Influence of the tensor force on the microscopic heavy-ion interaction potential
Influence of the tensor force on the microscopic heavy-ion interaction potential
复制标题
张量力对微观重离子相互作用势的影响
DOI：
10.1103/physrevc.98.064607
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发表时间：
2018-08
影响因子：
3.1
通讯作者：
Umar A. S.
中科院分区：
文献类型：
--
作者：
Guo Lu;Godbey K.;Umar A. S.
背景：张量相互作用在奇异核的核结构研究中起着重要的作用。然而，大多数低能核反应的微观研究忽略了张量力，导致缺乏关于张量力对HIC影响的知识......目的：需要从理论上研究张量力对重离子相互作用势的影响，以进一步了解核聚变动力学的微观机制。方法：将全Skyrme张量力应用于静态Hartree-Fock和动态密度约束时变Hartree-Fock （DC-TDHF）理论中，计算包含外来核和稳定核的反应的静态（冻结密度）和动态微观相互作用势。结果：发现静态电位系统性地高于动态电位，这是由于TDHF中包含的微观动力学效应。我们还表明，与静态势垒相比，动态势垒在张量力的作用下变化更大。用TIJ力集研究了等标量和等矢量张量项的影响。对于光系统，发现张量力对核-核势有不可察觉的影响。然而，对于中等和重自旋不饱和反应，由于张量力的加入，势可以从1 MeV的一小部分变化到近2 MeV，这表明张量力对亚势垒聚变有很强的影响。结论：张量力确实在原子核的融合中发挥了很大的作用，自旋不饱和体系的离子-离子势垒高度和宽度都有系统的增加。这种融合障碍部分是由于包含张量力的静态基态效应，尽管在研究核动力时会出现额外的障碍。
Background: The tensor interaction is known to play an important role in the nuclear structure studies of exotic nuclei. However, most microscopic studies of low-energy nuclear reactions neglect the tensor force, resulting in a lack of knowledge concerning the effect of the tensor force on HIC...... Purpose: The theoretical study of the influence of the tensor force on heavy-ion interaction potentials is required to further our understanding of the microscopic mechanisms entailed in fusion dynamics. Method: The full Skyrme tensor force is implemented into the static Hartree-Fock and dynamic density-constrained time-dependent Hartree-Fock (DC-TDHF) theory to calculate both static (frozen density) and dynamic microscopic interaction potentials for reactions involving exotic and stable nuclei. Results: The static potentials are found to be systematically higher than the dynamical results, which are attributed to the microscopic dynamical effects included in TDHF. We also show that the dynamical potential barriers vary more significantly by the inclusion of tensor force than the static barriers. The influence of isoscalar and isovector tensor terms is also investigated with the TIJ set of forces. For light systems, the tensor force is found to have an imperceptible effect on the nucleus-nucleus potential. However, for medium and heavy spin-unsaturated reactions, the potentials may change from a fraction of an MeV to almost 2 MeV by the inclusion of tensor force, indicating a strong impact of the tensor force on sub-barrier fusion. Conclusions: The tensor force could indeed play a large role in the fusion of nuclei, with spin-unsaturated systems seeing a systematic increase in ion-ion barrier height and width. This fusion hindrance is partly due to static, ground state effects from the inclusion of the tensor force, though additional hindrance appears when studying nuclear dynamics.
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影响因子：
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