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arXiv 2301.03210nucl-th
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探测超重核$^{256}$ Sg沿fission路径的结构演化

Probing the structural evolution along the fission path in the superheavy nucleus $^{256}$Sg

Ting-Ting Li, Hua-Lei Wang, Zhen-Zhen Zhang, Min-Liang Liu

摘要:

采用唯象变形Woods-Saxon势,通过多维势能面计算,预测了超重核$^{256}$ Sg裂变过程中结构性质的演化.计算的$^{256}_{106}$ Sg $_{150}$及其邻居的核变形和裂变势垒,例如,给出了$^{258,260}$ Sg,$^{254}$ Rf和$^{252}$ No的计算结果,并与其它理论结果进行了比较.提供了一系列能量图和曲线,并用于评估相应的形状不稳定性,特别是在三轴$γ$和不同十六极变形(例如,$α_{40}$、$α_{42}$和$α_{44}$)。结果表明,三轴变形有助于核绕过轴向壳的第一裂变势垒。在核能面第一个极小值之后,$γ$和十六极形变自由度可以影响核的裂变路径。此外,微观单粒子结构,配对和科里奥利效应进行了简要的调查和讨论。

英文摘要:

The evolution of structure property along the fission path in the superheavy nucleus $^{256}$Sg is predicted through the multi-dimensional potential-energy(or Routhian)-surface calculations,in which the phenomenological deformed Woods-Saxon potential is adopted. Calculated nuclear deformations and fission barriers for $^{256}_{106}$Sg$_{150}$ and its neighbors, e.g., $^{258,260}$Sg, $^{254}$Rf and $^{252}$No are presented and compared with other theoretical results. A series of energy maps and curves are provided and used to evaluate the corresponding shape-instability properties, especially in the directions of triaxial $γ$ and different hexadecapole deformations (e.g., $α_{40}$, $α_{42}$ and $α_{44}$). It is found that the triaxial deformation may help the nucleus bypass the first fission-barrier of the axial case. After the first minimum in the nuclear energy surface, the fission pathway of the nucleus can be affected by $γ$ and hexadecapole deformation degrees of freedom. In addition, microscopic single-particle structure, pairing and Coriolis effects are briefly investigated and discussed.

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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