超重核的四面体对称性(英文)

Tetrahedral Symmetry in Superheavy Nuclei

摘要: 基于反射不对称壳模型的投影位能面计算预言原子核³¹⁰126 是继²⁰⁸Pb 之后的双幻核，其基态呈现出四面体形状。四面体对称性驱动的量子效应可以使基态的结合能，相较球形而言增加达13 MeV，这反映了在最重核的计算中，考虑四面体自由度的重要性。计算结果还表明，四面体对称性驱动的量子效应能够明显地增加裂变位垒，从而导致超重核合成几率的增加。

Abstract: The projected energy surface calculations based on the reflection asymmetric shell model predict that nucleus ³¹⁰126 is the doubly magic nucleus next to ²⁰⁸Pb and has a tetrahedral shape in its ground state.The tetrahedral symmetry-driven quantal effects may lead to an increase of binding energy of the ground state by about 13 MeV with respect to the corresponding spherical shape, indicating the importance of inclusion of the tetrahedral degree of freedom in calculations for the heaviest nuclei. The results show that the tetrahedral symmetry-driven quantal effects can significantly increase the fission barriers and therefore result in increased survival probabilities of superheavy nuclei.