Evaluation method for solving peak area of gamma spectrum

A technology of peak area and gamma spectrum, which is applied in the evaluation field of gamma spectrum peak area solution, can solve the problem that the accuracy cannot be determined

Active Publication Date: 2019-11-29
CHINA INST FOR RADIATION PROTECTION
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Problems solved by technology

However, there is currently no standardized method for evaluating the solution method of the gamma spectrum all-energy peak area. There are certain deviations in the results calculated by various methods. There is no complete set of evaluation methods to evaluate whether a specific calculation method is accurate. , resulting in uncertain accuracy

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  • Evaluation method for solving peak area of gamma spectrum
  • Evaluation method for solving peak area of gamma spectrum
  • Evaluation method for solving peak area of gamma spectrum

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0025] An evaluation method for gamma spectrum peak area solutions such as figure 1 , the broader peak is the gamma spectrum using the activity of the NaI detector, and the other is the NaI deposition spectrum with theoretically infinite resolution. The difference between the two is whether Gaussian widening is performed.

[0026] Based on this principle, Monte Carlo simulation can be used to simulate the theoretically infinitely good sodium iodide energy spectrum, so that the peak area count rate of the all-energy peak can be directly obtained. And the theoretically infinitely good energy spectrum can be broadened by Monte Carlo online or offline to obtain the energy spectrum in line with the actual situation;

[0027] In the process of calculating the peak area of ​​the actual spectrum analysis, different analysis methods are mainly used to...

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Abstract

The invention relates to an evaluation method for solving the peak area of a gamma spectrum. The evaluation method comprises the following steps: the theoretically infinitely good energy spectrum of sodium iodide in seawater is simulated through the Monte Carlo method, so that the peak area counting rate of full-energy peaks is obtained; the theoretically infinitely good energy spectrum is subjected to Monte Carlo on-line broadening or off-line broadening, so that an energy spectrum meeting an actual condition can be obtained; and the peak area of the on-line broadened or off-line broadened energy spectrum is solved through Gaussian function fitting, Gaussian and linear substrate combined fitting, direct summation and energy spectrum peak area deduction solving methods. According to the evaluation method, different analysis methods are adopted to solve the total energy peak area of the actual energy spectrum. Results solved by the different methods and the uncertainty of the differentmethods can be compared with theoretically infinitely good energy spectrum, and therefore, the evaluation of the various peak analysis methods is completed; and the energy spectrum simulated based onthe Monte Carlo is used as a standard value, so that the different peak area solving methods can be well evaluated.

Description

technical field [0001] The invention relates to the fields of gamma spectrometer, gamma energy spectrum analysis, on-site measurement and radioactivity monitoring in water, in particular to an evaluation method for solving gamma spectrum peak area. Background technique [0002] There are many peak area calculation methods in the traditional gamma spectrometer energy spectrum analysis. If the advantages, disadvantages or accuracy of these methods are evaluated in advance, it will help to choose a reasonable method for practical application. [0003] Usually, in gamma spectrum analysis, the problem of choosing a method for calculating peak area is often encountered. Which method to choose to ensure accurate results is a problem encountered by every gamma spectrum analyst. However, there is currently no standardized method for evaluating the solution method of the gamma spectrum all-energy peak area. There are certain deviations in the results calculated by various methods. The...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/36
CPCG01T1/36
Inventor 李强陈立唐智辉方登富商洁崔伟王勇杨波王明亮韦应靖黄亚雯张庆利
Owner CHINA INST FOR RADIATION PROTECTION
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