Gaussian fitting in gamma-ray spectral decomposition

In order to extract the information of 662 keV Cs-137 spectra from the overlapping peaks with 583 keV Tl-208 609-keV (214)B1, the overlapping peaks are measured by in situ gamma-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 gamma-ray spectrum analysts The full energy peak of Cs-137 is extracted correctly from the overlapping peaks it is important for in-situ gamma-ray spectrometer to estimate contamination of Cs-137 in radiated environment and nuclear accident