A method for resolution enhancement of interfering peaks in Ge(Li) gamma-ray spectra

A method is proposed for the analysis of interfering peaks in Ge(Li) gamma-ray spectra making use of resolution enhancement by digital resonators. The successive steps of analysis are: (1) the resolution enhancement of multiplets by a special convolution transformation (5 or 7 channels); (2) non-recursive filtering and (3) the elimination of ripples. The final result of the first and second steps is equivalent of a digital resonator. A computional code is quite simple and can be executed by small computers. For opened multiplets one can obtain practically complete separation by means of this method. The limit of identification for a closed doublet of equal intensities amounts to about 0.6 times the FWHM. Subroutine COMPLEX was written in FORTAN IV and BASIC. The validity of the method is shown by an analysis of some synthetic multiplets and the determination of gold traces in Pt-Rh alloy by means of instrumental and destructive activation analysis.