Gray, T.J., Stuchbery, A.E., Dobaczewski, J. orcid.org/0000-0002-4158-3770 et al. (16 more authors) (2023) Shape polarization in the tin isotopes near N = 60 from precision g-factor measurements on short-lived 11/2− isomers. Physics Letters B. 138268. ISSN 0370-2693
Abstract
The g factors of 11/2− isomers in semimagic 109Sn and 111Sn (isomeric lifetimes τ=2.9(3) ns and τ=14.4(7) ns, respectively) were measured by an extension of the Time Differential Perturbed Angular Distribution technique, which uses LaBr3 detectors and the hyperfine fields of a gadolinium host to achieve precise measurements in a new regime of short-lived isomers. The results, g(11/2−;109Sn)=−0.186(8) and g(11/2−;111Sn)=−0.214(4), are significantly lower in magnitude than those of the 11/2− isomers in the heavier isotopes and depart from the value expected for a near pure neutron h11/2 configuration. Broken-symmetry density functional theory calculations applied to the sequence of 11/2− states reproduce the magnitude and location of this deviation. The g(11/2−) values are affected by shape core polarization; the odd 0h11/2 neutron couples to Jπ=2+,4+,6+... configurations in the weakly-deformed effective core, causing a decrease in the g-factor magnitudes.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 Oak Ridge National Laboratory. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Physics (York) |
Funding Information: | Funder Grant number SCIENCE AND TECHNOLOGY FACILITIES COUNCIL (STFC) ST/V001035/1 |
Depositing User: | Pure (York) |
Date Deposited: | 22 Dec 2023 09:20 |
Last Modified: | 03 Apr 2025 04:27 |
Published Version: | https://doi.org/10.1016/j.physletb.2023.138268 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1016/j.physletb.2023.138268 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:206897 |