Large quadrupole moment in ²⁰Ne:Localization and tensor-force effects

2025/05/12 by Huai-Tong, Xue, Suo, Qiu, F., Chen C. +3
#FOS: Physical sciences #Nuclear Theory (nucl-th)

paper · doi:10.48550/arxiv.2505.07288

Abstract

Using the Beyond-Skyrme-Hartree-Fock approach with various Skyrme-type NN effective interactions, we explore the large spectroscopic quadrupole moment Q_s of the first excited 2₁⁺ state in ²⁰Ne. Our calculated Q_s(2₁⁺) ≈ -0.20~e\textrmb aligns closely with the experimental value of -0.22(2)~e\textrmb. Consistent with other theoretical methods, our results confirm the presence of an α cluster structure in this state. We also investigate the robustness of the α cluster against tensor-force, demonstrating that incorporating tensor components significantly enhances Q_s(2₁⁺) and strengthens the cluster structure along the symmetrical axis.

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