The natural radioactivity of Istria, Croatia

Because of the geological structure of the Istrian peninsula which mainly consists of limestone that is characterized by karstic topography on its surface, it is expected that there are areas with elevated radon levels in soil gas as well as inside buildings (e.g. houses, kindergartens, schools). Recently, from autumn 2013 until spring 2015, more than 1200 radon measurements at about 500 randomly selected locations (in houses as well as in...