An application method of energy spectrum knowledge base suitable for elemental analysis

Abstract

The invention discloses an application method of an energy spectrum knowledge base suitable for elemental analysis, which adopts the method of directly and effectively comparing with many spectrum shapes in the spectrum shape knowledge base to obtain the components in the measured material corresponding to the new measurement spectrum shape The composition and content of elements and other information. Find out the spectral shapes of the known element types and contents with reference effect through normalization processing, peak-finding processing, peak position consistency or similarity, and sort them according to the similarity, and select the three spectra with the most reference effect Compare and analyze the new measurement spectrum to obtain information such as the composition and content of each component element in the measured material corresponding to the new measurement spectrum. This method effectively avoids the disadvantages of performing linear regression or nonlinear regression on all existing spectral shape data and corresponding element contents in the original calibration method, and directly adds the spectral shape of the spectral shape knowledge base each time. It is easy to operate with the test and supplement.

Description

technical field [0001] The invention relates to a data processing technical method for elemental analysis, in particular to a data processing technical method for neutron activation elemental analysis. Background technique [0002] Building materials, coal, thermal power, metallurgy, mining and other industries need to analyze the element composition and content of bulk materials on the conveyor belt to guide production. As a main online elemental analysis instrument, the multi-element analyzer using neutron activation prompt gamma analysis technology can realize continuous analysis of bulk materials on the conveyor belt. [0003] At present, the analysis principle of this type of instrument is that neutrons are irradiated on the material and react with the nuclei of each element in the material. Different elements emit characteristic γ-rays with different energies and intensities. By detecting the energy of characteristic γ-rays, the types of elements are identified. The e...

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Problems solved by technology

[0005] However, the disadvantages of this method are: unknown elements cannot be analyzed, and elements without a mathematical model cannot be analyzed; at the same time, materials whose element content is outside the coverage of the calibration sample cannot be analyzed; and each time the calibration sample is added, Regression processing is required

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