1. Dipartimento di Fisica
2. Universitá di Roma “La Sapienza” – P. le Aldo Moro 2
3. 00185 Roma
4. Italy
5. Swiss Light Source
6. Research Institute for Interdisciplinary Science (RIIS)
7. Okayama University
8. Okayama 700-8530
9. Japan
10. Department of Applied Physics, Waseda University
11. Tokyo 169-8555
12. Department of Physics, Tokyo Metropolitan University
13. Hachioji 192-0397