Shape Coexistence at Zero Spin in ^{64}Ni Driven by the Monopole Tensor Interaction

N Mărginean¹, D Little^{2

3}, Y Tsunoda⁴, S Leoni^{5

6}, R V F Janssens^{2

3}, B Fornal⁷, T Otsuka^{8

9

10}, C Michelagnoli¹¹, L Stan¹, F C L Crespi^{5

6}, C Costache¹, R Lica¹, M Sferrazza¹², A Turturica¹, A D Ayangeakaa¹³, K Auranen¹⁴, M Barani^{5

6

11}, P C Bender¹⁵, S Bottoni^{5

6}, M Boromiza¹, A Bracco^{5

6}, S Călinescu¹, C M Campbell¹⁶, M P Carpenter¹⁴, P Chowdhury¹⁵, M Ciemała⁷, N Cieplicka-Oryǹczak⁷, D Cline¹⁷, C Clisu¹, H L Crawford¹⁶, I E Dinescu¹, J Dudouet¹⁸, D Filipescu¹, N Florea¹, A M Forney¹⁹, S Fracassetti^{5

6}, A Gade^{20

21}, I Gheorghe¹, A B Hayes²², I Harca¹, J Henderson²³, A Ionescu¹, Ł W Iskra⁶, M Jentschel¹¹, F Kandzia¹¹, Y H Kim¹¹, F G Kondev¹⁴, G Korschinek²⁴, U Köster¹¹, Krishichayan³, M Krzysiek⁷, T Lauritsen¹⁴, J Li¹⁴, R Mărginean¹, E A Maugeri²⁵, C Mihai¹, R E Mihai¹, A Mitu¹, P Mutti¹¹, A Negret¹, C R Niţă¹, A Olăcel¹, A Oprea¹, S Pascu¹, C Petrone¹, C Porzio^{5

6}, D Rhodes^{20

21}, D Seweryniak¹⁴, D Schumann²⁵, C Sotty¹, S M Stolze¹⁴, R Şuvăilă¹, S Toma¹, S Ujeniuc¹, W B Walters¹⁹, C Y Wu²³, J Wu¹⁴, S Zhu²², S Ziliani^{5

6}

Affiliations

¹ Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania.
² Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3255, USA.
³ Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708-2308, USA.
⁴ Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
⁵ Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy.
⁶ INFN sezione di Milano via Celoria 16, 20133 Milano, Italy.
⁷ Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland.
⁸ Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
⁹ RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
¹⁰ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3000 Leuven, Belgium.
¹¹ Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France.
¹² Département de Physique, Université libre de Bruxelles, B-1050 Bruxelles, Belgium.
¹³ Department of Physics, United States Naval Academy, Annapolis, Maryland 21402, USA.
¹⁴ Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
¹⁵ Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
¹⁶ Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
¹⁷ Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.
¹⁸ Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France.
¹⁹ Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA.
²⁰ Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
²¹ National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
²² National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
²³ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
²⁴ Technische Universität München, 80333 München, Germany.
²⁵ Paul Scherrer Institut, 5232 Villigen, Switzerland.

PMID: 32955302
DOI: 10.1103/PhysRevLett.125.102502

Free article

Shape Coexistence at Zero Spin in ^{64}Ni Driven by the Monopole Tensor Interaction

N Mărginean et al. Phys Rev Lett. 2020.

Free article

. 2020 Sep 4;125(10):102502.

doi: 10.1103/PhysRevLett.125.102502.

Authors

Affiliations

¹ Horia Hulubei National Institute of Physics and Nuclear Engineering-IFIN HH, Bucharest 077125, Romania.
² Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3255, USA.
³ Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708-2308, USA.
⁴ Center for Nuclear Study, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
⁵ Dipartimento di Fisica, Universitá degli Studi di Milano, I-20133 Milano, Italy.
⁶ INFN sezione di Milano via Celoria 16, 20133 Milano, Italy.
⁷ Institute of Nuclear Physics, PAN, 31-342 Kraków, Poland.
⁸ Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
⁹ RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
¹⁰ KU Leuven, Instituut voor Kern- en Stralingsfysica, 3000 Leuven, Belgium.
¹¹ Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France.
¹² Département de Physique, Université libre de Bruxelles, B-1050 Bruxelles, Belgium.
¹³ Department of Physics, United States Naval Academy, Annapolis, Maryland 21402, USA.
¹⁴ Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA.
¹⁵ Department of Physics and Applied Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA.
¹⁶ Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
¹⁷ Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA.
¹⁸ Université Lyon 1, CNRS/IN2P3, IPN-Lyon, F-69622, Villeurbanne, France.
¹⁹ Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA.
²⁰ Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA.
²¹ National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA.
²² National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York 11973-5000, USA.
²³ Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
²⁴ Technische Universität München, 80333 München, Germany.
²⁵ Paul Scherrer Institut, 5232 Villigen, Switzerland.

PMID: 32955302
DOI: 10.1103/PhysRevLett.125.102502

Abstract

The low-spin structure of the semimagic ^{64}Ni nucleus has been considerably expanded: combining four experiments, several 0^{+} and 2^{+} excited states were identified below 4.5 MeV, and their properties established. The Monte Carlo shell model accounts for the results and unveils an unexpectedly complex landscape of coexisting shapes: a prolate 0^{+} excitation is located at a surprisingly high energy (3463 keV), with a collective 2^{+} state 286 keV above it, the first such observation in Ni isotopes. The evolution in excitation energy of the prolate minimum across the neutron N=40 subshell gap highlights the impact of the monopole interaction and its variation in strength with N.

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Shape Coexistence at Zero Spin in ^{64}Ni Driven by the Monopole Tensor Interaction

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Shape Coexistence at Zero Spin in ^{64}Ni Driven by the Monopole Tensor Interaction

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Abstract

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