Author Affiliations

C. Bellecci,¹ P. Gaudio,¹ M. Valentini,¹ S. Martellucci,² P. Aversa,³ G. Caputi,³ and F. De Donato R. Zoccali³

¹INFM - Department of Physics, University of Calabria, 87036 Arcavacata di Rende (CS); tel.: ++39 984 401744; fax: ++39 984 401660

²INFM - STFE Department, University of Rome “Tor Vergata”, 00133 Rome; tel.: ++39 6 72597144; fax: ++39 6 72597145

³CRATI s.c.r.l. c/o Department of Physics, University of Calabria, 87036 Arcavacata di Rende (CS); tel.: ++39 984 838053 - 838052; fax: ++39 984 401660