1
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König K, Fritzsche S, Hagen G, Holt JD, Klose A, Lantis J, Liu Y, Minamisono K, Miyagi T, Nazarewicz W, Papenbrock T, Pineda SV, Powel R, Reinhard PG. Surprising Charge-Radius Kink in the Sc Isotopes at N=20. PHYSICAL REVIEW LETTERS 2023; 131:102501. [PMID: 37739365 DOI: 10.1103/physrevlett.131.102501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 05/10/2023] [Accepted: 06/21/2023] [Indexed: 09/24/2023]
Abstract
Charge radii of neutron deficient ^{40}Sc and ^{41}Sc nuclei were determined using collinear laser spectroscopy. With the new data, the chain of Sc charge radii extends below the neutron magic number N=20 and shows a pronounced kink, generally taken as a signature of a shell closure, but one notably absent in the neighboring Ca, K, and Ar isotopic chains. Theoretical models that explain the trend at N=20 for the Ca isotopes cannot reproduce this puzzling behavior.
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Affiliation(s)
- Kristian König
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Nuclear Physics, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - Stephan Fritzsche
- Helmholtz Institute Jena, 07743 Jena, Germany
- Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universität Jena, 07743 Jena, Germany
| | - Gaute Hagen
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - Jason D Holt
- TRIUMF, Vancouver, British Colombia, V6T 2A3, Canada
- Department of Physics, McGill University, Montréal, Quebec, H3A 2T8, Canada
| | - Andrew Klose
- Department of Chemistry and Biochemistry, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Jeremy Lantis
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Yuan Liu
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - Kei Minamisono
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Takayuki Miyagi
- Department of Nuclear Physics, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Witold Nazarewicz
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Thomas Papenbrock
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Skyy V Pineda
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Robert Powel
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
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2
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Sommer F, König K, Rossi DM, Everett N, Garand D, de Groote RP, Holt JD, Imgram P, Incorvati A, Kalman C, Klose A, Lantis J, Liu Y, Miller AJ, Minamisono K, Miyagi T, Nazarewicz W, Nörtershäuser W, Pineda SV, Powel R, Reinhard PG, Renth L, Romero-Romero E, Roth R, Schwenk A, Sumithrarachchi C, Teigelhöfer A. Charge Radii of ^{55,56}Ni Reveal a Surprisingly Similar Behavior at N=28 in Ca and Ni Isotopes. PHYSICAL REVIEW LETTERS 2022; 129:132501. [PMID: 36206412 DOI: 10.1103/physrevlett.129.132501] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Revised: 06/17/2022] [Accepted: 08/09/2022] [Indexed: 06/16/2023]
Abstract
Nuclear charge radii of ^{55,56}Ni were measured by collinear laser spectroscopy. The obtained information completes the behavior of the charge radii at the shell closure of the doubly magic nucleus ^{56}Ni. The trend of charge radii across the shell closures in calcium and nickel is surprisingly similar despite the fact that the ^{56}Ni core is supposed to be much softer than the ^{48}Ca core. The very low magnetic moment μ(^{55}Ni)=-1.108(20) μ_{N} indicates the impact of M1 excitations between spin-orbit partners across the N,Z=28 shell gaps. Our charge-radii results are compared to ab initio and nuclear density functional theory calculations, showing good agreement within theoretical uncertainties.
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Affiliation(s)
- Felix Sommer
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - Kristian König
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - Dominic M Rossi
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt, Germany
| | - Nathan Everett
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - David Garand
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - Ruben P de Groote
- Department of Physics, University of Jyväskylä, Survontie 9, Jyväskylä FI-40014, Finland
| | - Jason D Holt
- TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, McGill University, Montréal, Québec H3A 2T8, Canada
| | - Phillip Imgram
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - Anthony Incorvati
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Colton Kalman
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Andrew Klose
- Department of Chemistry, Augustana University, Sioux Falls, South Dakota 57197, USA
| | - Jeremy Lantis
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Yuan Liu
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Andrew J Miller
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Kei Minamisono
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Takayuki Miyagi
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - Witold Nazarewicz
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
- Facility for Rare Isotope Beams, Michigan State University, East Lansing, Michigan 48824, USA
| | - Wilfried Nörtershäuser
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR, Campus Darmstadt, 64289 Darmstadt, Germany
| | - Skyy V Pineda
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Chemistry, Michigan State University, East Lansing, Michigan 48824, USA
| | - Robert Powel
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - Paul-Gerhard Reinhard
- Institut für Theoretische Physik II, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Laura Renth
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - Elisa Romero-Romero
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Knoxville, Tennessee 37996, USA
| | - Robert Roth
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- Helmholtz Research Academy Hesse for FAIR, Campus Darmstadt, 64289 Darmstadt, Germany
| | - Achim Schwenk
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
- Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
| | - Chandana Sumithrarachchi
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
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3
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Hur J, Aude Craik DPL, Counts I, Knyazev E, Caldwell L, Leung C, Pandey S, Berengut JC, Geddes A, Nazarewicz W, Reinhard PG, Kawasaki A, Jeon H, Jhe W, Vuletić V. Evidence of Two-Source King Plot Nonlinearity in Spectroscopic Search for New Boson. PHYSICAL REVIEW LETTERS 2022; 128:163201. [PMID: 35522508 DOI: 10.1103/physrevlett.128.163201] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 02/19/2022] [Accepted: 03/02/2022] [Indexed: 06/14/2023]
Abstract
Optical precision spectroscopy of isotope shifts can be used to test for new forces beyond the standard model, and to determine basic properties of atomic nuclei. We measure isotope shifts on the highly forbidden ^{2}S_{1/2}→^{2}F_{7/2} octupole transition of trapped ^{168,170,172,174,176}Yb ions. When combined with previous measurements in Yb^{+} and very recent measurements in Yb, the data reveal a King plot nonlinearity of up to 240σ. The trends exhibited by experimental data are explained by nuclear density functional theory calculations with the Fayans functional. We also find, with 4.3σ confidence, that there is a second distinct source of nonlinearity, and discuss its possible origin.
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Affiliation(s)
- Joonseok Hur
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Diana P L Aude Craik
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Ian Counts
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Eugene Knyazev
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Luke Caldwell
- JILA, NIST and University of Colorado, Boulder, Colorado 80309, USA
| | - Calvin Leung
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Swadha Pandey
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | - Julian C Berengut
- School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Amy Geddes
- School of Physics, University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Witold Nazarewicz
- Facility for Rare Isotope Beams and Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | | | - Akio Kawasaki
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan
| | - Honggi Jeon
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - Wonho Jhe
- Department of Physics and Astronomy, Seoul National University, Seoul 151-747, Korea
| | - Vladan Vuletić
- Department of Physics and Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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4
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Geldhof S, Kortelainen M, Beliuskina O, Campbell P, Caceres L, Cañete L, Cheal B, Chrysalidis K, Devlin CS, de Groote RP, de Roubin A, Eronen T, Ge Z, Gins W, Koszorus A, Kujanpää S, Nesterenko D, Ortiz-Cortes A, Pohjalainen I, Moore ID, Raggio A, Reponen M, Romero J, Sommer F. Impact of Nuclear Deformation and Pairing on the Charge Radii of Palladium Isotopes. PHYSICAL REVIEW LETTERS 2022; 128:152501. [PMID: 35499902 DOI: 10.1103/physrevlett.128.152501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/01/2022] [Accepted: 03/10/2022] [Indexed: 06/14/2023]
Abstract
The impact of nuclear deformation can been seen in the systematics of nuclear charge radii, with radii generally expanding with increasing deformation. In this Letter, we present a detailed analysis of the precise relationship between nuclear quadrupole deformation and the nuclear size. Our approach combines the first measurements of the changes in the mean-square charge radii of well-deformed palladium isotopes between A=98 and A=118 with nuclear density functional calculations using Fayans functionals, specifically Fy(std) and Fy(Δr,HFB), and the UNEDF2 functional. The changes in mean-square charge radii are extracted from collinear laser spectroscopy measurements on the 4d^{9}5s ^{3}D_{3}→4d^{9}5p ^{3}P_{2} atomic transition. The analysis of the Fayans functional calculations reveals a clear link between a good reproduction of the charge radii for the neutron-rich Pd isotopes and the overestimated odd-even staggering: Both aspects can be attributed to the strength of the pairing correlations in the particular functional which we employ.
