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New high-spin states of 147Nd and 145Ce: Octupole correlation in the N = 87 isotones

  • Ts. Venkova
  • M. -G. PorquetEmail author
  • A. Astier
  • I. Deloncle
  • P. Petkov
  • A. Prévost
  • F. Azaiez
  • A. Bogachev
  • A. Buta
  • D. Curien
  • O. Dorvaux
  • G. Duchêne
  • J. Durell
  • B. J. P. Gall
  • M. Houry
  • F. Khalfallah
  • R. Lucas
  • M. Meyer
  • I. Piqueras
  • N. Redon
  • A. Roach
  • M. Rousseau
  • O. Stézowski
  • Ch. Theisen
Original Article

Abstract.

High-spin states of the N = 87 nuclei, 147Nd and 145Ce, have been populated in the 12C + 238U and 18O + 208Pb fusion-fission reactions at 90 MeV and 85 MeV bombarding energy, respectively. The emitted γ-radiation was detected using the Euroball III and IV arrays. High-spin states of the 147Nd isotope have been identified for the first time. The high-spin yrast and near-to-yrast structures of the 145Ce nucleus have been considerably extended. The newly observed structures, discussed by analogy with the neighbouring isotones, show the coupling of an h9/2 neutron to the quadrupole and octupole excitations of the core.

PACS.

21.10.-k Properties of nuclei; nuclear energy levels 21.10.Re Collective levels 23.20.Lv γ transitions and level energies 27.60.+j 90 ⩽ A ⩽ 149 

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Copyright information

© Società Italiana di Fisica and Springer-Verlag 2005

Authors and Affiliations

  • Ts. Venkova
    • 1
    • 2
  • M. -G. Porquet
    • 1
    Email author
  • A. Astier
    • 1
  • I. Deloncle
    • 1
  • P. Petkov
    • 1
    • 2
  • A. Prévost
    • 1
  • F. Azaiez
    • 3
  • A. Bogachev
    • 4
  • A. Buta
    • 3
  • D. Curien
    • 3
  • O. Dorvaux
    • 3
  • G. Duchêne
    • 3
  • J. Durell
    • 5
  • B. J. P. Gall
    • 3
  • M. Houry
    • 6
  • F. Khalfallah
    • 3
  • R. Lucas
    • 6
  • M. Meyer
    • 7
  • I. Piqueras
    • 3
  • N. Redon
    • 7
  • A. Roach
    • 5
  • M. Rousseau
    • 3
  • O. Stézowski
    • 7
  • Ch. Theisen
    • 6
  1. 1.CSNSMIN2P3-CNRS/Université Paris-SudOrsayFrance
  2. 2.Institute of Nuclear Research and Nuclear EnergyBulgarian Academy of SciencesSofiaBulgaria
  3. 3.IReSIN2P3-CNRS/Université Louis PasteurStrasbourg Cedex 2France
  4. 4.JINRDubnaRussia
  5. 5.Department of Physics and AstronomyUniversity of ManchesterManchesterUK
  6. 6.Commissariat à l'Énergie AtomiqueCEA/DSM/DAPNIA/SPhNGif-sur-Yvette CedexFrance
  7. 7.IPNLIN2P3-CNRS/Université Claude BernardVilleurbanne CedexFrance

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