1. GSI Helmholtzzentrum für Schwerionenforschung GmbH, Plankstrasse 1., D-64291 Darmstadt, Germany
2. Institute für Kernphysik, Johannes Gutenberg Universität Mainz, Johann-Joachim-Becher-Weg 45, D-55099 Mainz, Germany
3. RCNP, Osaka University, 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan
4. Osaka Electro-Communication University, 18-8 Hatsumachi, Neyagawa, Osaka 572-8530, Japan
5. KVI, Zernikelann 25, NL-9747 AA Groningen, The Netherlands
6. Graduate School of Science, Tohoku University, 6-3 Aramaki Aza-Aoba, Aoba-ku, Sendai 980-8578, Japan
7. Department of Physics, Kyoto University, Sirakawa Oiwake, Sakyou-ku, Kyoto 606-8502, Japan
8. Department of Physics, Tokyo University, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8654, Japan
9. IPHC, Université Louis Pasteur, 23 rue du Loess, F-67037 Strasbourg cedex 2, France
10. Department of Physics, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
11. KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan