Energy spectrum overlapping peak analysis method

An analytical method, a technology of overlapping peaks, applied in the field of analysis of energy spectrum overlapping peaks

Inactive Publication Date: 2015-12-30
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
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Problems solved by technology

This method overcomes the shortcomings of the current spectral overlapping peak analysis method

Method used

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  • Energy spectrum overlapping peak analysis method
  • Energy spectrum overlapping peak analysis method
  • Energy spectrum overlapping peak analysis method

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Embodiment Construction

[0023] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

[0024] In this embodiment, it is assumed that the energy spectrum segment to be decomposed by overlapping peaks obtained in the radioactivity measurement is , use this method to decompose the energy spectrum according to the following specific steps ①~④.

[0025] step ① The energy spectrum segment to be decomposed by overlapping peaks obtained in the radioactivity measurement Perform background subtraction and obtain net peak area of ​​overlapping peaks N total And the net count of each road site after background deduction, used for the net count of each road site Indicates; here ...

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Abstract

The invention discloses an energy spectrum overlapping peak analysis method. The analysis method includes the steps that background rejection is carried out on energy spectrum sections which are obtained from radioactive measurement and to be subjected to overlapping peak resolution, and net peak areas of overlapping peaks and all channel net counts corresponding to the net peak areas of the overlapping peaks are obtained; the energy spectrum sections obtained after background rejection are regarded as a linear sum of multiple Gaussian functions; parameters of the Gaussian functions are combined into a chromosome; population initialization is carried out on the combined chromosome, probability construction fitness functions, from individuals, of the energy spectrum sections are combined, selection, cross and mutation operators of a genetic algorithm are adopted, the weight, average and standard deviation of all the Gaussian functions are obtained after multi-generation operation, and overlapping peak resolution is completed. Calculation is simple, the overlapping peaks overlapping three or more spectrum peaks can be resolved, and the overlapping peak resolving method can be effectively applied to qualitative and quantitative analysis for the spectrum peaks and is good in performance.

Description

technical field [0001] The invention relates to a method for analyzing overlapping peaks of an energy spectrum. Background technique [0002] In the energy spectrum analysis of complex samples, overlapping phenomenon often occurs between spectral peaks with close peak positions, which will affect the accuracy of energy spectrum analysis and the operability of the analytical method. In recent years, more in-depth research has been carried out on the decomposition of overlapping peaks at home and abroad, such as the least square method, principal component regression method, orthogonal projection method, wavelet analysis method, factor analysis method, genetic algorithm, Gaussian curve fitting method and methods such as neural network models. These methods often use filtering and curve fitting to achieve the "best" match between the curve and the spectral line. The problem is that the selection of parameters has a great influence on the results. For example, excessive filteri...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/00
Inventor 黄洪全闫萍方方
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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