Anomalously hindered E2 strength B(E2;2+(1)-->0+) in 16C.
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.
Imai
N
N
RIKEN, Hirosawa 2-1, Wako, Saitama 351-0198, Japan. imai@rarfaxp.riken.go.jp
Ong
H J
HJ
Aoi
N
N
Sakurai
H
H
Demichi
K
K
Kawasaki
H
H
Baba
H
H
Dombrádi
Zs
Z
Elekes
Z
Z
Fukuda
N
N
Fülöp
Zs
Z
Gelberg
A
A
Gomi
T
T
Hasegawa
H
H
Ishikawa
K
K
Iwasaki
H
H
Kaneko
E
E
Kanno
S
S
Kishida
T
T
Kondo
Y
Y
Kubo
T
T
Kurita
K
K
Michimasa
S
S
Minemura
T
T
Miura
M
M
Motobayashi
T
T
Nakamura
T
T
Notani
M
M
Onishi
T K
TK
Saito
A
A
Shimoura
S
S
Sugimoto
T
T
Suzuki
M K
MK
Takeshita
E
E
Takeuchi
S
S
Tamaki
M
M
Yamada
K
K
Yoneda
K
K
Watanabe
H
H
Ishihara
M
M