1. RIBF Project Office, Cyclotron Center, RIKEN (The Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198
2. Department of Physics and Astronomy, California State University, Northridge, CA 91330, U.S.A.
3. W. K. Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, U.S.A.
4. The House of Councilors, 2-1-1 Nagata-cho, Chiyoda-ku, Tokyo 100-8962