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arXiv 1912.03293nucl-th
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重形变核的Proxy-SU(3)对称性:核谱

Proxy-SU(3) symmetry for heavy deformed nuclei: nuclear spectra

D. Bonatsos, I. E. Assimakis, A. Martinou, S. K. Peroulis, S. Sarantopoulou, N. Minkov

摘要:

研究了偶-偶核中基态带和γ-1带能级间的实验能量差随角动量L的变化规律,结果表明,与振动核、γ-不稳定核和三轴核中的实验能量差相比,随角动量L的增加,实验能量差减小.在简要回顾了几个简单的集体模型的相关预言之后,我们发现这种减少是在代理SU(3)框架下由相同的三体和/或四体算符引起的,这些算符打破了基态带和γ-1带之间的简并性,并行地预言了γ-1带内奇偶交错的正确形式。

英文摘要:

The systematics of experimental energy differences between the levels of the ground state band and the gamma-1 band in even-even nuclei are studied as a function of the angular momentum L, demonstrating a decrease of the energy differences with increasing L, in contrast to what is seen in vibrational, gamma-unstable, and triaxial nuclei. After a short review of the relevant predictions of several simple collective models, it is shown that this decrease is caused in the framework of the proxy-SU(3) scheme by the same three-body and/or four body operators which break the degeneracy between the ground state band and the gamma-1 band, predicting in parallel the correct form of odd-even staggering within the gamma-1 bands.

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