Determination method of plutonium age in trace plutonium sample

A determination method and sample technology, applied in the field of radioisotope measurement, can solve the problems of expensive instruments, poor reproducibility of age results, and cumbersome sample processing process, and achieve high method accuracy, short sample analysis time, and high recovery rate. Effect
CN101561404BActive Publication Date: 2011-03-16CHINA INSTITUTE OF ATOMIC ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA INSTITUTE OF ATOMIC ENERGY
Publication Date
2011-03-16

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Abstract

The invention discloses a determination method of plutonium age in a trace plutonium sample. In the method, a sample of plutonium is taken and measured. A scintillator is added to measure Beta counting rate for obtaining the amount of <241>Pu. In another similar sample of plutonium, the isotopic diluent of americium, namely, <243>Am, is added to conduct price adjustment, a TEVA resin column is added, nitrate is used for leaching and collecting the Am component, Alpha spectrum is used for measuring the value of <241>Am / <243>Am . The amount of <241>Am is calculated and substituted into the age-calculating formula to obtain the age of plutonium. The method has simple chemical separation process and high recovery rate. The sample analysis time is short, the instrument operation is simple, andthe method accuracy is high.
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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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