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Xiong C.,Chengdu University of Technology | Xiong C.,Jiangxi Nuclear Industry Geological Bureau Testing Center | Ge L.-Q.,Chengdu University of Technology | Liu D.,The Radiation Environment Monitoring Station of Mianyang | And 4 more authors.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2016

Aiming at the self-excitation effect on the interference of measurements which exist in the process of Energy dispersive X-ray fluorescence method for uranium measurement. To solve the problem of radioactive isotopes only used as excitation source in determination of uranium. Utilizing the micro X-ray tube to test Self-excitation effect to get a comparison of the results obtained by three different uranium ore samples-109Cd, 241Am and Mirco X-ray tube. The results showed that self-excitation effect produced the area measure of characteristic X-ray peak is less than 1% of active condition, also the interference of measurements can be negligible. Photoelectric effect cross-section excited by 109Cd is higher, corresponding fluorescence yield is higher than excited by 241Am as well due to characteristics X-ray energy of 109Cd, 22.11 & 24.95 KeV adjacent to absorption edge energy of Lα, 21.75 KeV, based on the above, excitation efficiency by 109Cd is higher than 241Am; The fact that measurement error excited by 241Am is significantly greater than by 109Cd is mainly due to peak region overlap between L energy peaks of uranium and Scattering peak of 241Am, 26.35 keV, These factors above caused the background of measured Spectrum higher; The error between the uranium content in ore samples which the X-ray tube as the excitation source and the chemical analysis results is within 10%. Conclusion: This paper come to the conclusion that the technical quality of uranium measurement used X-ray tube as excitation source is superior to that in radioactive source excitation mode. © 2016, Peking University Press. All right reserved.


Du X.-S.,Jiangxi Nuclear Industry Geological Bureau Testing Center | Xiong C.,Jiangxi Nuclear Industry Geological Bureau Testing Center | Dou X.-P.,Jiangxi Nuclear Industry Geological Bureau Testing Center | Wang H.-H.,Jiangxi Nuclear Industry Geological Bureau Testing Center
Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology | Year: 2014

The in-situ core analysis is made by field EDXRF analysis during the process of anomaly inspection in Duobaoshan polymetallic area. There is a high level of consistency between core in-situ analysis and core powder sample analysis. The regional high-anomaly for some elements, such as copper, zinc and manganese, can be obtained by analyzing 37 samples from 20 drill holes. Some error, which is led by uneven mineralization, can be corrected via multi and Split-core measurement. The relative error is less than 20% between in-situ EDXRF and WDXRF in laboratory. ©, 2014, Hedianzixue Yu Tance Jishu/Nuclear Electronics and Detection Technology. All right reserved.


Du X.-S.,Jiangxi Nuclear Industry Geological Bureau Testing Center | Zhang L.-X.,Jiangxi Nuclear Industry Geological Bureau Testing Center | Liang B.,Jiangxi Nuclear Industry Geological Bureau Testing Center | Xie D.-X.,Jiangxi Nuclear Industry Geological Bureau Testing Center | And 2 more authors.
He-Huaxue yu Fangshe Huaxue/Journal of Nuclear and Radiochemistry | Year: 2012

This paper investigates the adsorption of uranium on the polyaluminium and the determination of uranium in the solution containing aluminum ion using Arsenazo III. Research shows that: the error of uranium determination using Arsenazo III is less than 10% when the concentration of aluminum is less than 0.1 mol/L in the 1:1 hydrochloric acid medium, molar absorption coefficient is 103 L/(mol·cm). When OH- is two times aluminum in the polyaluminum and the concentration of aluminum is 5.64×10-3 mol/L, the removal rate of uranium can reach 90% or more. Therefore, polyaluminum is a kind of very good uranium adsorption materials, and it can realize the volume reduction of the waste water containing uranium, thus reducing the costs of nuclear waste disposal.

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