• Open Access

Precision Mass Measurements of Cr5863: Nuclear Collectivity Towards the N=40 Island of Inversion

M. Mougeot, D. Atanasov, K. Blaum, K. Chrysalidis, T. Day Goodacre, D. Fedorov, V. Fedosseev, S. George, F. Herfurth, J. D. Holt, D. Lunney, V. Manea, B. Marsh, D. Neidherr, M. Rosenbusch, S. Rothe, L. Schweikhard, A. Schwenk, C. Seiffert, J. Simonis, S. R. Stroberg, A. Welker, F. Wienholtz, R. N. Wolf, and K. Zuber
Phys. Rev. Lett. 120, 232501 – Published 6 June 2018

Abstract

The neutron-rich isotopes Cr5863 were produced for the first time at the ISOLDE facility and their masses were measured with the ISOLTRAP spectrometer. The new values are up to 300 times more precise than those in the literature and indicate significantly different nuclear structure from the new mass-surface trend. A gradual onset of deformation is found in this proton and neutron midshell region, which is a gateway to the second island of inversion around N=40. In addition to comparisons with density-functional theory and large-scale shell-model calculations, we present predictions from the valence-space formulation of the ab initio in-medium similarity renormalization group, the first such results for open-shell chromium isotopes.

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  • Received 22 November 2017
  • Revised 6 March 2018

DOI:https://doi.org/10.1103/PhysRevLett.120.232501

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)

Nuclear Physics

Authors & Affiliations

M. Mougeot1,*, D. Atanasov2,†, K. Blaum2, K. Chrysalidis3,12, T. Day Goodacre3,13,‡, D. Fedorov4, V. Fedosseev3, S. George2,§, F. Herfurth5, J. D. Holt6, D. Lunney1, V. Manea3, B. Marsh3, D. Neidherr5, M. Rosenbusch7,∥, S. Rothe3, L. Schweikhard7, A. Schwenk8,9,2, C. Seiffert3, J. Simonis10,8,9, S. R. Stroberg6, A. Welker11,¶, F. Wienholtz7,¶, R. N. Wolf2,**, and K. Zuber11

  • 1CSNSM-IN2P3-CNRS, Université Paris-Sud, Orsay 91405, France
  • 2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, Heidelberg 69117, Germany
  • 3CERN, Geneva 1211, Switzerland
  • 4Petersburg Nuclear Physics Institute, Gatchina 188300, Russia
  • 5GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt 64291, Germany
  • 6TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
  • 7Universität Greifswald, Institut für Physik, Greifswald 17487, Germany
  • 8Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt 64289, Germany
  • 9ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt 64291, Germany
  • 10Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, Mainz 55099, Germany
  • 11Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
  • 12Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
  • 13School of Physics Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom

  • *Corresponding author. maxime.mougeot@csnsm.in2p3.fr
  • Present address: Technische Universität Dresden, 01069 Dresden, Germany.
  • Present address: TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada.
  • §Present address: Ernst-Moritz-Arndt-Universität, Institut für Physik, Greifswald 17487, Germany.
  • Present address: RIKEN Nishina Center for Accelerator-Based Science, Wako, Saitama 351-0198, Japan.
  • Present address: CERN, 1211 Geneva, Switzerland.
  • **Present address: ARC Centre of Excellence for Engineered Quantum Systems, The University of Sydney, NSW 2006, Australia.

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Vol. 120, Iss. 23 — 8 June 2018

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