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Affiliation(s)
- S Geldhof
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
- KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
| | - M Kortelainen
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - O Beliuskina
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - P Campbell
- Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom
| | - L Caceres
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, 14000 Caen, France
| | - L Cañete
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - B Cheal
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | | | - C S Devlin
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - R P de Groote
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - A de Roubin
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - T Eronen
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - Z Ge
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - W Gins
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - A Koszorus
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - S Kujanpää
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - D Nesterenko
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - A Ortiz-Cortes
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM-CNRS/IN2P3, 14000 Caen, France
| | - I Pohjalainen
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - I D Moore
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - A Raggio
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - M Reponen
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
| | - J Romero
- Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40014 Jyväskylä, Finland
- Department of Physics, University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - F Sommer
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
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5
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Malbrunot-Ettenauer S, Kaufmann S, Bacca S, Barbieri C, Billowes J, Bissell ML, Blaum K, Cheal B, Duguet T, Ruiz RFG, Gins W, Gorges C, Hagen G, Heylen H, Holt JD, Jansen GR, Kanellakopoulos A, Kortelainen M, Miyagi T, Navrátil P, Nazarewicz W, Neugart R, Neyens G, Nörtershäuser W, Novario SJ, Papenbrock T, Ratajczyk T, Reinhard PG, Rodríguez LV, Sánchez R, Sailer S, Schwenk A, Simonis J, Somà V, Stroberg SR, Wehner L, Wraith C, Xie L, Xu ZY, Yang XF, Yordanov DT. Nuclear Charge Radii of the Nickel Isotopes ^{58-68,70}Ni. PHYSICAL REVIEW LETTERS 2022; 128:022502. [PMID: 35089728 DOI: 10.1103/physrevlett.128.022502] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 10/05/2021] [Accepted: 10/22/2021] [Indexed: 06/14/2023]
Abstract
Collinear laser spectroscopy is performed on the nickel isotopes ^{58-68,70}Ni, using a time-resolved photon counting system. From the measured isotope shifts, nuclear charge radii R_{c} are extracted and compared to theoretical results. Three ab initio approaches all employ, among others, the chiral interaction NNLO_{sat}, which allows an assessment of their accuracy. We find agreement with experiment in differential radii δ⟨r_{c}^{2}⟩ for all employed ab initio methods and interactions, while the absolute radii are consistent with data only for NNLO_{sat}. Within nuclear density functional theory, the Skyrme functional SV-min matches experiment more closely than the Fayans functional Fy(Δr,HFB).
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Affiliation(s)
| | - S Kaufmann
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - S Bacca
- Institut für Kernphysik and PRISMA+ Cluster of Excellence, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany
- Helmholtz-Institut Mainz, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - C Barbieri
- Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, 20133 Milano, Italy
- INFN, Sezione di Milano, Via Celoria 16, 20133 Milano, Italy
| | - J Billowes
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - M L Bissell
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - K Blaum
- Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
| | - B Cheal
- Oliver Lodge Laboratory, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United Kingdom
| | - T Duguet
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - R F Garcia Ruiz
- Experimental Physics Department, CERN, CH-1211 Geneva 23, Switzerland
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - W Gins
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - C Gorges
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - G Hagen
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - H Heylen
- Experimental Physics Department, CERN, CH-1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
| | - J D Holt
- TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, McGill University, Montréal, Quebec H3A 2T8, Canada
| | - G R Jansen
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- National Center for Computational Sciences, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - A Kanellakopoulos
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - M Kortelainen
- Department of Physics, University of Jyväskylä, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, Finland
| | - T Miyagi
- TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - P Navrátil
- TRIUMF 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - W Nazarewicz
- Department of Physics and Astronomy and FRIB Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - R Neugart
- Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany
| | - G Neyens
- Experimental Physics Department, CERN, CH-1211 Geneva 23, Switzerland
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - W Nörtershäuser
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - S J Novario
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - T Papenbrock
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - T Ratajczyk
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - P-G Reinhard
- Institut für Theoretische Physik II, Universität Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - L V Rodríguez
- Experimental Physics Department, CERN, CH-1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay, France
| | - R Sánchez
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - S Sailer
- Technische Universität München, D-80333 München, Germany
| | - A Schwenk
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- Max-Planck-Institut für Kernphysik, D-69117 Heidelberg, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - J Simonis
- Institut für Kernphysik and PRISMA+ Cluster of Excellence, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany
| | - V Somà
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - S R Stroberg
- Department of Physics, University of Washington, Seattle, Washington, D.C. 98195, USA
| | - L Wehner
- Institut für Kernchemie, Johannes Gutenberg-Universität Mainz, D-55128 Mainz, Germany
| | - C Wraith
- Oliver Lodge Laboratory, University of Liverpool, Oxford Street, Liverpool L69 7ZE, United Kingdom
| | - L Xie
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - Z Y Xu
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - X F Yang
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
| | - D T Yordanov
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay, France
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6
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Barzakh A, Andreyev AN, Raison C, Cubiss JG, Van Duppen P, Péru S, Hilaire S, Goriely S, Andel B, Antalic S, Al Monthery M, Berengut JC, Bieroń J, Bissell ML, Borschevsky A, Chrysalidis K, Cocolios TE, Day Goodacre T, Dognon JP, Elantkowska M, Eliav E, Farooq-Smith GJ, Fedorov DV, Fedosseev VN, Gaffney LP, Garcia Ruiz RF, Godefroid M, Granados C, Harding RD, Heinke R, Huyse M, Karls J, Larmonier P, Li JG, Lynch KM, Maison DE, Marsh BA, Molkanov P, Mosat P, Oleynichenko AV, Panteleev V, Pyykkö P, Reitsma ML, Rezynkina K, Rossel RE, Rothe S, Ruczkowski J, Schiffmann S, Seiffert C, Seliverstov MD, Sels S, Skripnikov LV, Stryjczyk M, Studer D, Verlinde M, Wilman S, Zaitsevskii AV. Large Shape Staggering in Neutron-Deficient Bi Isotopes. PHYSICAL REVIEW LETTERS 2021; 127:192501. [PMID: 34797155 DOI: 10.1103/physrevlett.127.192501] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/01/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
The changes in the mean-square charge radius (relative to ^{209}Bi), magnetic dipole, and electric quadrupole moments of ^{187,188,189,191}Bi were measured using the in-source resonance-ionization spectroscopy technique at ISOLDE (CERN). A large staggering in radii was found in ^{187,188,189}Bi^{g}, manifested by a sharp radius increase for the ground state of ^{188}Bi relative to the neighboring ^{187,189}Bi^{g}. A large isomer shift was also observed for ^{188}Bi^{m}. Both effects happen at the same neutron number, N=105, where the shape staggering and a similar isomer shift were observed in the mercury isotopes. Experimental results are reproduced by mean-field calculations where the ground or isomeric states were identified by the blocked quasiparticle configuration compatible with the observed spin, parity, and magnetic moment.
