1. Department of Production Science and Technology,
Gunma University, 29-1, Hon-cho, Ota, Gunma 373-0057,
Japan
2. Japan Synchrotron Radiation Research Institute
(JASRI), SPring-8, 1-1-1 Kouto, Mikazuki, Sayo, Hyogo 679-5198,
Japan
3. Faculty of Science, University of
Hyogo, 3-2-1 Kouto, Kamigori-cho, Ako-gun, Hyogo 678-1297,
Japan