A nuclide identification method

Abstract

The invention provides a nuclide identification method. The nuclide identification method comprises the steps of constructing a radionuclide library and an energy spectrum thereof by utilizing Monte Carlo simulation; constructing an energy response model of a gamma detector by utilizing the actual measurement energy spectrum; utilizing the energy response model to realize matching of a simulationenergy spectrum and an actual measurement energy spectrum; generating a gamma-ray energy spectrum with a spectral line drift effect by utilizing the matched nuclide gamma-ray energy spectrum; carryingout dimension reduction on the energy spectrum data of the gamma-ray energy spectrum with the spectral line drift effect; constructing a neural network, training the neural network, and realizing optimization of node parameters of the neural network; and identifying the gamma-ray energy spectrum of the unknown nuclide detected by the gamma detector by using the neural network. According to the nuclide identification method, the time consumption of the neural network training process and the calculation overhead of the nuclide identification algorithm are reduced; the nuclide identification speed is improved; and the nuclide identification type and identification precision are improved.

Description

technical field [0001] The invention belongs to the field of nuclear radiation detection, in particular to a nuclide identification method. Background technique [0002] Radionuclides are currently widely used in medical testing, nuclear power and industrial flaw detection and other fields. Its wide application has brought a lot of convenience to human beings, but it has also created the risk of radioactive leakage and spread. In the comprehensive application of nuclear technology, the leakage of radioactive materials, the loss, theft, or loss of control of radioactive sources, or the loss of control of radioisotope and radiation devices have become important factors that endanger public safety. Determining and identifying the types of radionuclides is of great significance for mastering nuclear information, preventing nuclear leakage, combating nuclear smuggling and ensuring nuclear safety. [0003] Generally, the identification of radionuclides is achieved by measuring t...

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Problems solved by technology

[0005] a. There are many types of nuclides. If the energy spectra of different types of nuclides are measured one by one as training data, it will take a long time, and some specific radionuclides are difficult to obtain, thus limiting the number of radionuclides that can be identified. Type; b. The full-spectrum data has a large dimension, which leads to a long training process and high computational complexity

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