Determination method of plutonium age in trace plutonium sample

A measurement method and sample technology, applied in measuring devices, material analysis through electromagnetic means, instruments, etc., can solve the problems of cumbersome sample processing process and poor repeatability of weapon-grade plutonium age results, and achieve short sample analysis time , good background control and high method accuracy
CN101561418AActive Publication Date: 2009-10-21CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Publication Date
2009-10-21

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Abstract

The invention discloses a determination method of plutonium age in a trace plutonium sample. The method comprises the following steps of: adding plutonium and the isotopic diluents of daughter americium thereof, namely, Pu and Am, in the sample; adding sodium nitrite for price adjustment; and then loading a TEVA resin column, using a chemical separation method to respectively obtain a Pu component and an Am component, and using a multi-receiving inductive coupling plasma mass spectrometry to measure the Pu component and the Am component respectively to obtain the values of Pu / Pu and Am / Am . According to the amount of the added diluents, the value of Pu / Am is calculated and substituted in the age-calculating formula to obtain the age of plutonium. The deviation between the age measured by the method and the reference value is within 5%.
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Description

technical field

[0001] The invention belongs to the technical field of radioisotope measurement, in particular to the detection technology of trace plutonium age. Background technique

[0002] In the field of nuclear forensics and verification, there is a need to detect the age properties of trace plutonium. Scholars at home and abroad mainly use gamma spectrometer to determine the age of plutonium. The measurement object of this method is plutonium material, and it is generally believed that the sample size needs to be at least 100mg, and there are certain requirements for the shape of the sample. For smaller samples, due to the limitation of the detection limit of the instrument, the deviation of the plutonium age measured by the gamma spectrometer is relatively large, and the required measurement time is also relatively long. In Radiochim.Acta 96, (2008) 327-331, Zhang Haitao et al. developed a method for measuring the age of plutonium material by α spectrum combined wi...

Claims

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