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Physical Review Letters 108 (2012) 162501
Is the 7/2(1)(-) Isomer State of S-43 Spherical?
R. Chevrier1, J.M. Daugas1, L. Gaudefroy1, Y. Ichikawa, H. Ueno, M. Hass, H. Haas, S. Cottenier, N. Aoi, K. Asahi, D.L. Balabanski, N. Fukuda, T. Furukawa, G. Georgiev2, H. Hayashi, H. Iijima, N. Inabe, T. Inoue, M. Hishihara, Y. Ishii, D. Kameda, T. Kubo, T. Nanao, G. Neyens, T. Ohnishi, M.M. Rajabali, K. Suzuki, H. Takeda, M. Tsuchiya, N. Vermeulen, H. Watanabe, A. Yoshimi
(2012)

We report on the spectroscopic quadrupole moment measurement of the 7/2(1)(-) isomeric state in S-43(16)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, vertical bar Q(s) vertical bar = 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 vertical bar Q(s) vertical bar, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.
1 :  DAM/DIF - DAM Île-de-France
2 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
CSNSM SNO
Physique/Physique Nucléaire Expérimentale
NEUTRON-RICH NUCLEI – N=28 SHELL CLOSURE – QUADRUPOLE-MOMENT – FRAGMENTATION – INVERSION – STABILITY – PYRITE – BORDER – ISLAND – FE-57