Application of a Monte Carlo method to the uncertainty assessment in in situ gamma-ray spectrometry
Journal article, 2018

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.

Monte Carlo method

In situ gamma ray spectrometry


Radioactive fallout



Leif Persson

Umeå University

Swedish Defence Research Agency (FOI)

Jonas Boson

The Swedish Radiation Safety authority (SSM)

Torbjörn Nylén

Swedish Defence Research Agency (FOI)

Henrik Ramebäck

Chalmers, Chemistry and Chemical Engineering, Energy and Material, Nuclear Chemistry

Swedish Defence Research Agency (FOI)

Journal of Environmental Radioactivity

0265-931X (ISSN)

Vol. 187 1-7

Subject Categories

Accelerator Physics and Instrumentation

Subatomic Physics

Environmental Sciences related to Agriculture and Land-use



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