Physics Letters B (Apr 2017)
The role of core excitations in the structure and decay of the 16+ spin-gap isomer in 96Cd
- P.J. Davies,
- H. Grawe,
- K. Moschner,
- A. Blazhev,
- R. Wadsworth,
- P. Boutachkov,
- F. Ameil,
- A. Yagi,
- H. Baba,
- T. Bäck,
- M. Dewald,
- P. Doornenbal,
- T. Faestermann,
- A. Gengelbach,
- J. Gerl,
- R. Gernhäeuser,
- S. Go,
- M. Górska,
- E. Gregor,
- T. Isobe,
- D.G. Jenkins,
- H. Hotaka,
- J. Jolie,
- I. Kojouharov,
- N. Kurz,
- M. Lewitowicz,
- G. Lorusso,
- L. Maier,
- E. Merchan,
- F. Naqvi,
- H. Nishibata,
- D. Nishimura,
- S. Nishimura,
- F. Nowacki,
- N. Pietralla,
- H. Schaffner,
- P.-A. Söderström,
- H.S. Jung,
- K. Steiger,
- T. Sumikama,
- J. Taprogge,
- P. Thöle,
- N. Warr,
- H. Watanabe,
- V. Werner,
- Z.Y. Xu,
- K. Yoshinaga,
- Y. Zhu
Affiliations
- P.J. Davies
- Department of Physics, University of York, York YO10 5DD, United Kingdom
- H. Grawe
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- K. Moschner
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
- A. Blazhev
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
- R. Wadsworth
- Department of Physics, University of York, York YO10 5DD, United Kingdom
- P. Boutachkov
- IKP, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- F. Ameil
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- A. Yagi
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- H. Baba
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- T. Bäck
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
- M. Dewald
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
- P. Doornenbal
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- T. Faestermann
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
- A. Gengelbach
- Department of Physics and Astronomy, Uppsala University, SE-75121 Uppsala, Sweden
- J. Gerl
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- R. Gernhäeuser
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
- S. Go
- Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
- M. Górska
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- E. Gregor
- IKP, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- T. Isobe
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- D.G. Jenkins
- Department of Physics, University of York, York YO10 5DD, United Kingdom
- H. Hotaka
- Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
- J. Jolie
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
- I. Kojouharov
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- N. Kurz
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- M. Lewitowicz
- Grand Accélérateur National d'Ions Lourds (GANIL), CEA/DSM – CNRS/IN2P3, F-14076 Caen Cedex 5, France
- G. Lorusso
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- L. Maier
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
- E. Merchan
- IKP, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- F. Naqvi
- Wright Nuclear Structure Laboratory, Yale University, New Haven, CT 06511, USA
- H. Nishibata
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
- D. Nishimura
- Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
- S. Nishimura
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- F. Nowacki
- IPHC, IN2p3-CNRS et Universited́e Strasbourg, F-67037 Strasbourg, France
- N. Pietralla
- IKP, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- H. Schaffner
- GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
- P.-A. Söderström
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- H.S. Jung
- Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
- K. Steiger
- Physik Department E12, Technische Universität München, D-85748 Garching, Germany
- T. Sumikama
- Department of Physics, Tohoku University, 6-3 Aramaki-Aoba, Aoba, Sendai, Miyagi 980-8578, Japan
- J. Taprogge
- Instituto de Estructura de la Materia, CSIC, E-28006 Madrid, Spain
- P. Thöle
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
- N. Warr
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
- H. Watanabe
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- V. Werner
- IKP, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- Z.Y. Xu
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- K. Yoshinaga
- RIKEN Nishina Center, Wako, Saitama 351-0198, Japan
- Y. Zhu
- Department of Physics, University of Tokyo, Bunkyo, Tokyo 113-0033, Japan
- DOI
- https://doi.org/10.1016/j.physletb.2017.02.013
- Journal volume & issue
-
Vol. 767,
no. C
pp. 474 – 479
Abstract
The first evidence for β-delayed proton emission from the 16+ spin gap isomer in 96Cd is presented. The data were obtained from the Rare Isotope Beam Factory, at the RIKEN Nishina Center, using the BigRIPS spectrometer and the EURICA decay station. βp branching ratios for the ground state and 16+ isomer have been extracted along with more precise lifetimes for these states and the lifetime for the ground state decay of 95Cd. Large scale shell model (LSSM) calculations have been performed and WKB estimates made for ℓ=0,2,4 proton emission from three resonance-like states in 96Ag, that are populated by the β decay of the isomer, and the results compared to the new data. The calculations suggest that ℓ=2 proton emission from the resonance states, which reside ∼5 MeV above the proton separation energy, dominates the proton decay. The results highlight the importance of core-excited wavefunction components for the 16+ state.
Keywords
