期刊
APPLIED RADIATION AND ISOTOPES
卷 96, 期 -, 页码 148-153出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.apradiso.2014.11.023
关键词
Alpha-particle spectrometry; Spectral interference; Deconvolution; Least-squares fitting; Alpha-emission probabilities; Maximum likelihood
类别
资金
- European Metrology Research Programme (EMRP) within the EURAMET-EMRP Joint Research Project [IND04-ESRMG2, IND04-MetroMetal]
- EMRP within EURAMET
- European Union
Peak overlap is a recurrent issue in alpha-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. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.orgilicenses/by/3.0/).
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