Erratum: Investigating nuclear shell structure in the vicinity of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ni</mml:mi><mml:mprescripts /><mml:none /><mml:mn>78</mml:mn></mml:mmultiscripts></mml:math>: Low-lying excited states in the neutron-rich isotopes<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Zn</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>80</mml:mn><mml:mo>,</mml:mo><mml:mn>82</mml:mn></mml:mrow></mml:mmulti

Shiga, Yoshinori; Yoneda, K.; Steppenbeck, D.; Aoi, N.; Doornenbal, P.; Lee, J.; Liu, H.; Matsushita, M.; Takeuchi, Satoshi; Wang, H.; Baba, H.; Bednarczyk, P.; Dombrádi, Zs.; Fülöp, Zs.; Go, S.; Hashimoto, T.; Honma, Mareki; Ideguchi, E.; Ieki, K.; Kobayashi, K.; Kondo, Y.; Minakata, R.; Motobayashi, T.; Nishimura, D.; Otsuka, Takaharu; Otsu, H.; Sakuraï, H.; Shimizu, Noritaka; Sohler, D.; Sun, Y.; Tamii, A.; Tanaka, R.; Tian, Zhuang; Tsunoda, Y.; Vajta, Zs.; Yamamoto, Tatsuya; Yang, Xiaofei; Yang, Z.; Ye, Y.; Yokoyama, R.; Zenihiro, J.

doi:10.1103/physrevc.93.049904

Cited by 6 publications

(5 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The lowering of transition probability B(E2) in the Ge isotopes up to 82 Ge also indicates that the N = 50 shell closure remains in the neutron-rich nuclei [9][10][11]. The higher energy of the 2 + 1 state and the lower B(E2) value measured in 80 Zn [12] and the recently observed 4 + 1 state [13] further confirmed the persistent N = 50 shell closure in 78 Ni. However, looking at the Ni isotopes, the E(2 + 1 ) value decreases up to N = 48 and the B(E2) value increases up to N = 46 [14].…”

Section: Introductionsupporting

confidence: 62%

“…The neutron magic number N = 50 around the very neutron-rich nucleus 78 Ni (N/Z ∼ 1.8) has attracted a considerable interest not only in a view of nuclear structure but in a point of the r-process nucleosynthesis: 78 Ni can be a doubly-magic nucleus and an important waiting point serving as a bottleneck in the synthesis of heavy elements [3]. Therefore, there have been a numerous number of experimental efforts on if the N = 50 magic number survives in 78 Ni [4][5][6][7][8][9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Suddenly shortened half-lives beyond Ni78:N=50 magic number and high-energy nonunique first-forbidden transitions

Yoshida

2019

Phys. Rev. C

View full text Add to dashboard Cite

Background: β-decay rates play a decisive role in understanding the nucleosynthesis of heavy elements and are governed by microscopic nuclear-structure information. A sudden shortening of the half-lives of Ni isotopes beyond N = 50 was observed at the RIKEN-RIBF. This is considered due to the persistence of the neutron magic number N = 50 in the very neutron-rich Ni isotopes. Purpose: By systematically studying the β-decay rates and strength distributions in the neutronrich Ni isotopes around N = 50, I try to understand the microscopic mechanism for the observed sudden shortening of the half-lives. Methods: The β-strength distributions in the neutron-rich nuclei are described in the framework of nuclear density-functional theory. I employ the Skyrme energy-density functionals (EDF) in the Hartree-Fock-Bogoliubov calculation for the ground states and in the proton-neutron Quasiparticle Random-Phase Approximation (pnQRPA) for the transitions. Not only the allowed but the firstforbidden (FF) transitions are considered. Results: The experimentally observed sudden shortening of the half-lives beyond N = 50 is reproduced well by the calculations employing the Skyrme SkM* and SLy4 functionals in contrast to the monotonic shortening predicted in the preceding calculation using the SkO' functional. Conclusions: The sudden shortening of the half-lives beyond N = 50 in the neutron-rich Ni isotopes is due to the shell gap at N = 50 and cooperatively with the high-energy transitions to the low-lying 0 − and 1 − states in the daughter nuclei. The onset of FF transitions pointed out around N = 82 and 126 is preserved in the lower-mass nuclei around N = 50. This study suggests that needed is a microscopic calculation where the shell structure in neutron-rich nuclei and its associated effects on the FF transitions are selfconsistenly taken into account for predicting β-decay rates of exotic nuclei in unknown region.

