Emerging collectivity in neutron-hole transitions near doubly magic 208Pb

Gerathy, M. S. M.; Mitchell, A. J.; Lane, G. J.; Stuchbery, A.E.; Akber, A.; Alshammari, H.A.; Bignell, L. J.; Coombes, B. J.; Dowie, J. T. H.; Gray, Tom J.; Kibédi, T.; McCormick, B. P.; McKie, L.J.; Rahman, Md. Shahinur; Reece, Margaret; Spinks, N. J.; Tee, B.P.E.; Zhong, Yi-Ming; Zhu, K.

doi:10.1016/j.physletb.2021.136738

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…The results point to an increase of collectivity by a factor 1.39 (11) compared to the one of the 128 Sn core. Shell-model calculations confirm the observed systematic increase of quadrupole collectivity along the N=125 isotonic chain [7] as well as for the multiplet in 129 Sb [8], although they underestimate the experimental B(E2) values in both cases. The observed collectivity enhancement could be ascribed to a constructive quadrupole interference originated by the proton-neutron interaction, going beyond a weak particle -core coupling scheme [9,10].…”

Section: Introductionsupporting

confidence: 57%

“…The emergence of collectivity can be investigated moving away from shell closures by a few particles or holes on both proton and neutron sides. Recently, this was studied around two doubly-magic nuclei, namely 208 Pb [7] and 132 Sn [8], by looking at the low-lying electric quadrupole strengths. In the first case, the 5/2 nuclei with respect to doubly magic 208 82 Pb 126 .…”

Section: Introductionmentioning

confidence: 99%

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Testing the predictive power of realistic shell model calculations via lifetime measurement of the 11/2+ state in Sb131

et al. 2023

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Section: Introductionsupporting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Testing the predictive power of realistic shell model calculations via lifetime measurement of the 11/2+ state in Sb131

et al. 2023

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“…Particle(hole) core couplings can be investigated around shell closures by adding or removing particles (holes) on both proton and neutron sides. This was recently studied around 40 Ca and 48 Ca [1], 132 Sn [2,3], and 208 Pb [4]. In Sb nuclei (Z=51), the energies of the 11/2 + 1 states are similar to those of the 2 + states in the underlying Sn nuclei [5], pointing to a possible core-proton coupling scheme.…”

Section: Introductionmentioning

confidence: 99%

Lifetime measurements in ¹³¹Sb at LOHENGRIN

Bottoni,

Gamba,

De Gregorio

et al. 2023

J. Phys.: Conf. Ser.

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The neutron-rich 131Sb nucleus was studied at Institut Laue-Langevin, with the LOHENGRIN spectrometer, via neutron-induced fission of 235U and lifetime measurements using LaBr3(Ce) detectors. The lifetimes of the 11 / 2 1 + and 19 / 2 1 + states were measured with the generalized centroid difference and the decay slope methods, yielding T½=3(2) ps and T½=1347(171) ps, respectively. The measured value for the 11 / 2 1 + is at the limit of the fast-timing technique. The level scheme of 131Sb and the decay properties of the 11 / 2 1 + state were described by realistic shell-model calculations, which reproduce well both the experimental spin and energy sequences of 131Sb and the measured B(E2; 11 / 2 1 + → 7 / 2 1 + ) value, pointing to an almost pure 2+(130Sn) ⊗ πg7/2, core-proton coupled configuration for the 11 / 2 1 + state.

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