1. Department of Physics, Faculty of Sciences, Kyushu University, Fukuoka 810-8560
2. Institut für Physikalische-, Kern-, und Makromolekulare Chemie, Philipps Universität Marburg, D-35032 Marburg, Germany
3. Department of Chemistry and Physics of Condensed Matter, Graduate School of Sciences, Kyushu University, Fukuoka 810-8560
4. SPring-8, Hyogo 679-5198