Shape coexistence at the proton drip-line: first identification of excited states in Pb-180

P. Rahkila, D. G. Jenkins, J. Pakarinen, C. Gray-Jones, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, H. Koivisto, M. Leino, P. Nieminen, M. Nyman, P. Papadakis, S. Paschalis, M. Petri, P. Peura, O. J. Roberts, T. RopponenP. Ruotsalainen, J. Saren, C. Scholey, J. Sorri, A. G. Tuff, J. Uusitalo, R. Wadsworth, M. Bender, P. -H. Heenen

Research output: Contribution to journalArticlepeer-review

Abstract

Excited states in the extremely neutron-deficient nucleus Pb-180 have been identified for the first time using the JUROGAM II array in conjunction with the RITU recoil separator at the Accelerator Laboratory of the University of Jyvaskyla. This study lies at the limit of what is presently achievable with in-beam spectroscopy, with an estimated cross section of only 10 nb for the Mo-92(Zr-90,2n)Pb-180 reaction. A continuation of the trend observed in Pb-182 and Pb-184 is seen, where the prolate minimum continues to rise beyond the N = 104 midshell with respect to the spherical ground state. Beyond-mean-field calculations are in reasonable correspondence with the trends deduced from experiment.

Original languageEnglish
Article number011303
Pages (from-to)1-5
Number of pages5
JournalPhysical Review C
Volume82
Issue number1
DOIs
Publication statusPublished - 26 Jul 2010

Keywords

  • NUCLEAR-DATA SHEETS
  • TOTAL DATA READOUT
  • BEAM GAMMA-RAY
  • INTRUDER STATES
  • SPECTROSCOPY
  • DETECTORS
  • FUSION
  • GE

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