SIMS measurement method for oxygen isotope in insulator core material

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...

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Problems solved by technology

However, gas mass spectrometry requires chemical treatment of the sample, the process is complicated, the intermediate links are cumbersome, the final result has a large uncertainty, and the sample cannot be measured in partitions

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