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Affiliation(s)
- A Barzakh
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
| | - A N Andreyev
- Department of Physics, University of York, York YO10 5DD, United Kingdom
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai-mura, Ibaraki 319-1195, Japan
| | - C Raison
- Department of Physics, University of York, York YO10 5DD, United Kingdom
| | - J G Cubiss
- Department of Physics, University of York, York YO10 5DD, United Kingdom
| | - P Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - S Péru
- Université Paris-Saclay, CEA, LMCE, 91680 Bruyères-le-Châtel, France
| | - S Hilaire
- Université Paris-Saclay, CEA, LMCE, 91680 Bruyères-le-Châtel, France
| | - S Goriely
- Institut d'Astronomie et d'Astrophysique, CP-226, Université Libre de Bruxelles, 1050 Brussels, Belgium
| | - B Andel
- Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia
| | - S Antalic
- Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia
| | - M Al Monthery
- Department of Physics, University of York, York YO10 5DD, United Kingdom
| | - J C Berengut
- School of Physics, University of New South Wales, Sydney NSW 2052, Australia
| | - J Bieroń
- Instytut Fizyki Teoretycznej, Uniwersytet Jagielloński, ul. prof. Stanisława Łojasiewicza 11, Kraków, Poland
| | - M L Bissell
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - A Borschevsky
- Van Swinderen Institute, University of Groningen, 9747 Groningen, Netherlands
| | - K Chrysalidis
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
- Institut für Physik, Johannes Gutenberg-Universität, Mainz, D-55128 Mainz, Germany
| | - T E Cocolios
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - T Day Goodacre
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
- TRIUMF, 4004 Wesbrook Mall, Vancouver British Columbia V6T 2A3, Canada
| | - J-P Dognon
- NIMBE, CEA, CNRS, Universiteé Paris-Saclay, CEA Saclay, 91190 Gif-sur-Yvette, France
| | - M Elantkowska
- Poznan University of Technology, Piotrowo 3, Poznan 60-965, Poland
| | - E Eliav
- School of Chemistry, Tel Aviv University, 69978 Tel Aviv, Israel
| | - G J Farooq-Smith
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - D V Fedorov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
| | - V N Fedosseev
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - L P Gaffney
- School of Engineering and Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
| | - R F Garcia Ruiz
- School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - M Godefroid
- SQUARES, CP160/09, Université libre de Bruxelles, Av. F.D. Roosevelt 50, 1050 Brussels, Belgium
| | - C Granados
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - R D Harding
- Department of Physics, University of York, York YO10 5DD, United Kingdom
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - R Heinke
- Institut für Physik, Johannes Gutenberg-Universität, Mainz, D-55128 Mainz, Germany
| | - M Huyse
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - J Karls
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
- Department of Physics, University of Gothenburg, SE-412 96 Gothenburg, Sweden
| | - P Larmonier
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - J G Li
- Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
| | - K M Lynch
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - D E Maison
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
- Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
| | - B A Marsh
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - P Molkanov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
| | - P Mosat
- Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia
| | - A V Oleynichenko
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1/3, Moscow, 119991 Russia
| | - V Panteleev
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
| | - P Pyykkö
- Department of Chemistry, University of Helsinki, P.O. Box 55 (A. I. Virtasen aukio 1), FIN-00014 Helsinki, Finland
| | - M L Reitsma
- Van Swinderen Institute, University of Groningen, 9747 Groningen, Netherlands
| | - K Rezynkina
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - R E Rossel
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - S Rothe
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - J Ruczkowski
- Poznan University of Technology, Piotrowo 3, Poznan 60-965, Poland
| | - S Schiffmann
- SQUARES, CP160/09, Université libre de Bruxelles, Av. F.D. Roosevelt 50, 1050 Brussels, Belgium
| | - C Seiffert
