First candidates for γ vibrational bands built on the [505]11/2− neutron orbital in odd- A Dy isotopes
| Autor: | J. Simpson, J. N. Orce, Catherine Scholey, Sanna Stolze, T. Lauritsen, A. Korichi, L. Makhathini, P. Ruotsalainen, O. Shirinda, I. Stefanescu, F. G. Kondev, J. F. Sharpey-Schafer, C. W. Beausang, D. G. Roux, N. Cooper, R. A. Bark, J. Hirvonen, Paul Greenlees, D. Miller, L. Mdletshe, B. J. P. Gall, V. Werner, E. A. McCutchan, S. N. T. Majola, E. A. Lawrie, X. Wang, Pauli Peura, J. L. Wood, S. Miller, J. Ndayishimye, C. J. Chiara, S. P. Bvumbi, Juha Sorri, Juha Uusitalo, D. Hartley, L. L. Riedinger, N. Redon, L. Bianco, Jan Sarén, S. H. Mthembu, M. A. Riley, L. Msebi, S. S. Ntshangase, Ulrika Jakobsson, B. Maqabuka, T. S. Dinoko, W. D. Kulp, J. M. Allmond, M. P. Carpenter, Peter B. Jones, G. Zimba, B. M. Nyakó, Rauno Julin, József Tímár, S. Zhu, B. V. Kheswa, Paivi Nieminen, T. D. Bucher, M. A. Sithole, P. Z. Ngcobo, Panu Rahkila, Sakari Juutinen, D. Curien, A. Minkova, D. M. Cullen, J. Piot, Steffen Ketelhut, C. H. Yu, P. L. Masiteng, P. E. Garrett |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Physical Review C. 101 |
| ISSN: | 2469-9993 2469-9985 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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