1. Department of Physics, Kyushu University, Fukuoka 819-0395, Japan
2. Research Center for Superheavy Elements, Kyushu University, Fukuoka 819-0395, Japan
3. RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan
4. Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
5. Université de Strasbourg, CNRS, IPHC UMR 7178, 67037 Strasbourg, France
6. Department of Physics and Astronomy, University of Tennessee, Knoxville, TN 37996, U.S.A.
7. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, U.S.A.
8. Department of Physics, Kyoto University, Kyoto 606-8502, Japan
9. Graduate School of Science and Engineering, Yamagata University, Yamagata 990-8560, Japan
10. Department of Nuclear Physics and Accelerator Applications, Research School of Physics, The Australian National University, Canberra, Australian Capital Territory 2601, Australia
11. Graduate School for Science, Kyushu University, Fukuoka 819-0395, Japan