A new approach to estimate nuclide ratios from measurements with activities close to background |
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Authors: | G. Kirchner,M. Steiner,M. Zä hringer |
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Affiliation: | Bundesamt für Strahlenschutz, 38226 Salzgitter, Germany |
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Abstract: | Measurements of low-level radioactivity often give results of the order of the detection limit. For many applications, interest is not only in estimating activity concentrations of a single radioactive isotope, but focuses on multi-isotope analyses, which often enable inference on the source of the activity detected (e.g. from activity ratios). Obviously, such conclusions become questionable if the measurement merely gives a detection limit for a specific isotope. This is particularly relevant if the presence of an isotope, which shows a low signal only (e.g. due to a short half-life or a small transition probability), is crucial for gaining the information of interest. |
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Keywords: | Decision threshold Detection limit Bayesian statistics Isotope ratios Source identification |
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