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

N. Imai; N. Aoi; N. Fukuda; T. Kishida; T. Kubo; T. Minemura; T. Motobayashi; S. Takeuchi; K. Yoneda; H. Watanabe; M. Ishihara; H. J. Ong; H. Sakurai; H. Iwasaki; T. K. Ohnishi; M. K. Suzuki; K. Demichi; H. Kawasaki; H. Baba; T. Gomi; H. Hasegawa; E. Kaneko; S. Kanno; K. Kurita; E. Takeshita; A. Saito; Zs. Dombradi; Z. Elekes; Zs. Fulop; A. Gelberg; K. Ishikawa; Y. Kondo; M. Miura; T. Nakamura; T. Sugimoto; S. Michimasa; M. Notani; S. Shimoura; M. Tamaki

doi:10.1103/physrevlett.92.062501

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

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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.

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N. Imai, N. Aoi, N. Fukuda, T. Kishida, T. Kubo, T. Minemura, T. Motobayashi, S. Takeuchi, K. Yoneda, H. Watanabe, M. Ishihara, H. J. Ong, H. Sakurai, H. Iwasaki, T. K. Ohnishi, M. K. Suzuki, K. Demichi, H. Kawasaki, H. Baba, T. Gomi, H. Hasegawa, E. Kaneko, S. Kanno, K. Kurita, E. Takeshita, A. Saito, Zs. Dombradi, Z. Elekes, Zs. Fulop, A. Gelberg, K. Ishikawa, Y. Kondo, M. Miura, T. Nakamura, T. Sugimoto, S. Michimasa, M. Notani, S. Shimoura, M. Tamaki. 2003-09-30. Anomalously hindered E2 strength B(E2;2_1^+ -> 0^+) in 16C. https://doi.org/10.1103/physrevlett.92.062501

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