Fitting of alpha spectra. Application to low-level measurements

The existence of important interferences between peaks in low-level alpha spectra leads to the search for efficient algorithms for the analysis of experimental data. Fitting the data to the convolution of two left-handed exponentials with a Gaussian gives very good results and performs spectral deconvolutions very accurately using the Levenberg-Marquardt method. In this way, a great part of the chemical treatment for the preparation of the sources can be eliminated because several different nuclides can be simultaneously determinated.