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Radio-Isotope Identification Algorithms for NaI γ Spectra
Los Alamos National Laboratory, Mail Stop F600, Los Alamos, NM 87545, USA
* Author to whom correspondence should be addressed.
Received: 26 November 2008; in revised form: 13 February 2009 / Accepted: 20 February 2009 / Published: 3 March 2009
Abstract: The performance of Radio-Isotope Identification (RIID) algorithms using NaI-based γ spectroscopy is increasingly important. For example, sensors at locations that screen for illicit nuclear material rely on isotope identification using NaI detectors to distinguish innocent nuisance alarms, arising from naturally occurring radioactive material, from alarms arising from threat isotopes. Recent data collections for RIID testing consist of repeat measurements for each of several measurement scenarios to test RIID algorithms. It is anticipated that vendors can modify their algorithms on the basis of performance on chosen measurement scenarios and then test modified algorithms on data for other measurement scenarios. It is therefore timely to review the current status of RIID algorithms on NaI detectors. This review describes γ spectra from NaI detectors, measurement issues and challenges, current RIID algorithms, data preprocessing steps, the role and current quality of synthetic spectra, and opportunities for improvements.
Keywords: Isotope identification algorithm; NaI detector; Synthetic data
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MDPI and ACS Style
Burr, T.; Hamada, M. Radio-Isotope Identification Algorithms for NaI γ Spectra. Algorithms 2009, 2, 339-360.
Burr T, Hamada M. Radio-Isotope Identification Algorithms for NaI γ Spectra. Algorithms. 2009; 2(1):339-360.
Burr, Tom; Hamada, Michael. 2009. "Radio-Isotope Identification Algorithms for NaI γ Spectra." Algorithms 2, no. 1: 339-360.