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NpNn最大价附近丰中子~（168），~（170）Dy：Yrast带的光谱研究

Spectroscopy of Neutron-Rich 168,170Dy: Yrast Band Evolution Close to the NpNn Valence Maximum

P. -A. Söderström, J. Nyberg, P. H. Regan, A. Algora, G. de Angelis, S. F. Ashley, S. Aydin, D. Bazzacco, R. J. Casperson, W. N. Catford, J. Cederkäll, R. Chapm… 展开作者

P. -A. Söderström, J. Nyberg, P. H. Regan, A. Algora, G. de Angelis, S. F. Ashley, S. Aydin, D. Bazzacco, R. J. Casperson, W. N. Catford, J. Cederkäll, R. Chapman, L. Corradi, C. Fahlander, E. Farnea, E. Fioretto, S. J. Freeman, A. Gadea, W. Gelletly, A. Gottardo, E. Grodner, C. Y. He, G. A. Jones, K. Keyes, M. Labiche, X. Liang, Z. Liu, S. Lunardi, N. Mărginean, P. Mason, R. Menegazzo, D. Mengoni, G. Montagnoli, D. Napoli, J. Ollier, S. Pietri, Zs. Podolyák, G. Pollarolo, F. Recchia, E. Şahin, F. Scarlassara, R. Silvestri, J. F. Smith, K. -M. Spohr, S. J. Steer, A. M. Stefanini, S. Szilner, N. J. Thompson, G. M. Tveten, C. A. Ur, J. J. Valiente-Dobón, V. Werner, S. J. Williams, F. R. Xu, J. Y. Zhu

备注：
15 pages, 7 figures, submitted to Phys. Rev. C
发表信息：
Phys.Rev.C81:034310,2010
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摘要：

利用460 MeV ~（82）Se束与~（170）Er靶碰撞后的多核子转移反应，研究了丰中子镝同位素~（168）Dy的yrast序列。使用PRISMA磁谱仪鉴定反应产物，并使用HPGe探测器阵列探测伽马射线。确认了168 Dy的基态转动带的2+和4+成员，并将yrast带扩展到10+。还确定了170 Dy中4+到2+过渡的暂定候选者。这些核和轻的偶数，甚至镝同位素的数据进行解释总Routhian表面计算和集体在附近的质子-中子价积最大值的演变进行了讨论。

英文摘要：

The yrast sequence of the neutron-rich dysprosium isotope 168Dy has been studied using multi-nucleon transfer reactions following collisions between a 460-MeV 82Se beam and a 170Er target. The reaction products were identified using the PRISMA magnetic spectrometer and the gamma rays detected using the CLARA HPGe-detector array. The 2+ and 4+ members of the previously measured ground state rotational band of 168Dy have been confirmed and the yrast band extended up to 10+. A tentative candidate for the 4+ to 2+ transition in 170Dy was also identified. The data on these nuclei and on the lighter even-even dysprosium isotopes are interpreted in terms of Total Routhian Surface calculations and the evolution of collectivity in the vicinity of the proton-neutron valence product maximum is discussed.

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