A Study of the Peak Boundary Method and Effect Evaluation Based on NaI(TI) Detector for γ-Spectrum Analysis

Abstract:

In order to accurately analyze the result, which comes from quantitative and qualitative detection based on gamma energy spectrum of NaI(T1) detector, peak boundary has become one of the main factors which influence the spectrum analysis. By implementing some common boundary determining algorithms in the Matlab such as simple comparison method, derivative method, symmetry zero-area method, the full width method and gaussian function fitting method, as well as comparing effectiveness among those algorithm, priority of those boundary algorithms is evaluated. At the same time, because the boundary determining algorithm based on traditional gaussian fitting is not ideal, the new boundary determining algorithm based on the least squares fitting of gaussian function with weighting factor is proposed. The practice verifies that this method is stability and can obtain preferable convergence result in boundary determining of unimodal or combination peaks.

• Periodical: Applied Mechanics and Materials (Volumes 347-350)
• Pages: 1006-1011
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.347-350.1006
• Online since: August 2013
• Authors: Yao Zong Yang, Fang Fang, Jian Feng He, Jun Jun Ran
• Keywords: Boundary Determine, Gaussian Fitting, Weighted Least Squre Fitting, γ-Spectrum

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