Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of 75Cu

Ichikawa, Y.; Nıshıbata, H.; Tsunoda, Y.; Takamine, A.; Imamura, K.; Fujita, Tomomi; Satô, Tôru; Momiyama, S.; Shimizu, Y.; Ahn, D. S.; Asahı, K.; Baba, H.; Balabanski, D. L.; BOULAY, F. R. H. DU; Daugas, J. M.; Egami, T.; Fukuda, N.; Funayama, C.; Furukawa, T.; Георгиев, Г.; Gladkov, A.; Inabe, N.; Ishibashi, Yuji; Kawaguchi, Takafumi; Kawamura, T.; Kobayashi, Yoshio; Kojima, Sadaoki; Kuşoğlu, A.; Mukul, Ish; Nııkura, M.; Nishizaka, T.; Odahara, A.; Ohtomo, Yuichi; Otsuka, Takaharu; Ralet, D.; Simpson, G. S.; Sumikama, T.; Suzuki, Hiroshi; Takeda, Hiroyuki; Tao, L. C.; Togano, Y.; Tominaga, D.; Ueno, H.; Yamazaki, H.; Yang, Xiaofei

doi:10.1038/s41567-018-0410-7

Cited by 28 publications

(13 citation statements)

References 40 publications

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“…Note that while the origin of the shell evolution can be any part of the NN interaction, its appearance is exemplified graphically in Figure 5a-c for the tensor force. The shell-evolution trend depicted in Figure 6 appears to be consistent with experiment [15,25,[38][39][40][41][42]. The monopole properties discussed in this subsection are consistent with the results shown by Smirnova et al [43] obtained through the spin-tensor decomposition (see e.g., [15] for some account) for the "well-fitted realistic interaction for the sdpf shell-model space" [43].…”

Section: Monopole-interaction Effects From the Central And Tensor For...supporting

confidence: 87%

“…Figure 8 shows that the possible significant change in the neutron 2p 3/2 -2p 1/2 gap between 35 Si and 37 S is explained to a good extent by the shell evolution due to the two-body spin-orbit force. 39 Ar [50], and 41 Ca [50,51]. The horizontal bars are the energy differences between relevant highest peaks [50,52].…”

Section: Monopole Interaction Of the Two-body Spin-orbit Forcementioning

confidence: 99%

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Emerging Concepts in Nuclear Structure Based on the Shell Model

Otsuka

2022

Physics

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Some emerging concepts of nuclear structure are overviewed. (i) Background: the many-body quantum structure of atomic nucleus, a complex system comprising protons and neutrons (called nucleons collectively), has been studied largely based on the idea of the quantum liquid (à la Landau), where nucleons are quasiparticles moving in a (mean) potential well, with weak “residual” interactions between nucleons. The potential is rigid in general, although it can be anisotropic. While this view was a good starting point, it is time to look into kaleidoscopic aspects of the nuclear structure brought in by underlying dynamics and nuclear forces. (ii) Methods: exotic features as well as classical issues are investigated from fresh viewpoints based on the shell model and nucleon–nucleon interactions. The 70-year progress of the shell–model approach, including effective nucleon–nucleon interactions, enables us to do this. (iii) Results: we go beyond the picture of the solid potential well by activating the monopole interactions of the nuclear forces. This produces notable consequences in key features such as the shell/magic structure, the shape deformation, the dripline, etc. These consequences are understood with emerging concepts such as shell evolution (including type-II), T-plot, self-organization (for collective bands), triaxial-shape dominance, new dripline mechanism, etc. The resulting predictions and analyses agree with experiment. (iv) Conclusion: atomic nuclei are surprisingly richer objects than initially thought.

