First candidates for γvibrational bands built on the [505]11/2- neutron orbital in odd- A Dy isotopes

S. N.T. Majola, M. A. Sithole, L. Mdletshe, D. Hartley, J. Timár, B. M. Nyakó, J. M. Allmond, R. A. Bark, C. Beausang, L. Bianco, T. D. Bucher, S. P. Bvumbi, M. P. Carpenter, C. J. Chiara, N. Cooper, D. M. Cullen, D. Curien, T. S. Dinoko, B. J.P. Gall, P. E. GarrettP. T. Greenlees, J. Hirvonen, U. Jakobsson, P. M. Jones, R. Julin, S. Juutinen, S. Ketelhut, B. V. Kheswa, F. G. Kondev, A. Korichi, W. D. Kulp, T. Lauritsen, E. A. Lawrie, L. Makhathini, P. L. Masiteng, B. Maqabuka, E. A. McCutchan, D. Miller, S. Miller, A. Minkova, L. Msebi, S. H. Mthembu, J. Ndayishimye, P. Nieminen, P. Z. Ngcobo, S. S. Ntshangase, J. N. Orce, P. Peura, P. Rahkila, N. Redon, L. L. Riedinger, M. A. Riley, D. G. Roux, P. Ruotsalainen, J. Piot, J. Saren, J. F. Sharpey-Schafer, C. Scholey, O. Shirinda, J. Simpson, J. Sorri, I. Stefanescu, S. Stolze, J. Uusitalo, X. Wang, V. Werner, J. L. Wood, C. H. Yu, S. Zhu, G. Zimba

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4 Citations (Scopus)


Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the Gd155(α,2n)Dy157 and Nd148(C12,5n)Dy155 reactions at 25 and 65 MeV, respectively. We report high-K bands, which are conjectured to be the first candidates of a Kπ=2+γ vibrational band, built on the [505]11/2- neutron orbital, in both odd-ADy155,157 isotopes. The coupling of the first excited K=0+ states or the so-called β vibrational bands at 661 and 676 keV in Dy154 and Dy156 to the [505]11/2- orbital, to produce a Kπ=11/2- band, was not observed in both Dy155 and Dy157, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei Dy154 and Dy156 are also discussed.

Original languageEnglish
Article number044312
JournalPhysical Review C
Issue number4
Publication statusPublished - Apr 2020

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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