Nuclide rapid identification method based on pattern recognition

Abstract

The present invention relates to a method of applying a pattern recognition method to a digital spectrometer to carry out nuclide rapid identification. The method comprises the steps of using the digital spectrometer to carry out real-time acquisition and data pre-processing on a nuclear radiation pulse signal, and selecting the characteristic energy ray and the area increase ratio of the characteristic energy peak of a correlated nuclide as the needed characteristic information, wherein the characteristic energy ray can be used as the main characteristic to identify the existence of the nuclide, and the area increase ratio of the characteristic energy peak is used as the auxiliary characteristic to be used as the criterion of the parallel analysis of a multi-ray nuclide. The advantages of the present invention are that: the area increase ratio of the characteristic energy peak of the nuclide substitutes the operation in the conventional method of selecting the full-energy peak area of the characteristic ray of the nuclide as the basis of identifying the existence of the nuclide, so that the identification of the nuclide is not interfered by the full-energy peak counting area of the characteristic ray of the nuclide accumulated in the early stage, and the identification reliability of the nuclide is improved; the characteristic extraction process maps an input pattern from the object space to the characteristic space, so that the quantity of information is compressed, the identification and judgement are easy, and the identification speed and efficiency of the nuclide are improved.

Description

technical field [0001] The invention belongs to the technical field of nuclear radiation detection and relates to a method for quickly identifying nuclides by applying a pattern recognition method to a digital spectrometer. Background technique [0002] The objects of nuclear radiation detection are mainly α, β, γ and neutrons. The basis of nuclear radiation detection is the interaction of rays with matter. As long as the medium responds to the incident particles, the effect can be effectively recorded, and the characteristics of the original incident particles can be deduced from the recorded results, the radiation can be detected according to this principle. Take measurements. The commonly used measurement method is to use nuclear radiation detectors, adopt devices and systems composed of various nuclear electronic instruments, obtain and process the electrical signals output by the detectors, and analyze and record the measurement results. At present, there is no all-ro...

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Problems solved by technology

In order to improve the confidence of traditional method identification, methods such as increasing the measurement time of the sample to increase the energy peak area and the energy resolution of the spectrometer are mainly adopted. The main disadvantages are

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