- CERN, Esplanade des Particules 1, 1211 Geneva 23, Switzerland
| | - M D Seliverstov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
| | - S Sels
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - L V Skripnikov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
- Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034 Russia
| | - M Stryjczyk
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- University of Jyväskylä, Department of Physics, P.O. Box 35, FI-40014 Jyväskylä, Finland
| | - D Studer
- Institut für Physik, Johannes Gutenberg-Universität, Mainz, D-55128 Mainz, Germany
| | - M Verlinde
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - S Wilman
- Poznan University of Technology, Piotrowo 3, Poznan 60-965, Poland
| | - A V Zaitsevskii
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, 188300 Gatchina, Russia
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie gory 1/3, Moscow, 119991 Russia
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7
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Evidence of a sudden increase in the nuclear size of proton-rich silver-96. Nat Commun 2021; 12:4596. [PMID: 34321487 PMCID: PMC8319127 DOI: 10.1038/s41467-021-24888-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 07/12/2021] [Indexed: 11/09/2022] Open
Abstract
Understanding the evolution of the nuclear charge radius is one of the long-standing challenges for nuclear theory. Recently, density functional theory calculations utilizing Fayans functionals have successfully reproduced the charge radii of a variety of exotic isotopes. However, difficulties in the isotope production have hindered testing these models in the immediate region of the nuclear chart below the heaviest self-conjugate doubly-magic nucleus 100Sn, where the near-equal number of protons (Z) and neutrons (N) lead to enhanced neutron-proton pairing. Here, we present an optical excursion into this region by crossing the N = 50 magic neutron number in the silver isotopic chain with the measurement of the charge radius of 96Ag (N = 49). The results provide a challenge for nuclear theory: calculations are unable to reproduce the pronounced discontinuity in the charge radii as one moves below N = 50. The technical advancements in this work open the N = Z region below 100Sn for further optical studies, which will lead to more comprehensive input for nuclear theory development.
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8
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Day Goodacre T, Afanasjev AV, Barzakh AE, Marsh BA, Sels S, Ring P, Nakada H, Andreyev AN, Van Duppen P, Althubiti NA, Andel B, Atanasov D, Billowes J, Blaum K, Cocolios TE, Cubiss JG, Farooq-Smith GJ, Fedorov DV, Fedosseev VN, Flanagan KT, Gaffney LP, Ghys L, Huyse M, Kreim S, Lunney D, Lynch KM, Manea V, Martinez Palenzuela Y, Molkanov PL, Rosenbusch M, Rossel RE, Rothe S, Schweikhard L, Seliverstov MD, Spagnoletti P, Van Beveren C, Veinhard M, Verstraelen E, Welker A, Wendt K, Wienholtz F, Wolf RN, Zadvornaya A, Zuber K. Laser Spectroscopy of Neutron-Rich ^{207,208}Hg Isotopes: Illuminating the Kink and Odd-Even Staggering in Charge Radii across the N=126 Shell Closure. PHYSICAL REVIEW LETTERS 2021; 126:032502. [PMID: 33543945 DOI: 10.1103/physrevlett.126.032502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 11/17/2020] [Accepted: 12/15/2020] [Indexed: 06/12/2023]
Abstract
The mean-square charge radii of ^{207,208}Hg (Z=80, N=127, 128) have been studied for the first time and those of ^{202,203,206}Hg (N=122, 123, 126) remeasured by the application of in-source resonance-ionization laser spectroscopy at ISOLDE (CERN). The characteristic kink in the charge radii at the N=126 neutron shell closure has been revealed, providing the first information on its behavior below the Z=82 proton shell closure. A theoretical analysis has been performed within relativistic Hartree-Bogoliubov and nonrelativistic Hartree-Fock-Bogoliubov approaches, considering both the new mercury results and existing lead data. Contrary to previous interpretations, it is demonstrated that both the kink at N=126 and the odd-even staggering (OES) in its vicinity can be described predominately at the mean-field level and that pairing does not need to play a crucial role in their origin. A new OES mechanism is suggested, related to the staggering in the occupation of the different neutron orbitals in odd- and even-A nuclei, facilitated by particle-vibration coupling for odd-A nuclei.
