; O571 [原子核物理学];
学科分类号
0827 ; 082701 ;
摘要
A fission track (FT) technique has been developed for searching for, locating and transferring a single uranium-bearing particle from swipe samples. The technique consists of (1) searching for uranium-bearing particles in swipe samples by FT technique; (2) locating the particle by FT cluster under optical microscope and (3) transferring the particle from the swipe sample to a filament (Re) of TIMS. The study shows that the efficiency of searching for uranium-bearing particles reaches 90% for particles of size 0.5-20 pm with proper concentration of uranium; the accuracy of locating particles is better than 5 pm; and the transference efficiencies of particles from swipes to Re filaments are similar to 90%, similar to 73% and similar to 43% for particle sizes 0.5-5, 5-10 and 10-20 mu m, respectively. Analysis of U-135 and U-138 isotopic abundances in the particles by TIMS shows that the isotopic abundances are in agreement with those of original reference materials. The study shows that the FT technique combined with TIMS is a feasible, easy-managing and accurate method for determination of uranium isotopes of a single microscopic particle. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:S299 / S302
页数:4
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