1. Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, Modena, Italy
2. Laboratory of Palinology and Palaeobotany, Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
3. Department of Materials Science, University of Milan –Bicocca, Milano, Italy
4. CNR-IBFM, Segrate, Italy
5. Laboratory of Ion Beam Physics, ETHZ, Zürich, Switzerland
6. Faculty of Science and Engineering, Åbo Akademi University, Turku, Finland
7. Aarhus AMS Centre, Department of Physics and Astronomy, University of Aarhus, Aarhus C, Denmark
8. Faculty of Arts, Psychology and Theology, Åbo Akademi University, Turku, Finland
9. Studio Silvestri - Ingegneria e architettura, Modena, Italy