Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of ^{110}Zr.
The first measurement of the low-lying states of the neutron-rich ^{110}Zr and ^{112}Mo was performed via in-beam γ-ray spectroscopy after one proton removal on hydrogen at ∼200  MeV/nucleon. The 2_{1}^{+} excitation energies were found at 185(11) keV in ^{110}Zr, and 235(7) keV in ^{112}Mo, while the R_{42}=E(4_{1}^{+})/E(2_{1}^{+}) ratios are 3.1(2), close to the rigid rotor value, and 2.7(1), respectively. These results are compared to modern energy density functional based configuration mixing models using Gogny and Skyrme effective interactions. We conclude that first levels of ^{110}Zr exhibit a rotational behavior, in agreement with previous observations of lighter zirconium isotopes as well as with the most advanced Monte Carlo shell model predictions. The data, therefore, do not support a harmonic oscillator shell stabilization scenario at Z=40 and N=70. The present data also invalidate predictions for a tetrahedral ground state symmetry in ^{110}Zr.
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.|RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Paul
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
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Corsi
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.|RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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A
Obertelli
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Doornenbal
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
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Authelet
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Baba
ESNT, IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
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B
Bally
IPNL, Université de Lyon, Université Lyon 1, CNRS/IN2P3, F-69622 Villeurbanne, France.
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Bender
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
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Calvet
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
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Château
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China.
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Chen
CEA, DAM, DIF, F-91297 Arpajon, France.
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JP
Delaroche
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
A
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Delbart
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
J-M
JM
Gheller
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
A
A
Giganon
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
A
A
Gillibert
CEA, DAM, DIF, F-91297 Arpajon, France.
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M
Girod
PNTPM, CP229, Université Libre de Bruxelles, B-1050 Bruxelles, Belgium.
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PH
Heenen
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
V
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Lapoux
CEA, DAM, DIF, F-91297 Arpajon, France.
J
J
Libert
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Motobayashi
Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Niikura
Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Otsuka
Departamento de Física Teorica, Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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Rodríguez
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
J-Y
JY
Roussé
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Sakurai
IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France.
C
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Santamaria
Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Shimizu
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Steppenbeck
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Taniuchi
Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Togashi
Center for Nuclear Study, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Tsunoda
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Uesaka
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Ando
GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.|Justus-Liebig-Universität Giessen, D-35392 Giessen, Germany.
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Arici
Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany.
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Blazhev
School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
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Browne
School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
A M
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Bruce
Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
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Carroll
Institute for Nuclear Science and Technology, VAEI, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
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Chung
GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.|Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
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Cortés
Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany.
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Dewald
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
B
B
Ding
Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France.
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F
Flavigny
Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France.
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Franchoo
GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.
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Górska
Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France.
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Gottardo
Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain.
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A
Jungclaus
Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
J
J
Lee
Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
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Lettmann
Institute for Nuclear Science and Technology, VAEI, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Vietnam.
B D
BD
Linh
Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
J
J
Liu
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China.
Z
Z
Liu
GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany.|Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
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Lizarazo
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.|Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Momiyama
Institut für Kernphysik, Universität zu Köln, 50937 Köln, Germany.
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Moschner
Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Nagamine
Department of Physics, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan.
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Nakatsuka
Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), RO-077125 Bucharest, Romania.
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Nita
School of Computing Engineering and Mathematics, University of Brighton, Brighton BN2 4GJ, United Kingdom.
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Nobs
Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France.
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Olivier
Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
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Patel
Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
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Podolyák
Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
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Rudigier
Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
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Saito
Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom.
C
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Shand
RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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Söderström
Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France.
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Stefan
Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki, 319-1195, Japan.
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Orlandi
Instituto de Estructura de la Materia, CSIC, 28006 Madrid, Spain.
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Vaquero
Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany.
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Werner
Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan.
K
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Wimmer
Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong.
Z
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Xu