1. ISMN - CNR; P.O. Box 10; 00015; Montelibretti, Roma; Italy
2. Sincrotrone Trieste; Area Science Park; 34012; Trieste; Italy
3. Dept. of Mechanical Engineering; University of Rome “Tor Vergata”; 00133; Roma; Italy
4. IENI - CNR; 20125; Milano; Italy