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Anomalously hindered E2 strength B(E2;2+(1)-->0+) in 16C
1RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan. imai@rarfaxp.riken.go.jp
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 mean lifetime is 77+/-14(stat)+/-19(syst) ps. The central value of mean lifetime corresponds to a B(E2;2+(1)-->0(+)) value of 0.63e(2) fm(4), or 0.26 Weisskopf units. The transition strength is found to be anomalously small compared to the empirically predicted value.
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