Gamma ray spectrometry radionuclide identification method utilizing multiple detectors

Abstract

The invention relates to a gamma ray spectrometry radionuclide identification method utilizing multiple detectors. The gamma ray spectrometry radionuclide identification method comprises the following steps: step 1) respectively seeking peaks of spectra acquired by multiple detectors from substances at the same time; step 2) utilizing the peaks sought in the step 1) to constitute merged peaks, wherein each merged peak is merged by a plurality of the peaks with energy difference in a preset range; and step 3) performing radionuclide identification by utilizing the merged peaks in the step 2). According to the method disclosed by the invention, high sensitivity and omnidirectional detection which are achieved by the multiple detectors can be utilized, and the problem that resolution is reduced due to addition of the multiple spectra can be also avoided. The method is not limited by the number of the detectors and can be used even part of the detectors is damaged.

Description

Technical field [0001] The invention relates to a gamma energy spectrum nuclide identification method, in particular to a gamma energy spectrum nuclide identification method using multiple detectors. Background technique [0002] The method of nuclide identification through peak finding is widely used in radioactive material monitoring systems. This type of method first finds the position of the peak in the energy spectrum by peak searching and estimates the peak area and other information, and then finds the nuclides with the energy matching these peak positions in the edited nuclide library, and establishes a linear variance group Or other methods estimate the contribution of each nuclide to the area of ​​each peak to determine whether it contains a certain nuclide. The detection efficiency and resolution of the detector are the main factors affecting this type of method. In order to improve detection efficiency, multiple detectors are often used to detect the monitored objec...

AI Technical Summary

Problems solved by technology

Although the use of multiple detectors can improve the overall detection efficiency, it also leads to a new problem, that is, how to process multiple gamma spectra obtained by multiple detectors at the same time

A common method is to add these energy spectra after energy alignment. The problem with this method is that it is difficult to align these energy spectra

Due to the differences in the linearity and stability of each detector, the resolution of the energy spectrum after the addition is significantly deteriorated, thus affecting the results of peak finding and identification

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