Is the 7/2− 1 isomeric state of 43S spherical?

A1 publication

Journal title

Physical Review Letters

Publication date

April 2012

Volume, issue & page range or art. n

108, (16), 162501.

Year

2012

Authors

Chevrier R.; Daugas J. M.; Gaudefroy L.; Ichikawa Y.; Ueno H.; Hass M.; Haas H.; Cottenier S.; Aoi N.; Asahi K.; Balabanski D. L.; Fukuda N.; Furukawa T.; Georgiev G.; Hayashi H.; Iijima H.; Inabe N.; Inoue T.; Ishihara M.; Ishii Y.; Kameda D.; Kubo T.; Nanao T.; Neyens G.; Ohnishi T.; Rajabali M. M.; Suzuki K.; Takeda H.; Tsuchiya M.; Vermeulen N.; Watanabe H.; Yoshimi A.

Abstract

We report on the spectroscopic quadrupole moment measurement of the 7/21- isomeric state in 1643S27 [E*=320.5(5) keV, T1/2=415(3) ns], using the time dependent perturbed angular distribution technique at the RIKEN RIBF facility. Our value, ∣Qs∣=23(3) efm2, 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 ∣Qs∣, and show that non-negligible correlations drive the isomeric state away from a purely spherical shape.

DOI

http://dx.doi.org/10.1103/PhysRevLett.108.162501

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Is the 7/2− 1 isomeric state of 43S spherical?