Impact of tensor force on quantum shell effects in quasifission reactions
Impact of tensor force on quantum shell effects in quasifission reactions
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DOI：
10.1016/j.physletb.2022.137349
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发表时间：
2022-07
影响因子：
4.4
通讯作者：
Liang Li;Lu Guo;K. Godbey;A. S. Umar
中科院分区：
文献类型：
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作者：
Liang Li;Lu Guo;K. Godbey;A. S. Umar
量子壳效应驱动着多体量子系统及其相互作用的许多方面。其中包括准裂变反应，它阻碍了超重元素（SHE）搜索中复合核的形成。准裂变中的碎片产生受到壳效应的影响，壳效应是微观动力学的一种重要表现，阻碍了复合系统形成复合核的完全平衡。本文利用微观含时Hartree-Fock（TDHF）理论研究了48 Ca+ 249 Bk碰撞，探讨了核子-核子有效相互作用张量分量的影响.结果表明，张量力的引入使得球壳效应更加显著，特别是对于中子数产额，其峰值正好在幻数N= 126处。这表明张量力在核反应中的动力学壳效应的演化中起着引人注目的作用，影响着球形和变形壳间隙之间的竞争。
Quantum shell effects drive many aspects of many-body quantal systems and their interactions. Among these are the quasifission reactions that impede the formation of a compound nucleus in superheavy element (SHE) searches. Fragment production in quasifission is influenced by shell effects as a nontrivial manifestation of microscopic dynamics hindering the full equilibration of the composite system to form the compound nucleus. In this Letter, we use the microscopic time-dependent Hartree-Fock (TDHF) theory to study 48 Ca+ 249 Bk collisions to investigate the influence of the tensor component of the effective nucleon-nucleon interaction. The results show that the inclusion of the tensor force causes the spherical shell effect to become more prominent, particularly for the neutron number yield whose peak is exactly at magic number N= 126. This suggests that the tensor force plays a compelling role in the evolution of dynamical shell effects in nuclear reactions, influencing the competition between spherical and deformed shell gaps.