K.Asahi1,M.Ishihara1,N.Inabe1,T.Ichihara1,T.Kubo1, M.Adachi2,H.Takanashi2,M.Kouguchi2,M.Fukuda2,D.Mikolas3, D.J.Morrissey3,D.Beaumel4,T.Shimoda5,H.Miyatake5, N.Takahashi5 Inst.of Physical and Chemical Res. (RIKEN1 Tokyo Inst.of Technology, Tokyo2 University of Michigan, Ann Arbor, MI3 error4 Osaka Univ., Osaka5
Physics Letters,Section B251(1990)488