SIMS measurement method for oxygen isotope in insulator core material

A technology of oxygen isotopes and measurement methods, which is applied in measurement devices, analysis materials, material analysis by electromagnetic means, etc., can solve the problems of cumbersome intermediate links, complicated processes, and inability to measure samples in different regions.

Active Publication Date: 2014-08-20
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

However, gas mass spectrometry requires chemical treatment of the sample, the process is complicated, the interm...

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  • SIMS measurement method for oxygen isotope in insulator core material
  • SIMS measurement method for oxygen isotope in insulator core material
  • SIMS measurement method for oxygen isotope in insulator core material

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Embodiment Construction

[0059] The above and other technical features and advantages of the present invention will be described in more detail below in conjunction with the accompanying drawings.

[0060] In order to achieve the above object, the instruments and samples required by the present invention include: SIMS mass spectrometer, scanning electron microscope (SEM), energy dispersive spectrometer, micromanipulator, powder sample, Si / Ta standard sample, graphite carbon sheet, conductive glue, Copper mesh, scissors and tweezers, etc.

[0061] The SIMS mass spectrometer is used for mass spectrometry. The sample is bombarded by the primary ion beam, and the secondary ion O is sputtered out. - , use the receiver for peak shaving reception and data acquisition, get 18 O / 16 O ratio, so as to analyze the oxygen isotope ratio in uranium oxide; scanning electron microscope (SEM) and energy dispersive spectrometer are used to find and identify uranium particles; micromanipulator is used to select and tr...

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Abstract

The present invention relates to a SIMS measurement method for oxygen isotope in an insulator core material. The process comprises: transferring uranium oxide micro-particles onto a graphite carbon sheet to prepare a sample; debugging equipment required during the measurement process; measuring oxygen isotope of the uranium oxide micro-particles, and calculating the <18>O/<16>O ratio; correcting the measurement value, and calculating the uncertainty; and replacing the standard sample and uninstalling the program. According to the present invention, the chemical treatment of the sample is not required, and the measurement can be directly performed, such that the analysis speed is rapid, the sample preparation is simple, and the sample consumption is low; SIMS has the micro-zone analysis and depth profiling capability, and can perform oxygen isotope measurement on different regions and places having different depths of the sample; and SIMS performs measurements by receiving O<-> without conversion of CO2 gas so as to reduce the intermediate link, reduce the introduction factor of the final result uncertainty, and meet characteristics of rapid and accurate analysis of the nuclear forensics.

Description

technical field [0001] The invention belongs to the field of oxygen isotope measurement, in particular to a SIMS measurement method for oxygen isotope in insulator core materials. Background technique [0002] With the development of international nuclear non-proliferation, anti-nuclear terrorism and nuclear safeguards, nuclear security has become a focus of attention of the international community. In 2010 and 2012, nuclear security summits were held, which mainly discussed nuclear security issues such as international nuclear non-proliferation and anti-nuclear terrorism. As a method of diagnostic analysis of nuclear material information characteristics—nuclear forensics has been paid more and more attention by governments and social groups in various countries. In the early 1990s, cases of illegal trade in nuclear materials were reported. It is mainly due to the confusion in the management of nuclear materials after the disintegration of the former Soviet Union, which le...

Claims

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Application Information

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IPC IPC(8): G01N27/62
Inventor 王同兴张燕张生栋赵永刚沈彦姜小燕鹿捷
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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