Is the 7/2(1)- isomer state of 43S spherical?

R Chevrier,J M Daugas,L Gaudefroy,Y Ichikawa,H Ueno,M Hass, H Haas,S Cottenier,N Aoi,K Asahi,D L Balabanski,N Fukuda,T Furukawa,G Georgiev,H Hayashi,H Iijima,N Inabe,T Inoue,M Ishihara,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

Physical review letters（2012）

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摘要

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.

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关键词

inversion,stability,fragmentation,quadrupole moment

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