1. European Commission, JRC, Directorate for Nuclear Safety & Security, Ispra, Italy
2. Department of Physics and Astronomy, University of Bologna, Bologna, Italy
3. Department of Geoscience, University of Padova, Padova, Italy
4. Department of Industrial Engineering, University of Bologna, Bologna, Italy
5. Environmental Chemistry and Radioactivity Lab, Department of Chemistry “G. Ciamician”, University of Bologna, Bologna, Italy