ALFITeX: a new code for the deconvolution of complex alpha-particle spectra |
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Authors: | B. Caro Marroyo A. Martín Sánchez M. Jurado Vargas |
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Affiliation: | 1. Department of Physics, University of Extremadura, 06006, Badajoz, Spain
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Abstract: | A new code for the deconvolution of complex alpha-particle spectra has been developed. The ALFITeX code is written in Visual Basic for Microsoft Office Excel 2010 spreadsheets, incorporating several features aimed at making it a fast, robust and useful tool with a user-friendly interface. The deconvolution procedure is based on the Levenberg–Marquardt algorithm, with the curve fitting the experimental data being the mathematical function formed by the convolution of a Gaussian with two left-handed exponentials in the low-energy-tail region. The code also includes the capability of fitting a possible constant background contribution. The application of the singular value decomposition method for matrix inversion permits the fit of any kind of alpha-particle spectra, even those presenting singularities or an ill-conditioned curvature matrix. ALFITeX has been checked with its application to the deconvolution and the calculation of the alpha-particle emission probabilities of 239Pu, 241Am and 235U. |
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