M.Koike1, K.Matsuda2, I.Nonaka1, Y.Saji1, K.Yagi1, H.Ejiri1, Y.Ishizaki1, Y.Nakajima3, E.Tanaka4 Institute for Nuclear Study, Univ. of Tokyo, Tanashi1 Inst.of Physical and Chemical Res. (RIKEN2 Kyushu Univ., Fukuoka3 Tohoku Univ., Sendai4
Journal of the Physical Society of Japan21(1966)2103