1. Physics Department and CENMAT, University of Trieste, Via Valerio 2, I-34127 Trieste,
Italy
2. IOM-CNR, Laboratorio TASC, S.S. 14 Km 163.5, I-34149 Trieste, Italy
3. Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Campus de Cantoblanco,
28049 Madrid, Spain
4. Department
of Earth Sciences,
Department of Physics and Astronomy, TYC@UCL, and London Centre for
Nanotechnology, University College London, Gower Street, London WC1E 6BT, United Kingdom
5. Sincrotrone Trieste S.C.p.A., S.S. 14 Km 163.5, 34149 Trieste, Italy
6. IOM-CNR, DEMOCRITOS National Simulation Centre, I-34100 Trieste, Italy