在[505] 11/2-中子轨道上建立的γ振动带的第一批候选者

论文标题

在[505] 11/2-中子轨道上建立的γ振动带的第一批候选者

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

论文作者

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

论文摘要

在155GD（α，2N）157dy和148nd（12c，5n）155 y的155 dy反应分别在25和65 meV时，使用jurogam II和伽马球阵列测量了旋转结构。我们报告了高K频带，这些频段被认为是基于[505] 11/2-中子轨道的Kπ= 2+γ振动带的第一批候选物，在这两个奇数-A 155，157dy同位素中。第一个激发k = 0+状态的耦合或所谓的\ b {eta}振动带在661和154dy中的676 keV和676 keV和156dy to [505] 11/2-轨道，以产生kπ= 11/2-带，分别在155dy和157dy中都观察到kπ= 11/2-频段。还讨论了这些发现对核心核154dy和156dy中第一个激发0+状态的解释的含义。

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.

下载PDF全文

下载文献需遵守相关版权规定

论文标题