Σφακιανάκης Αλέξανδρος
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Κυριακή 18 Φεβρουαρίου 2018

Application of a Monte Carlo method to the uncertainty assessment in in situ gamma-ray spectrometry

Publication date: July 2018
Source:Journal of Environmental Radioactivity, Volume 187
Author(s): Leif Persson, Jonas Boson, Torbjörn Nylén, Henrik Ramebäck
In situ gamma-ray spectrometry has since the introduction of portable germanium detectors been a widely used method for the assessment of radionuclide ground deposition activity levels. It is, however, a method that is most often associated with fairly large and, more important, poorly known combined measurement uncertainties. In this work an uncertainty analysis of in situ gamma ray spectrometry in accordance with the Guide to the Expression of Uncertainty in Measurements is presented. The uncertainty analysis takes into account uncertainty contributions from the calibration of the detector system, the assumed activity distribution in soil, soil density, detector height and air density. As a result, measurement results from in situ gamma spectrometry will serve as a better basis for decision-making in e.g. radiological emergencies.



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