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Improved peak shape fitting in alpha spectra.

S Pommé1, B Caro Marroyo2

  • 1European Commission, Joint Research Centre, Institute for Reference Materials and Measurements, Retieseweg 111, B-2440 Geel, Belgium.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|December 16, 2014
PubMed
Summary
This summary is machine-generated.

Improved peak shape formulas enhance alpha-particle spectrometry by accurately deconvoluting spectra. This advancement aids in the precise determination of alpha emission probabilities, even with challenging or lower-resolution data.

Keywords:
Alpha-emission probabilitiesAlpha-particle spectrometryDeconvolutionLeast-squares fittingMaximum likelihoodSpectral interference

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Area of Science:

  • Nuclear Physics
  • Spectrometry
  • Analytical Chemistry

Background:

  • Peak overlap is a common challenge in alpha-particle spectrometry.
  • This issue affects both routine analyses and high-resolution spectra used for reference values.

Purpose of the Study:

  • To present improved peak shape formulas for alpha-particle spectrum deconvolution.
  • To implement these formulas in a spreadsheet application for practical use.

Main Methods:

  • Developed and implemented novel peak shape formulas as fit functions.
  • Utilized built-in optimization routines within a spreadsheet application.
  • Tested the algorithm on challenging, high-precision alpha spectra.

Main Results:

  • The developed algorithm demonstrates superior performance compared to existing routines for high-resolution spectrometry.
  • Effective deconvolution was achieved for spectra with high statistical precision.
  • The method is also applicable to spectra with lower energy resolution.

Conclusions:

  • The improved peak shape formulas offer a more reliable method for alpha emission probability determination.
  • This advancement benefits both high-resolution and lower-resolution alpha spectrometry.
  • Facilitates more accurate reference value derivation in nuclear science.