1. Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195
2. Los Alamos National Laboratory, K764, Los Alamos, New Mexico 87545, U.S.A.
3. Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550, U.S.A.
4. Department of Physics, Tokyo Institute of Technology, Meguro-ku, Tokyo 152-8551
5. Department of Physics, University of California, Riverside, California 92521, U.S.A.
6. TRIUMF, 4004 Wesbrook Mall, Vancouver, B.C., Canada V6T 2A3