Nuclear Structure Investigations in Yb isotopes

A. Zyriliou, T. Mertzimekis, A. Chalil, P. Vasileiou, S. Pelonis, M. Efstathiou, L. Stan, A. Turturica, C. Costache, R. Mihai, R. Borcea, S. Ujeniuc, S. Toma, C. Clisu, A. Oprea, A. Ionescu, I. Gheorghe, M. Boromiza, Constantinescu Mihai, C. Sotty, C. Nita, N. Mărginean, R. Mărginean, N. Florea, I. Dinescu, D. Bucurescu, D. Filipescu, R. Lica, L. Stroe, R. Șuvăilă
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Abstract

The medium-to-heavy mass ytterbium isotopes (70Yb) in the rare-earth mass region are known to be well-deformed nuclei, which can be populated to very high spin, and are predicted to exhibit interesting phenomena, such as shape coexistence. The lack of any experimental information on the structure of the neutron-rich 180Yb isotope and the lifetime of the 21+ state of 178Yb have greatly motivated this study, which can offer useful information for the collective behavior of neutrons and protons in neutron-rich Yb isotopes. A measurement was performed to investigate the population of excited states and a first measurement of the unknown 21+ lifetime of 178Yb by means of a two neutron-transfer reaction 176Yb(18O,16O)178Yb at energies 68-74 MeV using the ROSPHERE array at IFIN-HH, Romania.
Yb同位素的核结构研究
在稀土质量区中,中重质量的钇同位素(70Yb)已知是形变良好的原子核,可以填充到非常高的自旋,并且预计会表现出有趣的现象,如形状共存。180Yb富中子同位素的结构和178Yb的21+态寿命缺乏实验信息,这为富中子Yb同位素中中子和质子的集体行为提供了有用的信息。利用罗马尼亚ifinh - hh的ROSPHERE阵列,利用68-74 MeV的双中子转移反应176Yb(18O,16O)178Yb,对激发态的分布进行了测量,并首次测量了178Yb未知的21+寿命。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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