Discovery of a new isomeric state in Ni-68: Evidence for a highly deformed proton intruder state

Dijon A., Clément E., de France G., de Angelis G., Duchene G., Dudouet J., ...More

PHYSICAL REVIEW C, vol.85, no.3, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 85 Issue: 3
  • Publication Date: 2012
  • Doi Number: 10.1103/physrevc.85.031301
  • Journal Name: PHYSICAL REVIEW C
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Istanbul University Affiliated: Yes


We report on the observation of a new isomeric state in Ni-68. We suggest that the newly observed state at 168(1) keV above the first 2(+) state is a pi(2p-2h) 0(+) state across the major Z = 28 shell gap. Comparison with theoretical calculations indicates a pure proton intruder configuration and the deduced low-lying structure of this key nucleus suggests a possible shape coexistence scenario involving a highly deformed state.