1. Department of Physics - University of Calabria; Centre of Excellence for the Study of Innovative Functional Materials; 87036 Arcavacata di Rende Italy
2. Beam Engineering for Advanced Measurements, Co.; 809 South Orlando Ave. Suite I, Winter Park FL 32789 USA
3. Institute of Cybernetics of CNR; Via Campi Flegrei 34 80072 Pozzuoli Italy
4. Unità Tecnica Tecnologie Portici (UTTP); ENEA Research Centre; 80055 Portici Italy