Physics Letters B (Mar 2020)
Restoration of the natural E(1/21+) - E(3/21+) energy splitting in odd-K isotopes towards N = 40
- Y.L. Sun,
- A. Obertelli,
- P. Doornenbal,
- C. Barbieri,
- Y. Chazono,
- T. Duguet,
- H.N. Liu,
- P. Navrátil,
- F. Nowacki,
- K. Ogata,
- T. Otsuka,
- F. Raimondi,
- V. Somà,
- Y. Utsuno,
- K. Yoshida,
- N. Achouri,
- H. Baba,
- F. Browne,
- D. Calvet,
- F. Château,
- S. Chen,
- N. Chiga,
- A. Corsi,
- M.L. Cortés,
- A. Delbart,
- J.-M. Gheller,
- A. Giganon,
- A. Gillibert,
- C. Hilaire,
- T. Isobe,
- T. Kobayashi,
- Y. Kubota,
- V. Lapoux,
- T. Motobayashi,
- I. Murray,
- H. Otsu,
- V. Panin,
- N. Paul,
- W. Rodriguez,
- H. Sakurai,
- M. Sasano,
- D. Steppenbeck,
- L. Stuhl,
- Y. Togano,
- T. Uesaka,
- K. Wimmer,
- K. Yoneda,
- O. Aktas,
- T. Aumann,
- L.X. Chung,
- F. Flavigny,
- S. Franchoo,
- I. Gašparić,
- R.-B. Gerst,
- J. Gibelin,
- K.I. Hahn,
- D. Kim,
- T. Koiwai,
- Y. Kondo,
- P. Koseoglou,
- J. Lee,
- C. Lehr,
- B.D. Linh,
- T. Lokotko,
- M. MacCormick,
- K. Moschner,
- T. Nakamura,
- S.Y. Park,
- D. Rossi,
- E. Sahin,
- D. Sohler,
- P.-A. Söderström,
- S. Takeuchi,
- H. Törnqvist,
- V. Vaquero,
- V. Wagner,
- S. Wang,
- V. Werner,
- X. Xu,
- H. Yamada,
- D. Yan,
- Z. Yang,
- M. Yasuda,
- L. Zanetti
Affiliations
- Y.L. Sun
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; Corresponding author at: Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.
- A. Obertelli
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- P. Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- C. Barbieri
- Department of Physics, University of Surrey, Guildford GU2 7XH, UK
- Y. Chazono
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan
- T. Duguet
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; KU Leuven, Instituut voor Kern- en Stralingsfysica, 3001 Leuven, Belgium
- H.N. Liu
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
- P. Navrátil
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- F. Nowacki
- Université de Strasbourg, IPHC, 67037 Strasbourg Cedex, France; CNRS, UMR7178, 67037 Strasbourg, France
- K. Ogata
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan; Department of Physics, Osaka City University, Osaka 558-8585, Japan
- T. Otsuka
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan; Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
- F. Raimondi
- Department of Physics, University of Surrey, Guildford GU2 7XH, UK; ESNT, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- V. Somà
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- Y. Utsuno
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
- K. Yoshida
- Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
- N. Achouri
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
- H. Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- F. Browne
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- D. Calvet
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- F. Château
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- S. Chen
- State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, PR China; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
- N. Chiga
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- A. Corsi
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- M.L. Cortés
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- A. Delbart
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- J.-M. Gheller
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- A. Giganon
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- A. Gillibert
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- C. Hilaire
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- T. Isobe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- T. Kobayashi
- Department of Physics, Tohoku University, Sendai 980-8578, Japan
- Y. Kubota
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
- V. Lapoux
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- T. Motobayashi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- I. Murray
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- H. Otsu
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- V. Panin
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- N. Paul
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- W. Rodriguez
- Universidad Nacional de Colombia, Sede Bogota, Facultad de Ciencias, Departamento de Física, Bogotá 111321, Colombia; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- H. Sakurai
- 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
- M. Sasano
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- D. Steppenbeck
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- L. Stuhl
- Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
- Y. Togano
- Department of Physics, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima, Tokyo 172-8501, Japan
- T. Uesaka
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- K. Wimmer
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- K. Yoneda
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- O. Aktas
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
- T. Aumann
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; GSI Helmoltzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt, Germany
- L.X. Chung
- Institute for Nuclear Science & Technology, VINATOM, P.O. Box 5T-160, Nghia Do, Hanoi, Viet Nam
- F. Flavigny
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
- S. Franchoo
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
- I. Gašparić
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- R.-B. Gerst
- Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany
- J. Gibelin
- LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F-14050 Caen, France
- K.I. Hahn
- Department of Science Education and Department of Physics, Ewha Womans University, Seoul 03760, Republic of Korea
- D. Kim
- Department of Science Education and Department of Physics, Ewha Womans University, Seoul 03760, Republic of Korea; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- T. Koiwai
- Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-0033, Japan
- Y. Kondo
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan
- P. Koseoglou
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; GSI Helmoltzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt, Germany
- J. Lee
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
- C. Lehr
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- B.D. Linh
- Institute for Nuclear Science & Technology, VINATOM, P.O. Box 5T-160, Nghia Do, Hanoi, Viet Nam
- T. Lokotko
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
- M. MacCormick
- Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, 91406 Orsay Cedex, France
- K. Moschner
- Institut für Kernphysik, Universität zu Köln, D-50937 Cologne, Germany
- T. Nakamura
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan
- S.Y. Park
- Department of Science Education and Department of Physics, Ewha Womans University, Seoul 03760, Republic of Korea; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- D. Rossi
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- E. Sahin
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
- D. Sohler
- MTA Atomki, P.O. Box 51, Debrecen H-4001, Hungary
- P.-A. Söderström
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- S. Takeuchi
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan
- H. Törnqvist
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; GSI Helmoltzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt, Germany
- V. Vaquero
- Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
- V. Wagner
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- S. Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, PR China
- V. Werner
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- X. Xu
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
- H. Yamada
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan
- D. Yan
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, PR China
- Z. Yang
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- M. Yasuda
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan
- L. Zanetti
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- Journal volume & issue
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Vol. 802
Abstract
We report on the first γ-ray spectroscopy of 51,53K produced via the 52,54Ca(p,2p) reactions at ∼250 MeV/nucleon. Unambiguous final-state angular-momentum assignments were achieved for beam intensities down to few particles per second by using a new technique based on reaction vertex tracking combined with a thick liquid-hydrogen target. Through γ-ray spectroscopy and exclusive parallel momentum distribution analysis, 3/2+ ground states and 1/2+ first excited states in 51,53K were established quantifying the natural ordering of the 1d3/2 and 2s1/2 proton-hole states that are restored at N = 32 and 34. State-of-the-art ab initio calculations and shell-model calculations with improved phenomenological effective interactions reproduce the present data and predict consistently the increase of the E(1/21+) - E(3/21+) energy differences towards N = 40. Keywords: Spectroscopy, Shell evolution, 51K, 53K
