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曹颖逾, 陶德晔, 周波. 10Be原子核微观团簇结构研究[J]. 原子核物理评论, 2024, 41(1): 148-155. DOI: 10.11804/NuclPhysRev.41.2023CNPC87
引用本文: 曹颖逾, 陶德晔, 周波. 10Be原子核微观团簇结构研究[J]. 原子核物理评论, 2024, 41(1): 148-155. DOI: 10.11804/NuclPhysRev.41.2023CNPC87
Yingyu CAO, Deye TAO, Bo ZHOU. Microscopic Cluster Study of the 10Be Nucleus[J]. Nuclear Physics Review, 2024, 41(1): 148-155. DOI: 10.11804/NuclPhysRev.41.2023CNPC87
Citation: Yingyu CAO, Deye TAO, Bo ZHOU. Microscopic Cluster Study of the 10Be Nucleus[J]. Nuclear Physics Review, 2024, 41(1): 148-155. DOI: 10.11804/NuclPhysRev.41.2023CNPC87

10Be原子核微观团簇结构研究

Microscopic Cluster Study of the 10Be Nucleus

  • 摘要: 使用微观四体簇模型,研究了 \rm ^10Be 原子核的能谱和团簇结构。计算了物理量,如均方根(r.m.s.)半径和电磁跃迁强度。低能态的能量和某些电磁跃迁强度的理论结果与实验数据吻合良好。我们的计算显示 0_3^+ 有显著的半径和标量单极子跃迁强度,这些性质表明 0_3^+ 态有明显的团簇结构。在激发能 E_\rm x<15 MeV范围内得到三个 1^- 态,这些态表现出显著的偶极子跃迁强度,暗示了 1^- 态可能存在团簇结构。利用获得的波函数,计算了约化宽度振幅(RWAs)以研究 ^6\textHe+\alpha 和 ^9\textBe+ \rmn 在 \rm ^10Be 的两体团簇结构。RWAs的结果表明,在 \rm ^10Be 低能态中存在 ^6\textHe+\alpha 和 ^9\textBe+ \rmn 的两体结构,但随着能量升高, ^6\textHe+\alpha 的成分会减小,这可能是由于 \rm^6He 和 \rm^9Be 在较高激发能量下会破裂。此外,有少量高于 \alpha+\alpha+ \rmn+ \rmn 阈值的态依然存在显著 \rm^9Be + \mathrmn 组分。

     

    Abstract: Using a microscopic four-body cluster model, we investigate the spectral properties and structural configurations of the \rm ^10Be nucleus. We calculate physical quantities such as the root-mean-squared (r.m.s.) radii and electromagnetic transition strengths. The theoretical results for the energies and certain electromagnetic transition strengths of the low-lying states show good agreement with experimental data. In particular, the enhancement of the r.m.s. radius and isoscalar monopole transition strength of the 0_3^+ state indicates a well-developed cluster structure. We obtained three 1^- states in E_\rm x< 15 MeV that show remarkable dipole transition strengths, suggesting that the 1^- states may have cluster structure. Using the obtained wave functions, we calculate the reduced-width amplitudes (RWAs) to investigate the ^6\textHe+\alpha and ^9\textBe+ \rmn two-body cluster structures in 10Be. The results suggest that the low-lying states show the two-body ^6\textHe+\alpha and \rm ^9Be+ \rmn configuration, with the ^6\textHe+\alpha components of the two-body structure diminishing as the energy increases, which due to the breakup of \rm^6He and \rm^9Be at higher excitation energies. Moreover, a few states above the \alpha+\alpha+ \rmn+ \rmn threshold still exhibit significant ^9\textBe+ \rmn components.

     

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