Improved peak shape fitting in alpha spectra

Peak overlap is a recurrent issue ina lpha-particle spectrometry, not only in routine analyses but also in the high-resolution spectra from which reference values for alpha emission probabilities are derived. In this work, improved peak shape formulae are presented for the deconvolution of alpha-particle spectra. They have been implemented as fit functions in a spreadsheet application and optimum fit parameters were searched with built-in optimisation routines. Deconvolution results are shown for a few challenging spectra with high statistical precision. The algorithm outperforms the best available routines for high-resolution spectrometry, which may facilitate a more reliable determination of alpha emission probabilities in the future. It is also applicable to alpha spectra with inferior energy resolution.

POMME Stefaan;  CARO MARROYO Belen; 

2015-01-12

PERGAMON-ELSEVIER SCIENCE LTD

JRC91846

0969-8043,   

http://www.sciencedirect.com/science/article/pii/S0969804314004175,    http://dx.doi.org/10.1016/j.apradiso.2014.11.023,    https://publications.jrc.ec.europa.eu/repository/handle/JRC91846,   

10.1016/j.apradiso.2014.11.023,