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Affiliation(s)
- T Day Goodacre
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- CERN, CH-1211 Geneva 23, Switzerland
- TRIUMF, Vancouver V6T 2A3, Canada
| | - A V Afanasjev
- Department of Physics and Astronomy, Mississippi State University, Mississippi 39762, USA
| | - A E Barzakh
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | - B A Marsh
- CERN, CH-1211 Geneva 23, Switzerland
| | - S Sels
- CERN, CH-1211 Geneva 23, Switzerland
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - P Ring
- Fakultät für Physik, Technische Universität München, D-85748 Garching, Germany
| | - H Nakada
- Department of Physics, Graduate School of Science, Chiba University, Yayoi-cho, I-33, Inage, Chiba 263-8522, Japan
| | - A N Andreyev
- Department of Physics, University of York, York YO10 5DD, United Kingdom
- Advanced Science Research Center (ASRC), Japan Atomic Energy Agency (JAEA), Tokai-mura, Japan
| | - P Van Duppen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - N A Althubiti
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- Physics Department, Faculty of Science, Jouf University, Aljouf P.O. Box 2014, Saudi Arabia
| | - B Andel
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- Department of Nuclear Physics and Biophysics, Comenius University in Bratislava, 84248 Bratislava, Slovakia
| | - D Atanasov
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - J Billowes
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
| | - K Blaum
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T E Cocolios
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - J G Cubiss
- Department of Physics, University of York, York YO10 5DD, United Kingdom
| | - G J Farooq-Smith
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - D V Fedorov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | | | - K T Flanagan
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- The Photon Science Institute, The University of Manchester, Manchester M13 9PL, United Kingdom
| | - L P Gaffney
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
| | - L Ghys
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- Belgian Nuclear Research Center SCK CEN, Boeretang 200, B-2400 Mol, Belgium
| | - M Huyse
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - S Kreim
- CERN, CH-1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - D Lunney
- CSNSM-IN2P3, Université de Paris Sud, 91405 Orsay, France
| | - K M Lynch
- The University of Manchester, School of Physics and Astronomy, Oxford Road, Manchester M13 9PL, United Kingdom
- CERN, CH-1211 Geneva 23, Switzerland
| | - V Manea
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - Y Martinez Palenzuela
- CERN, CH-1211 Geneva 23, Switzerland
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - P L Molkanov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | - M Rosenbusch
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - R E Rossel
- CERN, CH-1211 Geneva 23, Switzerland
- Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
| | - S Rothe
- CERN, CH-1211 Geneva 23, Switzerland
| | - L Schweikhard
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - M D Seliverstov
- Petersburg Nuclear Physics Institute, NRC Kurchatov Institute, Gatchina 188300, Russia
| | - P Spagnoletti
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
| | - C Van Beveren
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | | | - E Verstraelen
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - A Welker
- CERN, CH-1211 Geneva 23, Switzerland
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
| | - K Wendt
- Institut für Physik, Johannes Gutenberg-Universität, D-55099 Mainz, Germany
| | - F Wienholtz
- CERN, CH-1211 Geneva 23, Switzerland
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - R N Wolf
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
- Universität Greifswald, Institut für Physik, 17487 Greifswald, Germany
| | - A Zadvornaya
- KU Leuven, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
| | - K Zuber
- Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden 01069, Germany
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9
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Tanaka M, Takechi M, Homma A, Fukuda M, Nishimura D, Suzuki T, Tanaka Y, Moriguchi T, Ahn DS, Aimaganbetov A, Amano M, Arakawa H, Bagchi S, Behr KH, Burtebayev N, Chikaato K, Du H, Ebata S, Fujii T, Fukuda N, Geissel H, Hori T, Horiuchi W, Hoshino S, Igosawa R, Ikeda A, Inabe N, Inomata K, Itahashi K, Izumikawa T, Kamioka D, Kanda N, Kato I, Kenzhina I, Korkulu Z, Kuk Y, Kusaka K, Matsuta K, Mihara M, Miyata E, Nagae D, Nakamura S, Nassurlla M, Nishimuro K, Nishizuka K, Ohnishi K, Ohtake M, Ohtsubo T, Omika S, Ong HJ, Ozawa A, Prochazka A, Sakurai H, Scheidenberger C, Shimizu Y, Sugihara T, Sumikama T, Suzuki H, Suzuki S, Takeda H, Tanaka YK, Tanihata I, Wada T, Wakayama K, Yagi S, Yamaguchi T, Yanagihara R, Yanagisawa Y, Yoshida K, Zholdybayev TK. Swelling of Doubly Magic ^{48}Ca Core in Ca Isotopes beyond N=28. PHYSICAL REVIEW LETTERS 2020; 124:102501. [PMID: 32216444 DOI: 10.1103/physrevlett.124.102501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 12/20/2019] [Accepted: 01/30/2020] [Indexed: 06/10/2023]
Abstract
Interaction cross sections for ^{42-51}Ca on a carbon target at 280 MeV/nucleon have been measured for the first time. The neutron number dependence of derived root-mean-square matter radii shows a significant increase beyond the neutron magic number N=28. Furthermore, this enhancement of matter radii is much larger than that of the previously measured charge radii, indicating a novel growth in neutron skin thickness. A simple examination based on the Fermi-type distribution, and mean field calculations point out that this anomalous enhancement of the nuclear size beyond N=28 results from an enlargement of the core by a sudden increase in the surface diffuseness of the neutron density distribution, which implies the swelling of the bare ^{48}Ca core in Ca isotopes beyond N=28.
