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arXiv 1202.3918nucl-th
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原子核中不同耦合方案的竞争

Competition of different coupling schemes in atomic nuclei

C. Qi, R. J. Liotta, R. Wyss

摘要:

壳层模型计算表明,$N=Z$核$^{92}_{46}$ Pd和$^{96}$ Cd的基态和低激发态主要是建立在自旋取向的中子-质子对上的,每个中子-质子对都携带着壳层$0g_{9/2}$所允许的最大角动量J=9,而壳层在该核区占主导地位.这种激发模式在原子核中是独特的,并且表明自旋对准对必须被认为是原子核结构计算中的基本构件。在这篇文章中,我们将详细讨论这种中子-质子对耦合方案。特别是,我们将探讨正常的自旋对耦合和自旋对齐耦合方案之间的竞争。这种耦合可能有助于阐明$N=Z$和相邻核的结构性质。

英文摘要:

Shell model calculations reveal that the ground and low-lying yrast states of the $N=Z$ nuclei $^{92}_{46}$Pd and $^{96}$Cd are mainly built upon isoscalar spin-aligned neutron-proton pairs each carrying the maximum angular momentum J=9 allowed by the shell $0g_{9/2}$ which is dominant in this nuclear region. This mode of excitation is unique in nuclei and indicates that the spin-aligned pair has to be considered as an essential building block in nuclear structure calculations. In this contribution we will discuss this neutron-proton pair coupling scheme in detail. In particular, we will explore the competition between the normal monopole pair coupling and the spin-aligned coupling schemes. Such a coupling may be useful in elucidating the structure properties of $N=Z$ and neighboring nuclei.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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