157Dy中低自旋状态的光谱：寻找增强的八杆相关性的证据

论文标题

157Dy中低自旋状态的光谱：寻找增强的八杆相关性的证据

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

论文作者

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

论文摘要

经过155GD（α，2N）反应在25 meV的束能量下，使用耶罗加姆II阵列研究了157Dy的低旋转状态。 157Dy的水平方案已通过四个新乐队扩展。旋转结构与[523] 5/2-和[402] 3/2+中子轨道构成了水平方案的新增加，就像许多频段和内部内部和内部内部的跃迁一样。该手稿还报告了构建在[523] 5/2-（频段5）和[402] 3/2+（频段7）中子轨道上的跨I-至（I-1）和I-至（I-1）和（I-1）和（I-1） - 至（I-1）和（I-1）的观察。这些交织带结构被解释为具有单纯量子数s = -i与可能的八极相关性有关的奇偶校验双线频带。

Low-spin states of 157Dy have been studied using the JUROGAM II array, following the 155Gd (α, 2n) reaction at a beam energy of 25 MeV. The level scheme of 157Dy 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 intra-band transitions. This manuscript also reports the observation of cross I- to (I-1)- and I- to (I-1)+ E1 dipole transitions inter-linking 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.

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