New states in heavy Cd isotopes and evidence for weakening of the N = 82 shell structure

Kautzsch, T.; Walters, W. B.; Hannawald, M.; Kratz, K. L.; Mishin, V. I.; Fedoseyev, V. N.; Böhmer, W.; Jading, Y.; Duppen, P. Van; Pfeiffer, B.; Wöhr, A.; Möller, P.; Klöckl, I.; Sebastian, V.; Köster, U.; Koizumi, M.; Lettry, J.; Ravn, H. L.

doi:10.1007/s100500070038

Cited by 78 publications

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“…Neutron-rich 126 Cd and 128 Cd isotopes were recently produced [2] at ISOLDE from the beta-decay of Ag isotopes. However, only the first 2 + and 4 + states were identified and are shown in fig.…”

Section: B Even In Nucleimentioning

confidence: 99%

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Neutron-rich In and Cd isotopes close to the doubly magicSn132

et al. 2004

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Section: B Even In Nucleimentioning

confidence: 99%

Section: B Even In Nucleimentioning

confidence: 99%

Neutron-rich In and Cd isotopes close to the doubly magicSn132

et al. 2004

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“…Although this information is still rather scarce, it seems to indicate that these nuclei possess some degree of collectivity. The authors of [2] take this as plausible evidence for a weakening of the shell structure. This is one of the reasons that spurred us to carry out a study of the neutron-rich nuclei of this region.…”

Section: Introductionmentioning

confidence: 99%

“…However, nuclear structure information is more complete for nuclei above the Z=50 shellclosure [1] (for instance, Sb and Te isotopes) than for the In and Cd isotopes, which are much more difficult to produce. Only recently, Kautzsch et al [2] have obtained some spectroscopic information on 126,128 Cd, which have two proton and two and four neutron holes, respectively, inside the 132 Sn core. Although this information is still rather scarce, it seems to indicate that these nuclei possess some degree of collectivity.…”

Section: Introductionmentioning

confidence: 99%

“…The value of E(4 + )/E(2 + ) ∼ 2.2 suggests that some degree of collectivity is present in these two nuclei. However, the authors of [2] have taken this as a possible evidence for a weakening of the spherical N =82 neutron shell below 132 Sn. It is now interesting to compare 128 Cd with 204 Hg (fig 8), since the latter has two neutron and two proton holes inside doubly-magic 208 Pb (fig 8) and possesses some degree of collectivity.…”

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Neutron-Rich In and Cd Isotopes Close to the Doubly-Magic 132Sn

Scherillo¹

2005

AIP Conference Proceedings

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Nuclear structure far off stability —Implications for nuclear astrophysics

Grawe¹,

Blazhev²,

Górska³

et al.

The 2nd International Conference on Nuclear Physics in Astrophysics

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Abstract. The single-particle structure and shell gap of 100 Sn as inferred from previous in-beam γ-ray spectroscopy has been confirmed in recent studies of seniority and spin-gap isomers by γγ, βγ, βpγ, pγ and 2pγ spectroscopy. The results for 94,95 Ag, 98 Cd and its N = 50 isotones 96 Pd and 94 Ru stress the importance of large-scale shell model calculations employing realistic interactions for the isomerism, np-nh excitations, seniority mixing and E2 polarisation of the 100 Sn core. The strong monopole interaction of the ∆l = 0, 1 spin/isospin-flip partners πg 9/2 -νg 7/2 along the N = 50 isotones and the πf 5/2 -νg 9/2 pair of nucleons along the Z = 28 Ni isotopes are decisive for the evolution of the shell structure towards 100 Sn and 78 Ni. It can be traced back to the tensor force in the effective nucleon-nucleon interaction and provides a straightforward explanation for new shells in neutron-rich light nuclei, implying qualitative predictions for new N = 32, 34 subshells in Ca isotopes, persistence of the 78 Ni proton and neutron shell gaps and non-equivalence of the g 9/2 valence mirror Ni isotopes and N = 50 isotones. This is corroborated by recent experimental data on 56,58 Cr and 70-76 Ni. The implication of monopole driven shell evolution for apparent spin-orbit splitting towards N Z and structure along the astrophysical r-path between N = 50 and N = 82 is discussed.

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New states in heavy Cd isotopes and evidence for weakening of the N = 82 shell structure

Cited by 78 publications

References 0 publications

Neutron-rich In and Cd isotopes close to the doubly magicSn132

Neutron-rich In and Cd isotopes close to the doubly magicSn132

Neutron-Rich In and Cd Isotopes Close to the Doubly-Magic 132Sn

Nuclear structure far off stability —Implications for nuclear astrophysics

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