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European Physical Journal A 26 (2005) 315-319
New high-spin states of $^{147}$Nd and $^{145}$Ce: Octupole correlation in the N = 87 isotones
T. Venkova1, M.G. Porquet1, A. Astier1, I. Deloncle1, P. Petkov1, A. Prévost1, F. Azaiez2, A. Bogachev, A. Buta2, D. Curien2, O. Dorvaux2, G. Duchêne2, J. Durell, B.J.P. Gall2, M. Houry, F. Khalfallah2, R. Lucas, M. Meyer3, I. Piqueras2, N. Redon3, A. Roach, M. Rousseau2, O. Stezowski3, Ch. Theisen

High-spin states of the N = 87 nuclei, $^{147}$Nd and $^{145}$Ce, have been populated in the $^{12}$C + $^{238}$U and $^{18}$O + $^{208}$Pb 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 $^{147}$Nd isotope have been identified for the first time. The high-spin yrast and near-to-yrast structures of the $^{145}$Ce nucleus have been considerably extended. The newly observed structures, discussed by analogy with the neighbouring isotones, show the coupling of an h$_{9/2}$ neutron to the quadrupole and octupole excitations of the core
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
2 :  IReS - Institut de Recherches Subatomiques
3 :  IPNL - Institut de Physique Nucléaire de Lyon
Physique/Physique Nucléaire Expérimentale