A Nonlinear Wavelet Method for Data Smoothing of Low-level Gamma-ray Spectra
Xiao GANG, Li Deng, Zhang Benai, Zhu Jian-shi · Journal of Nuclear Science and Technology · 2004
A nonlinear wavelet method was designed for smoothing low-level gamma-ray spectra. The spectra of a 60Co graduated radioactive source and a mixed soil sample were smoothed respectively according to this method and a 5 point smoothing method. The FWHM of 1,332 keV peak of 60Co source and the absolute activities of 238U of soil sample were calculated. The results show that the nonlinear wavelet method is better than the traditional method, with less loss of spectral peak and a more complete reduction of statistical fluctuation.