Physics Letters B (Apr 2022)
A first glimpse at the shell structure beyond 54Ca: Spectroscopy of 55K, 55Ca, and 57Ca
- T. Koiwai,
- K. Wimmer,
- P. Doornenbal,
- A. Obertelli,
- C. Barbieri,
- T. Duguet,
- J.D. Holt,
- T. Miyagi,
- P. Navrátil,
- K. Ogata,
- N. Shimizu,
- V. Somà,
- Y. Utsuno,
- K. Yoshida,
- N.L. 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,
- H.N. Liu,
- T. Motobayashi,
- I. Murray,
- H. Otsu,
- V. Panin,
- N. Paul,
- W. Rodriguez,
- H. Sakurai,
- M. Sasano,
- D. Steppenbeck,
- L. Stuhl,
- Y.L. Sun,
- Y. Togano,
- T. Uesaka,
- K. Yoneda,
- O. Aktas,
- T. Aumann,
- L.X. Chung,
- F. Flavigny,
- S. Franchoo,
- I. Gasparic,
- R.-B. Gerst,
- J. Gibelin,
- K.I. Hahn,
- D. Kim,
- 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,
- P.-A. Söderström,
- D. Sohler,
- S. Takeuchi,
- H. Toernqvist,
- V. Vaquero,
- V. Wagner,
- S. Wang,
- V. Werner,
- X. Xu,
- H. Yamada,
- D. Yan,
- Z. Yang,
- M. Yasuda,
- L. Zanetti
Affiliations
- T. Koiwai
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- K. Wimmer
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain; GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, D-64291 Darmstadt, Germany; Corresponding author at: GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, D-64291 Darmstadt, Germany.
- P. Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- 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
- C. Barbieri
- Dipartimento di Fisica, Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy; INFN, Sezione di Milano, Via Celoria 16, I-20133 Milano, Italy; Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
- T. Duguet
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; KU Leuven, Department of Physics and Astronomy, Instituut voor Kern- en Stralingsfysica, B-3001 Leuven, Belgium
- J.D. Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada; Department of Physics, McGill University, Montréal, QC H3A 2T8, Canada
- T. Miyagi
- TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
- P. Navrátil
- TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada
- K. Ogata
- Research Center for Nuclear Physics (RCNP), Osaka University, Ibaraki 567-0047, Japan; Department of Physics, Osaka City University, Osaka 558-8585, Japan; Nambu Yoichiro Institute of Theoretical and Experimental Physics (NITEP), Osaka City University, Osaka 558-8585, Japan
- N. Shimizu
- Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
- V. Somà
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- Y. Utsuno
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan; Center for Nuclear Study, University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
- K. Yoshida
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
- N.L. Achouri
- LPC Caen, Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, 14000 Caen, 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, China; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- 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
- H.N. Liu
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
- T. Motobayashi
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- I. Murray
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France; 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; Laboratoire Kastler Brossel, Sorbonne Université, CNRS, ENS-PSL Research University, Collège de France, Case 74; 4, place Jussieu, F-75005 Paris, France
- W. Rodriguez
- Universidad Nacional de Colombia, Carr. 30 No. 45-03, Bogotá, 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
- 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.L. Sun
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
- 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. 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
- L.X. Chung
- Institute for Nuclear Science & Technology, VINATOM, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Viet Nam
- F. Flavigny
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France; LPC Caen, Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, 14000 Caen, France
- S. Franchoo
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, France
- I. Gasparic
- Ruđer Bošković Institute, Bijenička cesta 54, 10000 Zagreb, Croatia; Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany; 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, Normandie Univ, ENSICAEN, UNICAEN, CNRS/IN2P3, 14000 Caen, France
- K.I. Hahn
- Ewha Womans University, Seoul 120-750, South Korea; Institute for Basic Science, Daejeon 34126, South Korea
- D. Kim
- Ewha Womans University, Seoul 120-750, South Korea; Institute for Basic Science, Daejeon 34126, South Korea
- 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 Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, D-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, 179 Hoang Quoc Viet, Cau Giay, Hanoi, Viet Nam
- T. Lokotko
- Department of Physics, The University of Hong Kong, Pokfulam, Hong Kong
- M. MacCormick
- Université Paris-Saclay, CNRS/IN2P3, IJCLab, 91405 Orsay, 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
- Ewha Womans University, Seoul 120-750, South Korea; Institute for Basic Science, Daejeon 34126, South Korea
- D. Rossi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, D-64291 Darmstadt, Germany
- E. Sahin
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
- P.-A. Söderström
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
- D. Sohler
- Institute for Nuclear Research, Atomki, P.O. Box 51, Debrecen H-4001, Hungary
- S. Takeuchi
- Department of Physics, Tokyo Institute of Technology, 2-12-1 O-Okayama, Meguro, Tokyo, 152-8551, Japan
- H. Toernqvist
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 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, 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, 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
-
Vol. 827
p. 136953
Abstract
States in the N=35 and 37 isotopes 55,57Ca have been populated by direct proton-induced nucleon removal reactions from 56,58Sc and 56Ca beams at the RIBF. In addition, the (p,2p) quasi-free single-proton removal reaction from 56Ca was studied. Excited states in 55K, 55Ca, and 57Ca were established for the first time via in-beam γ-ray spectroscopy. Results for the proton and neutron removal reactions from 56Ca to states in 55K and 55Ca for the level energies, excited state lifetimes, and exclusive cross sections agree well with state-of-the-art theoretical calculations using different approaches. The observation of a short-lived state in 57Ca suggests a transition in the calcium isotopic chain from single-particle dominated states at N=35 to collective excitations at N=37.
