Low-energy shape oscillations of negative parity in the main and shape-isomeric minima in actinides

Kowal, M.; Skalski, Janusz

doi:10.1103/physrevc.82.054303

Cited by 21 publications

(14 citation statements)

References 31 publications

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“…Properly designated deformations (shapes) and energies of isomeric superdeformed (SD) minima are of great importance for the correct description of the low-lying shape oscillations in actinides [31]. One can see in Table IV that the second TABLE IV.…”

Section: Resultsmentioning

confidence: 97%

Secondary fission barriers in even-even actinide nuclei

2012

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Secondary fission barriers are calculated within the macroscopic-microscopic model in six-dimensional deformation space for even-even actinides. No special adjustable parameters are used. To search for saddle points, the "immersion" method is applied on a giant six-dimensional grid. This approach leads to a good agreement with (small deviation from) the available experimental data. Moreover, it is consistent with the other saddle-point searching technique. The influence of the incorporated nonaxiality on second fission barriers is found to be negligible, in contrast with the well-known major effect of the reflection asymmetry.

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Section: Resultsmentioning

confidence: 97%

Secondary fission barriers in even-even actinide nuclei

2012

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“…. As a purely phenomenological recipe, the single-particle shell structure, obtained with a static potential, is used and has been found appropriate for providing the required microscopic corrections [22,44,45,[53][54][55][56][57][58][59][60][61][62][63][64][65].…”

Section: Introductionmentioning

confidence: 99%

Self-consistent methods for structure and production of heavy and superheavy nuclei

et al. 2021

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Self-consistent methods for the structure of heavy and superheavy nuclei are reviewed. The construction and application of energy-density functionals are discussed. The relationship between the self-consistent methods and microscopic-macroscopic approaches is considered on the mean-field level. The extraction of single-particle potentials from the energy-density functional is described. The isotopic dependence of nucleon distributions and its influence on the nucleus-nucleus interaction is analyzed. As a new additional condition we introduce that the energy-density functional must describe the heights of the Coulomb barriers in nucleusnucleus interaction potentials, thus imposing constraints on the properties of the functional at low matter densities. The self-consistent methods are applied to describe the quasiparticle structure, cluster radioactivity, and fission of the heaviest nuclei. These methods are used to predict the probabilities of β-delayed multi-neutron emission and half-lives of β-decays and electron captures in heavy and superheavy nuclei. The predicted properties of superheavy nuclei are used to estimate the production cross-sections of superheavy nuclei in complete fusion reactions. Contents

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“…This model was widely applied to many problems of nuclear structure over many years. Recently, in a version adjusted to heavy nuclei [10], we used it to reproduce data on first [11], second [12] and third barriers [13,14] and on second minima [15] in actinides and to predict ground states and saddle-points in superheavy nuclei up to Z = 126 [16]. The general motivation of our study is to sharpen predictions of the model, i.e.…”

Section: Introductionmentioning

confidence: 99%

Qαvalues in superheavy nuclei from the deformed Woods-Saxon model

2014

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Masses of superheavy (SH) nuclei with Z = 98−128, including odd and odd-odd nuclei, are systematically calculated within the microscopic-macroscopic model based on the deformed Woods-Saxon potential. Ground states are found by minimizing energy over deformations and configurations. Pairing in odd particle-number systems is treated either by blocking or by adding the BCS energy of the odd quasiparticle. Three new parameters are introduced which may be interpreted as the constant mean pairing energies for even-odd, odd-even and odd-odd nuclei. They are adjusted by a fit to masses of heavy nuclei. Other parameters of the model, fixed previously by fitting masses of even-even heavy nuclei, are kept unchanged. With this adjustment, the masses of SH nuclei are predicted and then used to calculate α-decay energies to be compared to known measured values. It turns out that the agreement between calculated Qα values with data in SH nuclei is better than in the region of the mass fit. The model overestimates Qα for Z = 111 − 113. Ground state (g.s.) configurations in some SH nuclei hint to a possible α-decay hindrance. The calculated configurationpreserving transition energies show that in some cases this might explain discrepancies, but more data is needed to explain the situation.

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Low-energy shape oscillations of negative parity in the main and shape-isomeric minima in actinides

Cited by 21 publications

References 31 publications

Secondary fission barriers in even-even actinide nuclei

Secondary fission barriers in even-even actinide nuclei

Self-consistent methods for structure and production of heavy and superheavy nuclei

Qαvalues in superheavy nuclei from the deformed Woods-Saxon model

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