1. Kansai Photon Science Institute, Japan Atomic Energy Agency, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5148
2. Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Sayo-cho, Sayo-gun, Hyogo 679-5198
3. Research Center of Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047
4. Kansai Photon Science Institute, Japan Atomic Energy Agency, Kizu, Kyoto 619-6215