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Title: The role of core excitations in the structure and decay of the 16 + spin-gap isomer in 96Cd

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. Finally, the results highlight the importance of core-excited wavefunction components for the 16 + state.
Authors:
ORCiD logo [1] ;  [2] ;  [3] ;  [4] ;  [1] ;  [5] ;  [2] ;  [6] ;  [7] ;  [8] ;  [4] ;  [7] ;  [9] ;  [10] ;  [2] ;  [9] ;  [11] ;  [2] ;  [5] ;  [7] more »;  [1] ;  [11] ;  [4] ;  [2] ;  [2] ;  [12] ;  [7] ;  [9] ;  [5] ;  [13] ;  [6] ;  [11] ;  [7] ;  [14] ;  [5] ;  [2] ;  [7] ;  [11] ;  [9] ;  [15] ;  [16] ;  [4] ;  [4] ;  [7] ;  [17] ;  [7] ;  [7] ;  [11] « less
  1. Univ. of York, York (United Kingdom)
  2. GSI Helmholtzzentrum fur Schwerionenforschung, Darmstadt (Germany)
  3. Univ. zu Koln, Koln (Germany); RIKEN Nishina Center, Saitama (Japan)
  4. Univ. zu Koln, Koln (Germany)
  5. Technische Univ. Darmstadt, Darmstadt (Germany)
  6. Osaka Univ., Osaka (Japan)
  7. RIKEN Nishina Center, Saitama (Japan)
  8. Royal Inst. of Technology, Stockholm (Sweden)
  9. Technische Univ. Munchen, Garching (Germany)
  10. Uppsala Univ., Uppsala (Sweden)
  11. Univ. of Tokyo, Tokyo (Japan)
  12. Grand Accelerateur National d'Ions Lourds (GANIL), Carn Cedex (France)
  13. Yale Univ., New Haven, CT (United States)
  14. IN2p3-CNRS et Univ. Strasbourg, Strasbourg (France)
  15. Tohoku Univ., Miyagi (Japan)
  16. Instituto de Estructura de la Materia, Madrid (Spain)
  17. Technische Univ. Darmstadt, Darmstadt (Germany); Yale Univ., New Haven, CT (United States)
Publication Date:
Grant/Contract Number:
FG02-91ER40609
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 767; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Univ. of York, York (United Kingdom)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; β-decay; βp-decay; γ-ray spectroscopy; half-life; shell-model; WKB
OSTI Identifier:
1345842
Alternate Identifier(s):
OSTI ID: 1358380