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arXiv 2005.04699nucl-exnucl-th
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Dy奇A同位素[505]11/2中子轨道上γ振动带的第一候选者

First candidates for γ vibrational 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. Timar, B. M. Nyako, J. M. Allmond, R. A. Bark, C. Beausang, L. Bianco, T. D. Bucher, S. P. Bvumbi, M… 展开作者

S. N. T. Majola, M. A. Sithole, L. Mdletshe, D. Hartley, J. Timar, B. M. Nyako, 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. Garrett, P. 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

摘要:

在25和65 MeV的155 Gd(α,2n)157 Dy和148 Nd(12 C,5 n)155 Dy反应后,分别用Jurogam II和Gammasphere阵列测量了低自旋下的转动结构。我们报道了奇A 155,157 Dy同位素的高K带,它们是建立在[505]11/2中子轨道上的Kπ= 2+ γ振动带的第一候选者。在154 Dy和156 Dy中,在661和676 keV处的第一激发K=0+态或所谓的\b{eta}振动带与[505]11/2轨道耦合,产生Kπ=11/2带,在155 Dy和157 Dy中分别没有观察到。本文还讨论了这些发现对解释154 Dy和156 Dy核第一激发0+态的意义。

英文摘要:

Rotational structures have been measured using the Jurogam II and GAMMASPHERE arrays at low spin following the 155Gd(α,2n)157Dy and 148Nd(12C, 5n)155Dy 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-A 155, 157Dy isotopes. The coupling of the first excited K=0+ states or the so-called \b{eta} vibrational bands at 661 and 676 keV in 154Dy and 156Dy to the [505]11/2- orbital, to produce a Kπ=11/2- band, was not observed in both 155Dy and 157Dy, respectively. The implication of these findings on the interpretation of the first excited 0+ states in the core nuclei 154Dy and 156Dy are also discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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