Binding Energy of $^{79}\mathrm{Cu}$: Probing the Structure of the Doubly Magic $^{78}\mathrm{Ni}$ from Only One Proton Away

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Binding Energy of ${}^{79}{Cu}$ : Probing the Structure of the Doubly Magic ${}^{78}{Ni}$ from Only One Proton Away

A. Welker, N. A. S. Althubiti, D. Atanasov, K. Blaum, T. E. Cocolios, F. Herfurth, S. Kreim, D. Lunney, V. Manea, M. Mougeot, D. Neidherr, F. Nowacki, A. Poves, M. Rosenbusch, L. Schweikhard, F. Wienholtz, R. N. Wolf, and K. Zuber

Phys. Rev. Lett. 119, 192502 – Published 6 November 2017

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Abstract

The masses of the neutron-rich copper isotopes ${}^{75 - 79}{Cu}$ are determined using the precision mass spectrometer ISOLTRAP at the CERN-ISOLDE facility. The trend from the new data differs significantly from that of previous results, offering a first accurate view of the mass surface adjacent to the $Z = 28$ , $N = 50$ nuclide ${}^{78}{Ni}$ and supporting a doubly magic character. The new masses compare very well with large-scale shell-model calculations that predict shape coexistence in a doubly magic ${}^{78}{Ni}$ and a new island of inversion for $Z < 28$ . A coherent picture of this important exotic region begins to emerge where excitations across $Z = 28$ and $N = 50$ form a delicate equilibrium with a spherical mean field.

Received 9 June 2017

DOI:https://doi.org/10.1103/PhysRevLett.119.192502

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Binding energy & masses Nuclear structure & decays

Nuclear Physics

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Doubly Magic Nickel

Published 6 November 2017

Two independent experiments on the isotope copper-79 confirm that its nuclear neighbor nickel-78 is indeed a doubly magic nucleus.

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Authors & Affiliations

A. Welker^1,2,*, N. A. S. Althubiti³, D. Atanasov^4,†, K. Blaum⁴, T. E. Cocolios⁵, F. Herfurth⁶, S. Kreim^4,‡, D. Lunney⁷, V. Manea^2,4, M. Mougeot⁷, D. Neidherr⁶, F. Nowacki^8,9, A. Poves^10,11, M. Rosenbusch^12,§, L. Schweikhard¹², F. Wienholtz^2,12, R. N. Wolf^4,¶, and K. Zuber¹

¹Technische Universität Dresden, 01069 Dresden, Germany
²CERN Geneva, 1211 Geneva, Switzerland
³University of Manchester, Manchester M13 9PL, United Kingdom
⁴Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
⁵KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
⁶GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
⁷CSNSM-IN2P3-CNRS, Université Paris-Sud, 91405 Orsay, France
⁸Université de Strasbourg, IPHC, 67037 Strasbourg, France
⁹CNRS, UMR7178, 67037 Strasbourg, France
¹⁰Departamento de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
¹¹Institute for Advanced Study, Université de Strasbourg, 67083 Strasbourg, France
¹²Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany

^*Corresponding author. andree.welker@cern.ch
^†Present address: Technische Universität Dresden, 01069 Dresden, Germany.
^‡Present address: Fakultät für Elektrotechnik, 68163 Mannheim, Germany.
^§Present address: RIKEN Nishina Center for Accelerator-Based Science, 351-0198 Saitama, Japan.
^¶Present address: ARC Centre of Excellence for Engineered Quantum Systems, The University of Sydney, NSW 2006, Australia.

Persistence of the $Z = 28$ Shell Gap Around ${}^{78}{Ni}$ : First Spectroscopy of ${}^{79}{Cu}$

L. Olivier et al.

Phys. Rev. Lett. 119, 192501 (2017)

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Vol. 119, Iss. 19 — 10 November 2017

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Physical Review Letters

Binding Energy of ${}^{79}{Cu}$ : Probing the Structure of the Doubly Magic ${}^{78}{Ni}$ from Only One Proton Away

A. Welker, N. A. S. Althubiti, D. Atanasov, K. Blaum, T. E. Cocolios, F. Herfurth, S. Kreim, D. Lunney, V. Manea, M. Mougeot, D. Neidherr, F. Nowacki, A. Poves, M. Rosenbusch, L. Schweikhard, F. Wienholtz, R. N. Wolf, and K. Zuber

Phys. Rev. Lett. 119, 192502 – Published 6 November 2017

See Viewpoint: Doubly Magic Nickel

Abstract

Physics Subject Headings (PhySH)

Viewpoint

Doubly Magic Nickel

Published 6 November 2017

Authors & Affiliations

See Also

Persistence of the $Z = 28$ Shell Gap Around ${}^{78}{Ni}$ : First Spectroscopy of ${}^{79}{Cu}$

L. Olivier et al.

Phys. Rev. Lett. 119, 192501 (2017)

Article Text

References

Issue

Physical Review Letters

Binding Energy of Cu79: Probing the Structure of the Doubly Magic Ni78 from Only One Proton Away

A. Welker, N. A. S. Althubiti, D. Atanasov, K. Blaum, T. E. Cocolios, F. Herfurth, S. Kreim, D. Lunney, V. Manea, M. Mougeot, D. Neidherr, F. Nowacki, A. Poves, M. Rosenbusch, L. Schweikhard, F. Wienholtz, R. N. Wolf, and K. Zuber

Phys. Rev. Lett. 119, 192502 – Published 6 November 2017

See Viewpoint: Doubly Magic Nickel

Abstract

Physics Subject Headings (PhySH)

Viewpoint

Doubly Magic Nickel

Published 6 November 2017

Authors & Affiliations

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Persistence of the Z=28 Shell Gap Around Ni78: First Spectroscopy of Cu79

L. Olivier et al.

Phys. Rev. Lett. 119, 192501 (2017)

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Binding Energy of ${}^{79}{Cu}$ : Probing the Structure of the Doubly Magic ${}^{78}{Ni}$ from Only One Proton Away

Persistence of the $Z = 28$ Shell Gap Around ${}^{78}{Ni}$ : First Spectroscopy of ${}^{79}{Cu}$