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Affiliation(s)
- M Tanaka
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
- Research Center for Superheavy Elements, Kyushu University, Fukuoka 819-0395, Japan
| | - M Takechi
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - A Homma
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - M Fukuda
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - D Nishimura
- Department of Physics, Tokyo City University, Setagaya, Tokyo 158-8557, Japan
| | - T Suzuki
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - Y Tanaka
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Moriguchi
- Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - D S Ahn
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - A Aimaganbetov
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
- L.N. Gumilyov Eurasian National University, 010008 Astana, Kazakhstan
| | - M Amano
- Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - H Arakawa
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - S Bagchi
- Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia B3H 3C3, Canada
- Justus Liebig University, 35392 Giessen, Germany
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - K-H Behr
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - N Burtebayev
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
| | - K Chikaato
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - H Du
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S Ebata
- Department of Physics, Saitama University, Saitama 338-8570, Japan
- School of Environment and Society, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
| | - T Fujii
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - N Fukuda
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - T Hori
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - W Horiuchi
- Department of Physics, Hokkaido University, Sapporo 060-0810, Japan
| | - S Hoshino
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - R Igosawa
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - A Ikeda
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - N Inabe
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - K Inomata
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - K Itahashi
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - T Izumikawa
- Institute for Research Promotion, Niigata University, Niigata 950-8510, Japan
| | - D Kamioka
- Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - N Kanda
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - I Kato
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - I Kenzhina
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
- Al-Farabi Kazakh National University, 050040 Almaty, Kazakhstan
| | - Z Korkulu
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - Y Kuk
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
- L.N. Gumilyov Eurasian National University, 010008 Astana, Kazakhstan
| | - K Kusaka
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - K Matsuta
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Mihara
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - E Miyata
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - D Nagae
- Research Center for Superheavy Elements, Kyushu University, Fukuoka 819-0395, Japan
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - S Nakamura
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Nassurlla
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
- Al-Farabi Kazakh National University, 050040 Almaty, Kazakhstan
| | - K Nishimuro
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - K Nishizuka
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - K Ohnishi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Ohtake
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - T Ohtsubo
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - S Omika
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - H J Ong
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - A Ozawa
- Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - A Prochazka
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - H Sakurai
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- Department of Physics, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - C Scheidenberger
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - Y Shimizu
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - T Sugihara
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Sumikama
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - H Suzuki
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - S Suzuki
- Institute of Physics, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - H Takeda
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - Y K Tanaka
- GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany
| | - I Tanihata
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- School of Physics and Nuclear Energy Engineering, Beihang University, 100191 Beijing, China
| | - T Wada
- Department of Physics, Niigata University, Ikarashi, Niigata 951-2181, Japan
| | - K Wakayama
- Department of Physics, Saitama University, Saitama 338-8570, Japan
| | - S Yagi
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - T Yamaguchi
- Department of Physics, Saitama University, Saitama 338-8570, Japan
- Tomonaga Center for the History of the Universe, University of Tsukuba, Ibaraki 305-8571, Japan
| | - R Yanagihara
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - Y Yanagisawa
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - K Yoshida
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
| | - T K Zholdybayev
- Institute of Nuclear Physics, 050032 Almaty, Kazakhstan
- Al-Farabi Kazakh National University, 050040 Almaty, Kazakhstan
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10
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Manea V, Karthein J, Atanasov D, Bender M, Blaum K, Cocolios TE, Eliseev S, Herlert A, Holt JD, Huang WJ, Litvinov YA, Lunney D, Menéndez J, Mougeot M, Neidherr D, Schweikhard L, Schwenk A, Simonis J, Welker A, Wienholtz F, Zuber K. First Glimpse of the N=82 Shell Closure below Z=50 from Masses of Neutron-Rich Cadmium Isotopes and Isomers. PHYSICAL REVIEW LETTERS 2020; 124:092502. [PMID: 32202869 DOI: 10.1103/physrevlett.124.092502] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Accepted: 01/07/2020] [Indexed: 06/10/2023]
Abstract
We probe the N=82 nuclear shell closure by mass measurements of neutron-rich cadmium isotopes with the ISOLTRAP spectrometer at ISOLDE-CERN. The new mass of ^{132}Cd offers the first value of the N=82, two-neutron shell gap below Z=50 and confirms the phenomenon of mutually enhanced magicity at ^{132}Sn. Using the recently implemented phase-imaging ion-cyclotron-resonance method, the ordering of the low-lying isomers in ^{129}Cd and their energies are determined. The new experimental findings are used to test large-scale shell-model, mean-field, and beyond-mean-field calculations, as well as the ab initio valence-space in-medium similarity renormalization group.
