Anomalously hindered E2 strength B(E2;2_1^+ -> 0^+) in 16C

Authors :: Imai, N.
Aoi, N.
Fukuda, N.
Kishida, T.
Kubo, T.
Minemura, T.
Motobayashi, T.
Takeuchi, S.
Yoneda, K.
Watanabe, H.
Ishihara, M.
Ong, H. J.
Sakurai, H.
Iwasaki, H.
Ohnishi, T. K.
Suzuki, M. K.
Demichi, K.
Kawasaki, H.
Baba, H.
Gomi, T.
Hasegawa, H.
Kaneko, E.
Kanno, S.
Kurita, K.
Takeshita, E.
Saito, A.
Dombradi, Zs.
Elekes, Z.
Fulop, Zs.
Gelberg, A.
Ishikawa, K.
Kondo, Y.
Miura, M.
Nakamura, T.
Sugimoto, T.
Michimasa, S.
Notani, M.
Shimoura, S.
Tamaki, M.
Publication Year :: 2003
Publisher :: arXiv, 2003.
Abstract: The electric quadrupole transition from the first 2+ state to the ground 0+ state in 16C is studied through measurement of the lifetime by a recoil shadow method applied to inelastically scattered radioactive 16C nuclei. The measured lifetime is 75 +- 23 ps, corresponding to a B(E2;2_1+ -> 0^+) value of 0.63 +- 0.19 e2fm4, or 0.26 +- 0.08 Weisskopf units. The transition strength is found to be anomalously small compared to the empirically predicted value.<br />4pages, 4figures, submitted to Physical Review Letters