Impact of collective vibrations on quasiparticle states of open-shell odd-mass nuclei and possible interference with the tensor force

Afanasjev, A. V.; Литвинова, Елена

doi:10.1103/physrevc.92.044317

Cited by 69 publications

(62 citation statements)

References 39 publications

(106 reference statements)

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“…[1] such as NL3* and PC-PK1 are able to reproduce reasonably well the ground state properties of finite nuclei, such as binding energies and charge radii, fission barriers [41,45,55], rotating nuclei [42,44] and the energies of the single-particle states in spherical [56,57] and deformed nuclei [43,58].…”

Section: Discussionmentioning

confidence: 99%

Covariant energy density functionals: Nuclear matter constraints and global ground state properties

2016

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The correlations between global description of the ground state properties (binding energies, charge radii) and nuclear matter properties of the state-of-the-art covariant energy density functionals have been studied. It was concluded that the strict enforcement of the constraints on the nuclear matter properties (NMP) defined in Ref.[1] will not necessary lead to the functionals with good description of the binding energies and other ground and excited state properties. In addition, it will not substantially reduce the uncertainties in the predictions of the binding energies in neutron-rich systems. It turns out that the functionals, which come close to satisfying these NMP constraints, have some problems in the description of existing data. On the other hand, these problems are either absent or much smaller in the functionals which are carefully fitted to finite nuclei but which violate some NMP constraints. This is a consequence of the fact that the properties of finite nuclei are defined not only by nuclear matter properties but also by underlying shell effects. The mismatch of phenomenological content, existing in all modern functionals, related to nuclear matter physics and the physics of finite nuclei could also be responsible.

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Section: Discussionmentioning

confidence: 99%

Covariant energy density functionals: Nuclear matter constraints and global ground state properties

2016

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“…Particle-vibrational coupling is particularly large in spherical nuclei. So far, its influence on the accuracy of the description of the single-particle energies and on the sizes of shell gaps has been studied in relativistic particle-vibration [52,53] and quasiparticle-vibration [54] coupling models with the CEDFs NL3 [17] and NL3* [20] only. The experimentally known gaps of 56 Ni, 132 Sn and 208 Pb are reasonably well described in the relativistic particle-vibration calculations of Ref.…”

Section: Single-particle Structures At Spherical Shapementioning

confidence: 99%

Covariant density functional theory: Reexamining the structure of superheavy nuclei

et al. 2015

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A systematic investigation of even-even superheavy elements in the region of proton numbers 100 ≤ Z ≤ 130 and in the region of neutron numbers from the proton-drip line up to neutron number N = 196 is presented. For this study we use five most up-to-date covariant energy density functionals of different types, with a non-linear meson coupling, with density dependent meson couplings, and with density-dependent zero-range interactions. Pairing correlations are treated within relativistic Hartree-Bogoliubov (RHB) theory based on an effective separable particle-particle interaction of finite range and deformation effects are taken into account. This allows us to assess the spread of theoretical predictions within the present covariant models for the binding energies, deformation parameters, shell structures and α-decay half-lives. Contrary to the previous studies in covariant density functional theory, it was found that the impact of N = 172 spherical shell gap on the structure of superheavy elements is very limited. Similar to non-relativistic functionals some covariant functionals predict the important role played by the spherical N = 184 gap. For these functionals (NL3*, DD-ME2 and PC-PK1), there is a band of spherical nuclei along and near the Z = 120 and N = 184 lines. However, for other functionals (DD-PC1 and DD-MEδ) oblate shapes dominate at and in the vicinity of these lines. Available experimental data are in general described with comparable accuracy and do not allow to discriminate these predictions.

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“…On the other side, it is an open question, whether these shifts in observed single particle energies are an indication of the necessity of effective tensor forces in relativistic density functionals. In fact, recently it has been shown by A. Afanasjev and E. Litvinova [19] that a large part of the shifts of the 1h 11/2 and 1g 7/2 proton configurations in the Sn-region [17] can be described with the simple functional NL3* going beyong mean field and including quasiparticle-vibrational coupling [20] .…”

Section: The Problem Of Tensor Forcesmentioning

confidence: 99%

Covariant density functional theory: predictive power and first attempts of a microscopic derivation

Ring

2018

EPJ Web Conf.

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Abstract. We discuss systematic global investigations with modern covariant density functionals. The number of their phenomenological parameters can be reduced considerable by using microscopic input from ab-initio calculations in nuclear matter. The size of the tensor force is still an open problem. Therefore we use the first full relativistic Brueckner-Hartree-Fock calculations in finite nuclear systems in order to study properties of such functionals, which cannot be obtained from nuclear matter calculations.

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Impact of collective vibrations on quasiparticle states of open-shell odd-mass nuclei and possible interference with the tensor force

Cited by 69 publications

References 39 publications

Covariant energy density functionals: Nuclear matter constraints and global ground state properties

Covariant energy density functionals: Nuclear matter constraints and global ground state properties

Covariant density functional theory: Reexamining the structure of superheavy nuclei

Covariant density functional theory: predictive power and first attempts of a microscopic derivation

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