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arXiv 2409.08210nucl-th
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$^{254}$No低能谱的首次完整描述

First complete description of low-lying spectroscopy in $^{254}$No

Université de Strasbourg(斯特拉斯堡大学)

D. D. Dao, F. Nowacki

AI总结:

本研究采用引入角动量投影后变分的离散非正交壳模型,首次完整描述了$^{254}$No的低能结构,与实验数据高度吻合,验证了壳模型对前沿奇特核低能性质的描述能力。

摘要:

本研究报道了对$^{254}$No低能结构的首次完整壳模型描述。研究采用Kuo-Herling有效相互作用,在离散非正交壳模型框架内开展计算,该模型近期引入了应用于非轴对称波函数的角动量投影后变分方法。计算结果与已知实验谱学数据呈现出惊人的一致性:包括Yrast带、$8^{-}$($K=8$)、$3^{+}$($K=3$)和$10^+$($K=10$)同质异能素及其相关的$K$带。研究重现了近期测量得到的$3^+$($K=3$)与$4^+$($K=4$)带头之间的Gallagher-Moszkowski分裂,还预测了第二个$0^+$态的存在,与近期的新观测结果高度吻合。此外,研究系统考察了质量数$A=251$到$A=256$范围内偶偶、奇偶、奇奇核的基态能谱、偶极矩和谱学四极矩,均得到了良好的重现。本次对$^{254}$No的描述表明,壳模型框架有能力描述这类处于现代实验核物理研究前沿的奇特核的低能性质。

英文摘要:

In this work, we report the first complete shell-model description of low-lying structures of $^{254}$No. Employing the Kuo-Herling effective interaction, the calculations are performed within the Discrete Non-Orthogonal Shell Model recently implemented with the angular-momentum Variation After Projection applied on non-axial wavefunctions. Our calculations show a striking agreement with the experimentally known spectroscopy: the \textit{Yrast} band, the $8^{-}$ ($K=8$), $3^{+}$ ($K=3$) and $10^+$ ($K=10$) isomers together with associated $K$ bands. We reproduce the recently measured Gallagher-Moszkowski splitting between the $3^+$ ($K=3$) and $4^+$ ($K=4$) band heads. We predict the appearance of a second $0^+$ state, in excellent agreement with recent new observation. In addition, we systematically examine the ground state spectra, dipole and spectroscopic quadrupole moments of even-even, odd-even, odd-odd nuclei from $A=251$ to $A=256$, which are favourably reproduced. The present description of $^{254}$No shows the ability of the Shell Model framework to describe the low-lying properties for such an exotic nucleus at the frontier of modern experimental nuclear physics research.

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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