Is the 7/2(1)- isomer state of 43S spherical?
We report on the spectroscopic quadrupole moment measurement of the 7/2(1)(-) isomeric state in (16)(43)S(27) [E*=320.5(5) keV, T(1/2)=415(3) ns], using the time dependent perturbed angular distribution technique at the RIKEN RIBF facility. Our value, |Q(s)|=23(3) efm(2), is larger than that expected for a single-particle state. Shell model calculations using the modern SDPF-U interaction for this mass region reproduce remarkably well the measured |Q(s)|, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.
CEA, DAM, DIF, F-91297 Arpajon, France.
R
R
Chevrier
J M
JM
Daugas
L
L
Gaudefroy
Y
Y
Ichikawa
H
H
Ueno
M
M
Hass
H
H
Haas
S
S
Cottenier
N
N
Aoi
K
K
Asahi
D L
DL
Balabanski
N
N
Fukuda
T
T
Furukawa
G
G
Georgiev
H
H
Hayashi
H
H
Iijima
N
N
Inabe
T
T
Inoue
M
M
Ishihara
Y
Y
Ishii
D
D
Kameda
T
T
Kubo
T
T
Nanao
G
G
Neyens
T
T
Ohnishi
M M
MM
Rajabali
K
K
Suzuki
H
H
Takeda
M
M
Tsuchiya
N
N
Vermeulen
H
H
Watanabe
A
A
Yoshimi