%0 Journal Article %1 GRAY2023138268 %A Gray, T.J. %A Stuchbery, A.E. %A Dobaczewski, J. %A Blazhev, A. %A Alshammari, H.A. %A Bignell, L.J. %A Bonnard, J. %A Coombes, B.J. %A Dowie, J.T.H. %A Gerathy, M.S.M. %A Kibédi, T. %A Lane, G.J. %A McCormick, B.P. %A Mitchell, A.J. %A Nicholls, C. %A Pope, J.G. %A Reinhard, P.-G. %A Spinks, N.J. %A Zhong, Y. %D 2023 %J Physics Letters B %K blazhev myown %P 138268 %R https://doi.org/10.1016/j.physletb.2023.138268 %T Shape polarization in the tin isotopes near N = 60 from precision g-factor measurements on short-lived 11/2− isomers %U https://www.sciencedirect.com/science/article/pii/S0370269323006020 %V 847 %X 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.

@article{GRAY2023138268, 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.}, added-at = {2023-10-25T17:50:05.000+0200}, author = {Gray, T.J. and Stuchbery, A.E. and Dobaczewski, J. and Blazhev, A. and Alshammari, H.A. and Bignell, L.J. and Bonnard, J. and Coombes, B.J. and Dowie, J.T.H. and Gerathy, M.S.M. and Kibédi, T. and Lane, G.J. and McCormick, B.P. and Mitchell, A.J. and Nicholls, C. and Pope, J.G. and Reinhard, P.-G. and Spinks, N.J. and Zhong, Y.}, biburl = {https://www.bibsonomy.org/bibtex/21b40e67b63dcb530e50d5be34e30eedb/ikpcologne}, description = {Shape polarization in the tin isotopes near N = 60 from precision g-factor measurements on short-lived 11/2− isomers - ScienceDirect}, doi = {https://doi.org/10.1016/j.physletb.2023.138268}, interhash = {2ef21db76ddbb11d64365c2e7b7e08bc}, intrahash = {1b40e67b63dcb530e50d5be34e30eedb}, issn = {0370-2693}, journal = {Physics Letters B}, keywords = {blazhev myown}, pages = 138268, timestamp = {2023-10-25T17:50:05.000+0200}, title = {Shape polarization in the tin isotopes near N = 60 from precision g-factor measurements on short-lived 11/2− isomers}, url = {https://www.sciencedirect.com/science/article/pii/S0370269323006020}, volume = 847, year = 2023 }