Collective excitations in the transitional nuclei Re-163 and Re-165

T.R. Davis-Merry, D.T. Joss, R.D. Page, J. Simpson, E.S. Paul, F.A. Ali, L. Bianco, R.J. Carroll, B. Cederwall, I.G. Darby, M.C. Drummond, S. Eeckhaudt, S. Ertürk, M.B. Gómez-Hornillos, T. Grahn, P.T. Greenlees, B. Hadinia, U. Jakobsson, P.M. Jones, R. JulinS. Juutinen, S. Ketelhut, M. Leino, P. Nieminen, M. Nyman, D. O'Donnell, J. Pakarinen, P. Peura, P. Rahkila, J.P. Revill, P. Ruotsalainen, M. Sandzelius, P.J. Sapple, J. Sarén, B. Sayği, C. Scholey, J. Sorri, J. Thomson, J. Uusitalo

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3 Citations (Scopus)

Abstract

Excited states in the neutron-deficient nuclei (163)(75) Re-88 and (165)(75) Re-90 were populated in the Cd-106(Ni-60, p2n gamma) and Mo-92(Kr-78, 3p2n gamma) fusion-evaporation reactions at bombarding energies of 270 and 380 MeV, respectively.. rays were detected at the target position using the JUROGAM spectrometer while recoiling ions were separated in-flight by the RITU gas-filled recoil separator and implanted in the GREAT spectrometer. The energy level schemes for Re-163 and Re-165 were identified using recoil-decay correlation techniques. At low spin, the yrast bands of these isotopes consist of signature partner bands based on a single pi h(11/2) quasiproton configuration. The bands display large energy splitting consistent with the soft triaxial shape typical of transitional nuclei above N = 82. The configurations of the excited states are proposed within the framework of the cranked shell model.
Original languageEnglish
Article number034319
JournalPhysical Review C
Volume91
Issue number3
DOIs
Publication statusPublished - 2015
Externally publishedYes

Keywords

  • total data readout
  • proton emission
  • drip-line
  • bands
  • decay
  • spectroscopy
  • isotopes
  • shape
  • radioactivity
  • deformations

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