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  Shape staggering of mid-shell mercury isotopes from in-source laser spectroscopy compared with Density Functional Theory and Monte Carlo Shell Model calculations

Sels, S., Goodacre, T. D., Marsh, B. A., Pastore, A., Ryssens, W., Tsunoda, Y., et al. (2019). Shape staggering of mid-shell mercury isotopes from in-source laser spectroscopy compared with Density Functional Theory and Monte Carlo Shell Model calculations. Physical Review C, 99: 044306. doi:10.1103/PhysRevC.99.044306.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-7D47-2 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-7D48-1
Genre: Journal Article


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Sels, S.1, Author
Goodacre, T. Day1, Author
Marsh, B. A.1, Author
Pastore, A.1, Author
Ryssens, W.1, Author
Tsunoda, Y.1, Author
Althubiti, N.1, Author
Andel, B.1, Author
Andreyev, A. N.1, Author
Atanasov, Dinko2, Author              
Barzakh, A. E.1, Author
Bender, M.1, Author
Billowes, J.1, Author
Blaum, Klaus2, Author              
Cocolios, T. E.1, Author
Cubiss, J. G.1, Author
Dobaczewski, J.1, Author
Farooq-Smith, G. J.1, Author
Fedorov, D. V.1, Author
Fedosseev, V. N.1, Author
Flanagan, K. T.1, AuthorGaffney, L. P.1, AuthorGhys, L.1, AuthorHeenen, P-H.1, AuthorHuyse, M.1, AuthorKreim, Susanne Waltraud2, Author              Lunney, D.1, AuthorLynch, K. M.1, AuthorManea, Vladimir2, Author              Palenzuela, Y. Martinez1, AuthorMedonca, T. M.1, AuthorMolkanov, P. L.1, AuthorOtsuka, T.1, AuthorRamos, J. P.1, AuthorRossel, R. E.1, AuthorRothe, S.1, AuthorSchweikhard, L.1, AuthorSeliverstov, M. D.1, AuthorSpagnoletti, P.1, AuthorVan Beveren, C.1, AuthorVan Duppen, P.1, AuthorVeinhard, M.1, AuthorVerstraelen, E.1, AuthorWelker, A.1, AuthorWendt, K.1, AuthorWienholtz, F.1, AuthorWolf, Robert2, Author              Zadvornaya, A.1, Author more..
1KU Leuven, Instituut voor Kern-en Stralingsfyisca, B-3001 Leuven, Belgium School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom CERN, CH-1211 Geneve 23, Switzerland Department of Physics, University of York, York Y010 5DD, United Kingdom IPNL, Université de Lyon, Université Lyon 1, CNRS/IN2P3, F-69622 Villeurbanne, France Department of Physics, The University of Tokyo, Bunkyo-ku, 113-0033 Tokyo, Japan Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, ul. Pasteura 5, PL-02-093 Warsaw, Poland School of Engineering and Computing, University of the West of Scotland, Paisley, PA1 2BE, United Kingdom Belgian Nuclear Research Center SCK•CEN, Boeretang 200, B-2400 Mol, Belgium PNTPM, CP229, Universite Libre de Bruxelles, B-1050 Bruxelles, Belgium CSNSM-IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, USA Laboratory of Powder Technology, École polytechnique fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland Insitut fürPhysik, Johannes Gutenberg-Universität, 55122 Mainz, Germany Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany Technische Universitat Dresden, 01069 Dresden, Germany , ou_persistent22              
2Division Prof. Dr. Klaus Blaum, MPI for Nuclear Physics, Max Planck Society, ou_904548              


Free keywords: Nuclear Experiment, nucl-ex,Nuclear Theory, nucl-th
 MPINP: Präzisionsexperimente - Abteilung Blaum
 Abstract: Neutron-deficient $^{177-185}$Hg isotopes were studied using in-source laser resonance-ionization spectroscopy at the CERN-ISOLDE radioactive ion-beam facility, in an experiment combining different detection methods tailored to the studied isotopes. These include either alpha-decay tagging or Multi-reflection Time-of-Flight gating to identify the isotopes of interest. The endpoint of the odd-even nuclear shape staggering in mercury was observed directly by measuring for the first time the isotope shifts and hyperfine structures of $^{177-180}$Hg. Changes in the mean-square charge radii for all mentioned isotopes, magnetic dipole and electric quadrupole moments of the odd-A isotopes and arguments in favor of $I = 7/2$ spin assignment for $^{177,179}$Hg were deduced. Experimental results are compared with Density Functional Theory (DFT) and Monte-Carlo Shell Model (MCSM) calculations. DFT calculations with several Skyrme parameterizations predict a large jump in the charge radius around the neutron $N = 104$ mid shell, with an odd-even staggering pattern related to the coexistence of nearly-degenerate oblate and prolate minima. This near-degeneracy is highly sensitive to many aspects of the effective interaction, a fact that renders perfect agreement with experiment out of reach for current functionals. Despite this inherent diffculty, the SLy5s1 and a modified UNEDF1^{SO} parameterization predict a qualitatively correct staggering that is off by two neutron numbers. MCSM calculations of states with the experimental spins and parities show good agreement for both electromagnetic moments and the observed charge radii. A clear mechanism for the origin of shape staggering within this context is identified: a substantial change in occupancy of the proton $\pi h_{9/2}$ and neutron $\nu i_{13/2}$ orbitals.


Language(s): eng - English
 Dates: 2019-02-282019-04-12
 Publication Status: Published in print
 Pages: 19 pages, 18 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: arXiv: 1902.11211
DOI: 10.1103/PhysRevC.99.044306
 Degree: -



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Source 1

Title: Physical Review C
  Other : Phys. Rev. C
Source Genre: Journal
Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 99 Sequence Number: 044306 Start / End Page: - Identifier: ISSN: 0556-2813
CoNE: https://pure.mpg.de/cone/journals/resource/954925225009