1. Department of Physics, Tohoku University, 6-3 Aoba Aramaki Aoba, Sendai, Miyagi 980-8578, Japan
2. Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka, 567-0047, Japan
3. Cyclotron Radio Isotope Center, Tohoku University, 6-3 Aoba Aramaki Aoba, Sendai, Miyagi 980-8578, Japan
4. Center for Molecular Imaging Science, RIKEN, Chuo-ku, Kobe, 650-0047, Japan
5. Institute of Nuclear Research, Pf. 51, 4001 Debrecen, Hungary
6. Department of Physics, York University, YO10 5DD, UK
7. Wright Nuclear Structure Laboratory, Yale University, New Haven, CT 06520-8120, U.S.A.
8. St. Kliment Ohridski University of Sofia, Sofia, 1164, Bulgaria
9. Department of Nuclear Physics, China Institute of Atomic Energy, Beijing, China