Analysis of gamma-ray spectra with spectral unmixing — Part I: Determination of the characteristic limits (decision threshold and statistical uncertainty) for measurements of environmental aerosol filters
Résumé
Poisson-statistics based spectral unmixing has previously been shown to be an
efficient analysis tool for the activity estimation of radionuclides from gammaray spectroscopy measurements. In this paper, we present the quantification
of characteristic limits (decision threshold, detection limit and limits of the
coverage interval) for the metrological use of such spectral unmixing algorithms.
The proposed approaches are evaluated and validated with simulated spectra of
HPGe and NaI measurements by comparing the results to characteristic values
calculated from Monte Carlo simulations
Mots clés
Decision threshold
Full spectrum analysis
Gamma spectrometry
Spectral unmixing
Uncertainty
ionizing radiation
radioactivity
signal processing
spectrum analysis
gamma-rays
spectrometry
spectral unmixing
decision threshold
metrology
radionuclide
Monte-Carlo
simulation
particle transport
gamma-ray spectrometry characteristic limits full spectrum analysis spectral unmixing
gamma-ray spectrometry
characteristic limits
full spectrum analysis
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