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Affiliation(s)
- V Manea
- CERN, 1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- Instituut voor Kern-en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
| | - J Karthein
- CERN, 1211 Geneva 23, Switzerland
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - D Atanasov
- Technische Universität Dresden, 01069 Dresden, Germany
| | - M Bender
- IP2I Lyon, CNRS/IN2P3, Université de Lyon, Université Claude Bernard Lyon 1, F-69622 Villeurbanne, France
| | - K Blaum
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | - T E Cocolios
- Instituut voor Kern-en Stralingsfysica, Katholieke Universiteit Leuven, B-3001 Leuven, Belgium
| | - S Eliseev
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
| | | | - J D Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
| | - W J Huang
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - D Lunney
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France
| | - J Menéndez
- Center for Nuclear Study, The University of Tokyo, 113-0033 Tokyo, Japan
- Department de Física Quàntica i Astrofísica, Universitat de Barcelona, 08028 Barcelona, Spain
| | - M Mougeot
- CSNSM-IN2P3-CNRS, Université Paris-Sud, 91406 Orsay, France
| | - D Neidherr
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - L Schweikhard
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - A Schwenk
- Max-Planck-Institut für Kernphysik, 69117 Heidelberg, Germany
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - J Simonis
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
- Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, 55099 Mainz, Germany
| | - A Welker
- CERN, 1211 Geneva 23, Switzerland
- Technische Universität Dresden, 01069 Dresden, Germany
| | - F Wienholtz
- CERN, 1211 Geneva 23, Switzerland
- Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany
| | - K Zuber
- Technische Universität Dresden, 01069 Dresden, Germany
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11
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Gray TJ, Allmond JM, Stuchbery AE, Yu CH, Baktash C, Gargano A, Galindo-Uribarri A, Radford DC, Batchelder JC, Beene JR, Bingham CR, Coraggio L, Covello A, Danchev M, Gross CJ, Hausladen PA, Itaco N, Krolas W, Liang JF, Padilla-Rodal E, Pavan J, Stracener DW, Varner RL. Early Signal of Emerging Nuclear Collectivity in Neutron-Rich ^{129}Sb. PHYSICAL REVIEW LETTERS 2020; 124:032502. [PMID: 32031845 DOI: 10.1103/physrevlett.124.032502] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 11/05/2019] [Indexed: 06/10/2023]
Abstract
Radioactive ^{129}Sb, which can be treated as a proton plus semimagic ^{128}Sn core within the particle-core coupling scheme, was studied by Coulomb excitation. Reduced electric quadrupole transition probabilities, B(E2), for the 2^{+}⊗πg_{7/2} multiplet members and candidate πd_{5/2} state were measured. The results indicate that the total electric quadrupole strength of ^{129}Sb is a factor of 1.39(11) larger than the ^{128}Sn core, which is in stark contrast to the expectations of the empirically successful particle-core coupling scheme. Shell-model calculations performed with two different sets of nucleon-nucleon interactions suggest that this enhanced collectivity is due to constructive quadrupole coherence in the wave functions stemming from the proton-neutron residual interactions, where adding one nucleon to a core near a double-shell closure can have a pronounced effect. The enhanced electric quadrupole strength is an early signal of the emerging nuclear collectivity that becomes dominant away from the shell closure.
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Affiliation(s)
- T J Gray
- Department of Nuclear Physics, Australian National University, Canberra ACT 2601, Australia
| | - J M Allmond
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - A E Stuchbery
- Department of Nuclear Physics, Australian National University, Canberra ACT 2601, Australia
| | - C-H Yu
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - C Baktash
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - A Gargano
- Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
| | - A Galindo-Uribarri
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - D C Radford
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - J C Batchelder
- Department of Nuclear Engineering, University of California, Berkeley, Berkeley, California 94720, USA
| | - J R Beene
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - C R Bingham
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - L Coraggio
- Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
| | - A Covello
- Dipartimento di Fisica "Ettore Pancini", Università di Napoli Federico II, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
| | - M Danchev
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
- Faculty of Physics, St. Kliment Ohridski University of Sofia, 1164 Sofia, Bulgaria
| | - C J Gross
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - P A Hausladen
- Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - N Itaco
- Istituto Nazionale di Fisica Nucleare, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy
- Dipartimento di Matematica e Fisica, Università degli Studi della Campania "Luigi Vanvitelli", Viale Abramo Lincoln 5, I-81100 Caserta, Italy
| | - W Krolas
- Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Institute of Nuclear Physics, Polish Academy of Sciences (IFJ PAN), PL-31342 Kraków, Poland
| | - J F Liang
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - E Padilla-Rodal
- Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
- Instituto de Ciencias Nucleares, UNAM, AP 70-543, 04510 Mexico City, Mexico
| | - J Pavan
- Joint Institute for Heavy Ion Research, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - D W Stracener
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - R L Varner
- Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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