Physics Letters B (Jan 2020)
Shell evolution of N = 40 isotones towards 60Ca: First spectroscopy of 62Ti
- M.L. Cortés,
- W. Rodriguez,
- P. Doornenbal,
- A. Obertelli,
- J.D. Holt,
- S.M. Lenzi,
- J. Menéndez,
- F. Nowacki,
- K. Ogata,
- A. Poves,
- T.R. Rodríguez,
- A. Schwenk,
- J. Simonis,
- S.R. Stroberg,
- K. Yoshida,
- L. Achouri,
- H. Baba,
- F. Browne,
- D. Calvet,
- F. Château,
- S. Chen,
- N. Chiga,
- A. Corsi,
- 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,
- H. Sakurai,
- M. Sasano,
- D. Steppenbeck,
- L. Stuhl,
- Y.L. Sun,
- 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. Toernqvist,
- V. Vaquero,
- V. Wagner,
- S. Wang,
- V. Werner,
- X. Xu,
- H. Yamada,
- D. Yan,
- Z. Yang,
- M. Yasuda,
- L. Zanetti
Affiliations
- M.L. Cortés
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy; Corresponding author at: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, I-35020 Legnaro, Italy.
- 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
- P. Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- A. Obertelli
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- J.D. Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver BC V6T 2A3, Canada
- S.M. Lenzi
- Dipartimento di Fisica e Astronomia, Università di Padova and INFN, Sezione di Padova, Via F. Marzolo 8, I-35131 Padova, Italy
- J. Menéndez
- Center for Nuclear Study, The University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
- F. Nowacki
- IPHC, CNRS/IN2P3, Université de Strasbourg, F-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
- A. Poves
- Departamento de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-2804 Madrid, Spain
- T.R. Rodríguez
- Departamento de Física Teórica and IFT-UAM/CSIC, Universidad Autónoma de Madrid, E-2804 Madrid, Spain
- A. Schwenk
- Institut für Kernphysik, 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
- J. Simonis
- Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, Mainz 55099, Germany
- S.R. Stroberg
- TRIUMF, 4004 Wesbrook Mall, Vancouver BC V6T 2A3, Canada; Department of Physics, University of Washington, Seattle WA, USA
- K. Yoshida
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
- L. Achouri
- LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3, F-14050 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, PR 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
- 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, The 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; Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany; 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
- IPN Orsay, CNRS and Université Paris Saclay, F-91406 Orsay Cedex, 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
- 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, The University of Tokyo, RIKEN campus, Wako, Saitama 351-0198, Japan
- Y.L. Sun
- IRFU, CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France; Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- 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, 64289 Darmstadt, Germany; GSI Helmholtzzentrum 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
- IPN Orsay, CNRS and Université Paris Saclay, F-91406 Orsay Cedex, France
- S. Franchoo
- IPN Orsay, CNRS and Université Paris Saclay, F-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
- 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, 64289 Darmstadt, Germany; GSI Helmholtzzentrum 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, 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
- IPN Orsay, CNRS and Université Paris Saclay, F-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
- D. Rossi
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- E. Sahin
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
- D. Sohler
- Institute for Nuclear Research of the Hungarian Academy of Sciences (MTA Atomki), P.O. Box 51, Debrecen H-4001, Hungary
- P.-A. Söderström
- Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- 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, 64289 Darmstadt, Germany; GSI Helmholtzzentrum 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, 64289 Darmstadt, Germany
- S. Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, PR China
- V. Werner
- Institut für Kernphysik, Technische Universität Darmstadt, 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, 64289 Darmstadt, Germany
- Journal volume & issue
-
Vol. 800
Abstract
Excited states in the N=40 isotone 62Ti were populated via the 63V(p,2p)62Ti reaction at ∼200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using γ-ray spectroscopy. The energies of the 21+→0gs+ and 41+→21+ transitions, observed here for the first time, indicate a deformed 62Ti ground state. These energies are increased compared to the neighboring 64Cr and 66Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for 62Ti show a dominant configuration with four neutrons excited across the N=40 gap. Likewise, they indicate that the N=40 island of inversion extends down to Z=20, disfavoring a possible doubly magic character of the elusive 60Ca. Keywords: Shell evolution, Radioactive beams, Gamma-ray spectroscopy
