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Guo, L1; Godbey, K; Umar, AS
Influence of the tensor force on the microscopic heavy-ion interaction potential
Source PublicationPHYSICAL REVIEW C
AbstractBackground: 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 heavy-ion collisions. An accurate description of the heavy-ion interaction potential is crucial for understanding the microscopic mechanisms of heavy-ion fusion dynamics. Furthermore, the building blocks of the heavy-ion interaction potential in terms of the ingredients of the effective nucleon-nucleon interaction provides the physical underpinnings for connecting the theoretical results with experiment. The tensor force has never been incorporated for calculating the nucleus-nucleus interaction potential. 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 TI J 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 subbarrier 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.
Subject AreaPhysics
MOST Discipline CataloguePhysics, Nuclear
Indexed BySCIE
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Cited Times:10[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Univ Chinese Acad Sci, Sch Nucl Sci & Technol, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Theoret Phys, Beijing 100190, Peoples R China
3.Godbey, K.; Umar, A. S.] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 USA
Recommended Citation
GB/T 7714
Guo, L,Godbey, K,Umar, AS. Influence of the tensor force on the microscopic heavy-ion interaction potential[J]. PHYSICAL REVIEW C,2018,98(6):64607.
APA Guo, L,Godbey, K,&Umar, AS.(2018).Influence of the tensor force on the microscopic heavy-ion interaction potential.PHYSICAL REVIEW C,98(6),64607.
MLA Guo, L,et al."Influence of the tensor force on the microscopic heavy-ion interaction potential".PHYSICAL REVIEW C 98.6(2018):64607.
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