Spectroscopy of low-spin states in Dy 157: Search for evidence of enhanced octupole correlations

S. N.T. Majola, R. A. Bark, L. Bianco, T. D. Bucher, S. P. Bvumbi, D. M. Cullen, P. E. Garrett, P. T. Greenlees, D. Hartley, J. Hirvonen, U. Jakobsson, P. M. Jones, R. Julin, S. Juutinen, S. Ketelhut, B. V. Kheswa, A. Korichi, E. A. Lawrie, P. L. Masiteng, B. MaqabukaL. Mdletshe, A. Minkova, J. Ndayishimye, P. Nieminen, R. Newman, B. M. Nyakó, S. S. Ntshangase, P. Peura, P. Rahkila, L. L. Riedinger, M. Riley, D. Roux, P. Ruotsalainen, J. Saren, J. F. Sharpey-Schafer, C. Scholey, O. Shirinda, A. Sithole, J. Sorri, S. Stolze, J. Timár, J. Uusitalo, G. Zimba

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4 Citations (Scopus)


Low-spin states of Dy157 have been studied using the JUROGAM II array, following the Gd155 (α, 2n) reaction at a beam energy of 25 MeV. The level scheme of Dy157 has been expanded with four new bands. Rotational structures built on the [523]5/2- and [402]3/2+ neutron orbitals constitute new additions to the level scheme as do many of the inter- and intraband transitions. This manuscript also reports the observation of cross I+→(I-1)- and I-→(I-1)+ E1 dipole transitions interlinking structures built on the [523]5/2- (band 5) and [402]3/2+ (band 7) neutron orbitals. These interlacing band structures are interpreted as the bands of parity doublets with simplex quantum number s=-i related to possible octupole correlations.

Original languageEnglish
Article number034322
JournalPhysical Review C
Issue number3
Publication statusPublished - 23 Sept 2019

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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