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Section: Monopole-interaction Effects From the Central And Tensor For...supporting

confidence: 87%

Section: Monopole Interaction Of the Two-body Spin-orbit Forcementioning

confidence: 99%

Emerging Concepts in Nuclear Structure Based on the Shell Model

Otsuka

2022

Physics

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“…A spin-parity of 5/2 − is suggested for its ground state (g.s), while the 3/2 − first-excited state is proposed at a high energy of 656 keV [10]. The lowering of the 5/2 − state and eventual inversion with the 3/2 − is shown for the Cu isotopic chain by recent Monte Carlo shell-model (MCSM) calculations [9]. The 79 Cu results are consistent with the description of 80 Zn, two protons above 78 Ni, in terms of two-proton configurations on top of the 78 Ni core [12], which also confirm the persistence of the N = 50 shell closure.…”

Section: Introductionmentioning

confidence: 91%

Fast-timing study of $^{81}$Ga from the $β$ decay of $^{81}$Zn

Paziy,

Fraile,

Mach

et al. 2020

Preprint

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The β − decay of 81 Zn to the neutron magic N = 50 nucleus 81 Ga, with only three valence protons with respect to 78 Ni, was investigated. The study was performed at the ISOLDE facility at CERN by means of γ spectroscopy. The 81 Zn half-life was determined to be T 1/2 = 290(4) ms while the β-delayed neutron emission probability was measured as Pn = 23(4)%. The analysis of the β-gated γ-ray singles and γ-γ coincidences from the decay of 81 Zn provides 47 new levels and 70 new transitions in 81 Ga. The β − n decay of 81 Zn was observed and a new decay scheme into the odd-odd 80 Ga nucleus was established. The half-lives of the first and second excited states of 81 Ga were measured via the fast-timing method using LaBr3(Ce) detectors. The level scheme and transition rates are compared to large-scale shell-model calculations. The low-lying structure of 81 Ga is interpreted in terms of the coupling of the three valence protons outside the doubly-magic 78 Ni core.

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“…In this context, mapping the Z = 28 isotopes and the N = 50 isotones is of great interest. Monopole drifts have been observed in neighboring Z = 29 Cu isotopes leading to the modification of ground-state configurations [8,9], which may also point to a weakening of the Z = 28 gap.…”

Section: Introductionmentioning

confidence: 99%

“…A spin parity of 5/2 − is suggested for its ground state (gs), while the 3/2 − first-excited state is proposed at a high energy of 656 keV [10]. The lowering of the 5/2 − state and eventual inversion with the 3/2 − is shown for the Cu isotopic chain by recent Monte Carlo shell-model calculations [9]. The 79 Cu results are consistent with the description of 80 Zn, two protons above 78 Ni, in terms of two-proton configurations on top of the 78 Ni core [12], which also confirm the persistence of the N = 50 shell closure.…”

Section: Introductionmentioning

confidence: 99%

Fast-timing study of Ga81 from the β decay of Zn81

Paziy¹,

Fraile²,

Mach³

et al. 2020

Phys. Rev. C

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The β − decay of 81 Zn to the neutron magic N = 50 nucleus 81 Ga, with only three valence protons with respect to 78 Ni, was investigated. The study was performed at the ISOLDE facility at CERN by means of γ spectroscopy. The 81 Zn half-life was determined to be T 1/2 = 290(4) ms while the β-delayed neutron emission probability was measured as P n = 23(4)%. The analysis of the β-gated γ -ray singles and γ -γ coincidences from the decay of 81 Zn provides 47 new levels and 70 new transitions in 81 Ga. The β − n decay of 81 Zn was observed and a new decay scheme into the odd-odd 80 Ga nucleus was established. The half-lives of the first and second excited states of 81 Ga were measured via the fast-timing method using LaBr 3 (Ce) detectors. The level scheme and transition rates are compared to large-scale shell-model calculations. The low-lying structure of 81 Ga is interpreted in terms of the coupling of the three valence protons outside the doubly magic 78 Ni core.

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Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of 75Cu

Cited by 28 publications

References 40 publications

Emerging Concepts in Nuclear Structure Based on the Shell Model

Emerging Concepts in Nuclear Structure Based on the Shell Model

Fast-timing study of $^{81}$Ga from the $β$ decay of $^{81}$Zn

Fast-timing study of Ga81 from the β decay of Zn81

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