Application of a Monte Carlo method to the uncertainty assessment in in situ gamma-ray spectrometry
Artikel i vetenskaplig tidskrift, 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 universitet

Totalförsvarets forskningsinstitut (FOI)

Jonas Boson

Strålsäkerhetsmyndigheten (SSM)

Torbjörn Nylén

Totalförsvarets forskningsinstitut (FOI)

Henrik Ramebäck

Chalmers, Kemi och kemiteknik, Energi och material, Kärnkemi

Totalförsvarets forskningsinstitut (FOI)

Journal of Environmental Radioactivity

0265-931X (ISSN)

Vol. 187 1-7


Acceleratorfysik och instrumentering

Subatomär fysik

Miljö- och naturvårdsvetenskap