R.S.Hayano1,T.Ishikawa1,M.Iwasaki1,H.Outa1,E.Takada1, H.Tamura1,A.Sakaguchi2,M.Aoki3,T.Yamazaki3 Univ. of Tokyo, Tokyo1 Hiroshima Univ., Hiroshima and Higashi-Hiroshima2 Institute for Nuclear Study, Univ. of Tokyo, Tanashi3
Nuovo Cimento A102(1989)437