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Gaussian Function Fitting by Least-Square for Deconvolving the Data of Full Spectrum by the Airborne Gamma-ray Spectrometer |
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Abstract: The radioactive concentrations of 137Cs source and other man-made radionuclides are important data for estimating environment radiation level in nuclear emergence. In order to extract the data of energy peak of 137Cs from full spectra measured by NaI(Tl) airborne gamma-ray spectrometer (GR-820), the overlapped peaks at lower energy bands are deconvolved by Gauss function fitting by least square (single peak and double peaks). The maximum relative error of single peak area is less than ±15% due to only uranium, thorium or cesium sources. And the average relative error of overlapping peak (double peaks) is 21.84%, which are produced by uranium and cesium sources. A research of deconvolving overlapped peaks of more than three peaks is needed.
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Received: 18 August 2009
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