Studies on the gamma radiation environment in Sweden with special reference to 137Cs
Title: Studies on the gamma radiation environment in Sweden with special reference to 137Cs
Author: Almgren, Sara
Reference: Göteborgs universitet, Department of Physics, 2008
Keywords: gamma radiation, caesium, 137Cs, deposition, migration, precipitation in situ, CDE, NWF, Chernobyl, soil sampling, field measurements, dose measurements, dose rate, TLD, natural radiation, kriging
Abstract: Gamma radiation in the environment today mainly originates from naturally occurring radionuclides, but anthropogenic radionuclides, such as 137Cs, contribute in some areas. In order to assess population exposure in case of fallout from nuclear weapons (NWF) or accidents, knowledge and monitoring of external gamma radiation and radionuclide concentrations in the environment is important. For this purpose 34 sampling sites were established in western Sweden and repeated soil sampling, field gamma spectrometry (in situ measurements), and dose rate measurements were performed. The variations in the activities between the different sampling occasions were found to be quite large. The naturally occurring radionuclides were the main source of outdoor dose rates. The uranium and thorium decay series contributed about equally to the total dose while the contribution from 40K was somewhat higher.
URL: https://gupea.ub.gu.se/handle/2077/17691
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