show abstract

Section: Introductionsupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Suddenly shortened half-lives beyond Ni78:N=50 magic number and high-energy nonunique first-forbidden transitions

Yoshida

2019

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…Evidence for the robustness of the Z = 50 gap and the possibility of inversion of proton orbitals has been seen in 78,80 Zn 48,50 [737,738], supported by evidence for SC in 79 Zn 49 [739,740]. Large-scale shell-model [738][739][740] and MCSM [737] calculations support these findings.…”

Section: The Zn (Z = 30) Isotopesmentioning

confidence: 71%

Shape Coexistence in Even–Even Nuclei: A Theoretical Overview

Bonatsos,

Martinou,

Peroulis

et al. 2023

Atoms

View full text Add to dashboard Cite

The last decade has seen a rapid growth in our understanding of the microscopic origins of shape coexistence, assisted by the new data provided by the modern radioactive ion beam facilities built worldwide. Islands of the nuclear chart in which shape coexistence can occur have been identified, and the different microscopic particle–hole excitation mechanisms leading to neutron-induced or proton-induced shape coexistence have been clarified. The relation of shape coexistence to the islands of inversion, appearing in light nuclei, to the new spin-aligned phase appearing in N=Z nuclei, as well as to shape/phase transitions occurring in medium mass and heavy nuclei, has been understood. In the present review, these developments are considered within the shell-model and mean-field approaches, as well as by symmetry methods. In addition, based on systematics of data, as well as on symmetry considerations, quantitative rules are developed, predicting regions in which shape coexistence can appear, as a possible guide for further experimental efforts that can help in improving our understanding of the details of the nucleon–nucleon interaction, as well as of its modifications occurring far from stability.

show abstract

“…In-beam γ-ray spectroscopy of low-lying level structures of nuclei in the vicinity of 78 Ni also indicated its doubly magicity. 26 Recently, two back to back studies by Olivier et al 27 and Welker et al 28 have hallmarked 78 Ni as a strong doubly magic nucleus. The doubly magic character in 78 Ni has already been reported by many theoretical calculations including shell-model calculations, 20 relativistic mean-field model using TMA parameter, 29 relativistic continuum Hartree-Bogoliubov theory 30 and First-Principles computations.…”

Section: Introductionmentioning

confidence: 99%

Persistence of magicity in neutron-rich exotic 78Ni in ground as well as excited states

Aggarwal

Saxena²

2018

Int. J. Mod. Phys. E

View full text Add to dashboard Cite

Recent experimental observation of magicity in 78 Ni has infused the interest to examine the persistence of the magic character across the N=50 shell gap in extremely neutron rich exotic nucleus 78 Ni in ground as well as excited states. A systematic study of Ni isotopes and N=50 isotones in ground state is performed within the microscopic framework of relativistic mean-field (RMF) and the triaxially deformed Nilson Strutinsky model (NSM). Ground state density distributions, charge form factors, radii, separation energies, pairing energies, single particle energies and the shell corrections show strong magicity in 78 Ni. Excited nuclei are treated within the statistical theory of hot rotating nuclei where the variation of level density parameter and entropy shows significant magicity with a deep minima at N=50, which, persists up to the temperatures ≈ 1.5−2 MeV and then slowly disappear with increasing temperature. Rotational states are evaluated and effect of rotation on N=50 (Z=20−30) isotones are studied. Our results agree very well with the available experimental data and few other theoretical calculations.

show abstract

Erratum: Investigating nuclear shell structure in the vicinity ofNi78: Low-lying excited states in the neutron-rich isotopesZn80,82

Cited by 6 publications

References 0 publications

Suddenly shortened half-lives beyond Ni78:N=50 magic number and high-energy nonunique first-forbidden transitions

Suddenly shortened half-lives beyond Ni78:N=50 magic number and high-energy nonunique first-forbidden transitions

Shape Coexistence in Even–Even Nuclei: A Theoretical Overview

Persistence of magicity in neutron-rich exotic 78Ni in ground as well as excited states

Contact Info

Product

Resources

About