1. RIKEN (The Institute of Physical and Chemical Research), Wako, Saitama 351-0198
2. Department of Physics, Saitama University, Saitama 338-8570
3. Center for Instrumental Analysis, Niigata University, Niigata 950-2181
4. Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198
5. Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195
6. Department of Chemistry, Niigata University, Niigata 950-2181
7. University of Tsukuba, Tsukuba, Ibaraki 305-8571
8. Department of Physics, Tohoku University, Sendai 980-8578
9. Department of Physics, Yamagata University, Yamagata 990-8560