Gaussian fitting in gamma-ray spectral decomposition

LOW ENERGY ACCELERATORS AND RADIATION APPLICATIONS

Gaussian fitting in gamma-ray spectral decomposition

FU Chen，

WANG Nanping

Nuclear Science and Techniques

Vol.21, No.4

pp.214-217

Published in print 20 Aug 2010

DOI：10.13538/j.1001-8042/nst.21.214-217

38503

In order to extract the information of 662-keV ¹³⁷Cs spectra from the overlapping peaks with 583-keV ²⁰⁸Tl, 609-keV ²¹⁴Bi, the overlapping peaks are measured by in-situ γ-ray spectrometer using a NaI(Tl) detector. The spectral model is optimized by the Gaussian fitting algorithm, and the optimized fitting indexes for fitting/original value are from 0.96 to 0.99. Gaussian fitting verified by experiment is feasible for γ-ray spectrum analysis. The full energy peak of ¹³⁷Cs is extracted correctly from the overlapping peaks, it is important for in-situ γ-ray spectrometer to estimate contamination of ¹³⁷Cs in radiated environment and nuclear accident.

Gamma-ray spectrumGaussian fittingOverlapping peaksDecomposition and fitting

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