Uncertainties in calculated correction factors for true coincidence-summing (TCS).
The aim of this work was to estimate the uncertainties in Monte Carlo calculated correction factors for true coincidence summing (TCS). In this work TCS-factors and their uncertainties were calculated for134Cs and then the corrected activities compared to empirical data. The study was carried out using a close-end coaxial p-type detector (Ø80mm×54.5mm, 80% relative efficiency) and a cylindrical glass fiber sample (Ø60mm×14mm). It was shown that the uncertainty in the calculated correction factor for the primary gamma ray was below 0.5%, which means it will not contribute significantly to the combined uncertainty in an activity measurement for e.g. environmental monitoring.
Swedish Defence Research Agency (FOI), Division of CBRN Defence and Security, SE-164 90 Stockholm, Sweden. Electronic address: johan.kastlander@foi.se.
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J
Kastlander
Swedish Defence Research Agency(FOI), Preparatory Commission for the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO), Flädervägen 51, SE-19464 Upplands Väsby, Sweden. Electronic address: ledg1945@gmail.com.
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LE
De Geer
Swedish Defence Research Agency (FOI), Division of CBRN Defence and Security, SE-901 82 Umeå, Sweden.
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S
Jonsson
Swedish Defence Research Agency (FOI), Division of CBRN Defence and Security, SE-901 82 Umeå, Sweden; Chalmers University of Technology, Department of Chemistry and Chemical Engineering, SE-412 96 Göteborg, Sweden.
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H
Ramebäck