Physics Letters B (May 2019)
First spectroscopy of 61Ti and the transition to the Island of Inversion at N = 40
- K. Wimmer,
- F. Recchia,
- S.M. Lenzi,
- S. Riccetto,
- T. Davinson,
- A. Estrade,
- C.J. Griffin,
- S. Nishimura,
- F. Nowacki,
- V. Phong,
- A. Poves,
- P.-A. Söderström,
- O. Aktas,
- M. Al-Aqeel,
- T. Ando,
- H. Baba,
- S. Bae,
- S. Choi,
- P. Doornenbal,
- J. Ha,
- L. Harkness-Brennan,
- T. Isobe,
- P.R. John,
- D. Kahl,
- G. Kiss,
- I. Kojouharov,
- N. Kurz,
- M. Labiche,
- K. Matsui,
- S. Momiyama,
- D.R. Napoli,
- M. Niikura,
- C. Nita,
- Y. Saito,
- H. Sakurai,
- H. Schaffner,
- P. Schrock,
- C. Stahl,
- T. Sumikama,
- V. Werner,
- W. Witt,
- P.J. Woods
Affiliations
- 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; Corresponding author.
- F. Recchia
- Dipartimento di Fisica e Astronomia dell' Università di Padova, Padova I-35131, Italy; INFN, Sezione di Padova, Padova I-35131, Italy
- S.M. Lenzi
- Dipartimento di Fisica e Astronomia dell' Università di Padova, Padova I-35131, Italy; INFN, Sezione di Padova, Padova I-35131, Italy
- S. Riccetto
- Dipartimento di Fisica e Geologia dell' Università di Perugia, Perugia, Italy; INFN, Sezione di Perugia, Perugia, Italy
- T. Davinson
- School of Physics and Astronomy, The University of Edinburgh, James Clerk Maxwell Building, Edinburgh EH9 3FD, United Kingdom
- A. Estrade
- Central Michigan University, USA
- C.J. Griffin
- School of Physics and Astronomy, The University of Edinburgh, James Clerk Maxwell Building, Edinburgh EH9 3FD, United Kingdom
- S. Nishimura
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- F. Nowacki
- IPHC, IN2P3-CNRS et Université de Strasbourg, F-67037 Strasbourg, France
- V. Phong
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Faculty of Physics, VNU University of Science, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam
- A. Poves
- Department of Theoretical Physics and IFT UAM-CSIC Universidad Autónoma de Madrid, 28049, Madrid, Spain
- P.-A. Söderström
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- O. Aktas
- KTH Royal Institute of Technology, Stockholm, Sweden
- M. Al-Aqeel
- Department of Physics, University of Liverpool, Oliver Lodge Building, Oxford Street, L697ZE, Liverpool, United Kingdom; Department of Physics, College of Science, Al-Imam Mohammad Ibn Saud Islamic University (IMISU), Riyadh, 11623, Saudi Arabia
- T. Ando
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- H. Baba
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- S. Bae
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea; Institute for Nuclear and Particle Astrophysics, Seoul National University, Seoul, 08826, Republic of Korea
- S. Choi
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea; Institute for Nuclear and Particle Astrophysics, Seoul National University, Seoul, 08826, Republic of Korea
- P. Doornenbal
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- J. Ha
- Department of Physics and Astronomy, Seoul National University, Seoul, 08826, Republic of Korea; RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- L. Harkness-Brennan
- Department of Physics, University of Liverpool, Oliver Lodge Building, Oxford Street, L697ZE, Liverpool, United Kingdom
- T. Isobe
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- P.R. John
- Dipartimento di Fisica e Astronomia dell' Università di Padova, Padova I-35131, Italy; INFN, Sezione di Padova, Padova I-35131, Italy
- D. Kahl
- School of Physics and Astronomy, The University of Edinburgh, James Clerk Maxwell Building, Edinburgh EH9 3FD, United Kingdom
- G. Kiss
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan; Institute for Nuclear Research (MTA ATOMKI), H-4001 Debrecen, POB.51, Hungary
- I. Kojouharov
- GSI Helmholtzzentum für Schwerionenforschung GmbH, Darmstadt, Germany
- N. Kurz
- GSI Helmholtzzentum für Schwerionenforschung GmbH, Darmstadt, Germany
- M. Labiche
- STFC Daresbury Laboratory, United Kingdom
- K. Matsui
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- S. Momiyama
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- D.R. Napoli
- INFN, Laboratori Nazionali di Legnaro, Legnaro (Padova), Italy
- M. Niikura
- Department of Physics, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- C. Nita
- Horia Hulubei National Institute for Physics and Nuclear Engineering (IFIN-HH), Bucharest, Romania
- Y. Saito
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- H. Sakurai
- 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
- H. Schaffner
- GSI Helmholtzzentum für Schwerionenforschung GmbH, Darmstadt, Germany
- P. Schrock
- Center for Nuclear Study, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
- C. Stahl
- Institut für Kernphysik, Technische Universität Darmstadt, Germany
- T. Sumikama
- RIKEN Nishina Center, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- V. Werner
- Institut für Kernphysik, Technische Universität Darmstadt, Germany
- W. Witt
- Institut für Kernphysik, Technische Universität Darmstadt, Germany; GSI Helmholtzzentum für Schwerionenforschung GmbH, Darmstadt, Germany
- P.J. Woods
- School of Physics and Astronomy, The University of Edinburgh, James Clerk Maxwell Building, Edinburgh EH9 3FD, United Kingdom
- Journal volume & issue
-
Vol. 792
pp. 16 – 20
Abstract
Isomeric states in 59,61Ti have been populated in the projectile fragmentation of a 345 AMeV 238U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed γ-ray transitions were measured with the EURICA array. Besides the known isomeric state in 59Ti, two isomeric states in 61Ti are observed for the first time. Based on the measured lifetimes, transition multipolarities as well as tentative spins and parities are assigned. Large-scale shell model calculations based on the modified LNPS interaction show that both 59Ti and 61Ti belong to the Island of Inversion at N=40 with ground state configurations dominated by particle-hole excitations to the g9/2 and d5/2 orbits. Keywords: Radioactive beams, Gamma-ray spectroscopy, Isomeric decay, Shell evolution, Island of Inversion
