A low-resolution γ-spectrum inversion analysis system and method based on Monte Carlo response matrix

Abstract

The invention relates to a low-resolution gamma energy spectrum inversion analysis process and method based on Monte Carlo response matrix. The analysis process includes instrument spectrum detection, establishment of detector geometric model, simulation of detector response function, response function characteristic parameter extraction, Card response matrix generation, inversion analysis, according to the physical process of instrument spectrum formation, the geometric model of the detector is established, and the response function of the NaI(Tl) scintillation detector to the gamma photon is simulated by the Monte Carlo method, the characteristic parameters of the response function are determined, and The Monte Carlo response matrix is ​​constructed between the radioactive source and the γ spectrum through the interpolation algorithm, and combined with the Gold or Boosted-Gold algorithm, the inversion and analysis of the γ instrument spectrum of other measured samples is realized under the response matrix. Applying the analytical method of the present invention eliminates complex processing procedures such as spectrum smoothing, peak finding, and multiple peak decomposition, and the analytical result is that the spectral line to be measured is close to the solution of the theoretical physical spectral line under the response matrix. The ability has improved.

Description

technical field [0001] The invention relates to the technical field of gamma instrument spectrum analysis, in particular to a low-resolution gamma energy spectrum inversion analysis system and method based on a Monte Carlo response matrix. Background technique [0002] Driven by the application requirements of the International Atomic Energy Agency (IAEA), the radioactivity spectrometer has become an indispensable equipment for various nuclear radiation sites such as nuclear facilities, nuclear power plants, chemical defense forces, nuclear emergency and verification, and anti-nuclear terrorism. For large public places such as airports, ports, customs, and stations, it is used in nuclear technology applications such as environmental radiation detection, anti-nuclear terror security inspection, radiation source cleaning, and natural radionuclide information detection. Therefore, the study of γ-ray spectral analysis methods has broad application scenarios and social practical ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a low-resolution gamma energy spectrum inversion analysis system and method based on the Monte Carlo response matrix. It does not consider the matching of the detector and the spectrometer, the extraction of multiple characteristic parameters in the energy spectrum, and the construction of the response matrix between the radioactive source and the gamma energy spectrum, etc., to achieve accurate qualitative and quantitative radionuclide analysis goal

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