Exploring effects of tensor force and its strength via neutron drops *

Wang, Zhi Heng; Naito, Tomoya; Liang, Haozhao; Long, Wen Hui

doi:10.1088/1674-1137/abf036

Cited by 6 publications

(5 citation statements)

References 106 publications

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“…Adopting these results as pseudo data, it was argued that the tensor force in the current RHF effective interactions seems too weak [111]. Meanwhile, using the same pseudo data, weaker density dependence of the p-PV coupling was suggested [115], which is related to the 'tensor renormalization persistency' [116] supported by the shell-model study. Within the non-relativistic DFT, a new Skyrme functional, namely SAMi-T, was developed under the guidance of RBHF calculations of neutron-proton drops [117].…”

Section: Rpa Methods Based On the Rhf Approachmentioning

confidence: 82%

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure^*

Long

Geng

Liu

et al. 2022

Commun. Theor. Phys.

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Regarding the stage progress on the relativistic Hartree-Fock (RHF) model achieved recently, we review the extensive developments of the model itself, including the descriptions of axially deformed unstable nuclei and nuclear spin-isospin excitations, which shows that a complete RHF framework is now available for such as exploring the tensor force effects in both ground state and excited states of unstable nuclei. Meanwhile, the recent RHF descriptions of the pseudo-spin symmetry restoration and the new magicity are also reviewed. It shows that the Fock terms, particularly the $\rho$-tensor coupling and naturally introduced tensor force components, bring about significant improvements in maintaining the delicate in-medium balance of nuclear attractions and repulsions, and uniformly interpreting the emergence of new magicity in $^{52,54}$Ca. The revealed microscopic mechanisms not only deepen our understanding on the properties of nuclear structure, but also help to guide the further development of the effective nuclear force.

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Section: Rpa Methods Based On the Rhf Approachmentioning

confidence: 82%

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure^*

Long

Geng

Liu

et al. 2022

Commun. Theor. Phys.

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“…Their initial reversal as the neutron -shell is filled, and second reversal to the original order as is filled, was predicted in [12] and recently in [10], and is reproduced here using the SGII+T parametrization. In light of recently confirmed experimental data in copper isotopes [47] obtained at RIBF, the behavior of the splitting between the and states is also of interest. The systematics of the first and states in these data suggest that the reversal of the corresponding proton orbitals takes place at around .…”

Section: −64mentioning

confidence: 96%

Tensor force impact on shell evolution in neutron-rich Si and Ni isotopes*

Sidorov,

Kornilova,

Tretyakova

2024

Chinese Phys. C

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The influence of the tensor interaction of nucleons on the characteristics of neutron-rich silicon and nickel isotopes was studied in this work. Tensor forces are taken into account within the framework of the Hartree-Fock approach with the Skyrme interaction. It is shown that the addition of tensor component of interaction improves the description of the splitting between different single-particle states and leads to a decrease in nucleon-nucleon pairing correlations in silicon and nickel nuclei. Special attention was given to the role of isovector tensor forces relevant for interaction of like nucleons.

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“…Relativistic approaches are making progress. For example, the exchange term (or Fock term) has been included [27] as one of the essential aspects of the tensor force effects [6]. Thus, the approaches by mean-field models and theories show basic feasibilities and expected successes, but the actual tractable formulations are to come.…”

Section: Shell Evolutionmentioning

confidence: 99%

Shell evolution and emerging paradigm changes

Otsuka

2023

J. Phys.: Conf. Ser.

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The shell structure conceived by Mayer and Jensen in 1949 has been shown to be quite appropriate for stable and near-stable nuclei, but substantial deviations from it have also been observed more recently for exotic nuclei with notable neutron excess. Such changes of the basic picture of the nuclear shell structure, called the shell evolution, seem to be the subject studied most extensively and most elaborately by RI beam experiments worldwide. An overview of the shell evolution is presented in this talk, from both theoretical and experimental perspectives. The shell structure is shown to be varied, for instance, from the one presented by Mayer and Jensen, by particular types of the monopole components of the effective nucleon-nucleon interaction in nuclei. Among various contributions, the importance of the tensor force is illuminated here, with an outstanding example: the emergence of new neutron magic number 34 in neutron-rich Ca isotopes. The mechanism of the shell evolution produces significant impacts also on the nuclear shapes. Type II shell evolution shifts the excitation energies of intruder deformed bands, for instance, in some Ni isotopes. In other more general cases, the monopole interaction is shown to produce unexpected crucial effects on the patters of rotational bands of heavy deformed nuclei. In fact, the shape of the ellipsoidal deformation is investigated by large-scale shell model calculations, which is nothing but the Monte Carlo Shell Model. The unique role of the monopole component of the tensor force is clarified: the interplay between this monopole interaction and the quadrupole interaction provides us with various patterns of triaxial shapes for many nuclei, such as 166Er, one of the traditional prolate deformed heavy nuclei. Thus, the prolate preponderance hypothesis by Aage Bohr is investigated for its microscopic validity. Some of the nuclear paradigms are changing now in this way, due to emerging aspects of nuclear-force effects.

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Exploring effects of tensor force and its strength via neutron drops *

Cited by 6 publications

References 106 publications

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure^*

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure^*

Tensor force impact on shell evolution in neutron-rich Si and Ni isotopes*

Shell evolution and emerging paradigm changes

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Exploring effects of tensor force and its strength via neutron drops *

Cited by 6 publications

References 106 publications

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure *

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure *

Tensor force impact on shell evolution in neutron-rich Si and Ni isotopes*

Shell evolution and emerging paradigm changes

Contact Info

Product

Resources

About

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure^*

Relativistic Hartree–Fock model and its recent progress on the description of nuclear structure^*