Mapping of radon in Danish soils 1. Collection of basis data

Danish soils are characterised as regards content of uranium, thorium, radium and radon. This has been done to supplement earlier collected data, to give an overview of the radon emanation from Danish soils, which is reasonably adequate for area and for the common soils. To supply the analysis of soil samples from the field, an airborne measurements of the radioactive radiation on Bornholm, has been carried out which can combine the point measurements, represented by the samples. The aim of the activities has been to prepare the geological basis to describe a radon potential map, where other radon data will to be included. 158 samples have been analysed. (EHS)