AI 中文总结
研究⁸He(0₂⁺)等核激发0⁺态中三体团簇结构，用扩展团簇模型结合有效核力分析，发现⁸He(0₂⁺)有三体团簇气体特征及类二体成分混合，阐明其出现机制，指出团簇间相互作用平衡及微观泡利效应很关键。
AI 中文摘要
我们研究了⁸He(0₂⁺)中α + ²n + ²n的团簇结构，并将其与¹⁰Be(0₂⁺)中2α + ²n和¹²C(0₂⁺)中3α的团簇结构进行比较，以了解三体团簇气体态的出现机制。我们应用了一个扩展团簇模型，该模型在微观框架中结合了团簇破裂成分，使用基于核子自由度的有效核力，包括核子间的反对称化。在对激发0⁺态的三体团簇结构进行详细分析时，结果表明，⁸He(0₂⁺)呈现出类似于¹²C的α + ²n + ²n三体团簇气体特征，但包含显著的类二体(α + ²n)+²n成分混合。我们从²n - ²n和α - ²n的团簇间能量角度，与α - α能量相比较，讨论了⁸He(0₂⁺)和¹²C(0₂⁺)的团簇结构，发现类二体(α + ²n)+²n混合的起源是α - ²n和²n - ²n能量的不平衡，其中泡利效应通过团簇的动能损失和内部势能损失起到了关键作用。我们阐明了⁸He和¹²C系统激发0⁺态中三体团簇气体态的出现机制。团簇间相互作用的平衡对于三体团簇气体态的出现至关重要。微观效应，即团簇间核子的泡利效应，在激发0⁺态的团簇结构中起着关键作用。
英文摘要
We investigate the cluster structure of $α+{}^2n+{}^2n$ in $^8\mathrm{He}(0_2^+)$ and compare it with those of $2α+{}^2n$ in $^{10}\mathrm{Be}(0_2^+)$ and $3α$ in $^{12}\mathrm{C}(0_2^+)$ to understand the emergence mechanism of the 3-body cluster gas states. We apply an extended cluster model combined with cluster breaking components in a microscopic framework using effective nuclear forces based on nucleon degrees of freedom including the antisymmetrization between nucleons. In detailed analysis of the 3-body cluster structures of excited $0^+$ states, it is shown that $^8\mathrm{He}(0_2^+)$ exhibits 3-body cluster gas feature of $α+{}^2n+{}^2n$ similar to $^{12}\mathrm{C}$ but contains significant mixing of a 2-body-like $(α+{}^2n)+{}^2n$ component. We discuss cluster structures of $^8\mathrm{He}(0_2^+)$ and $^{12}\mathrm{C}(0_2^+)$ from the point of view of inter-cluster energies of ${}^2n \text{-} {}^2n$ and $α\text{-}{}^2n$ in comparison with the $α\text{-} α$ energies and find that the origin for the 2-body-like $(α+{}^2n)+{}^2n$ mixing is the unbalance of the $α\text{-}{}^2n$ and ${}^2n \text{-} {}^2n$ energies, in which Pauli effects play an essential role through the kinetic energy loss and internal potential energy loss of clusters. We clarify the emergence mechanism of the 3-body cluster gas state in excited $0^+$ states of $^8\mathrm{He}$ and $^{12}\mathrm{C}$ systems. The balance of inter-cluster interactions is essential for the appearance of 3-body cluster gas states. Microscopic effects, i.e., the Pauli effects of nucleons between clusters play a crucial role in cluster structures of excited $0^+$ states.
Comments18 pages, 14 figures
