<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi>Q</mml:mi><mml:mi>α</mml:mi></mml:msub></mml:math>values in superheavy nuclei from the deformed Woods-Saxon model

Jachimowicz, P.; Kowal, M.; Skalski, Janusz

doi:10.1103/physrevc.89.024304

Cited by 45 publications

(41 citation statements)

References 66 publications

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“…The shell and pairing correction for an odd nucleon system is done by blocking the lowest-lying quasiparticle states. The modification of the macroscopic energy by including the average pairing energy contribution which we introduced for nuclear masses in [12] is irrelevant for fission barriers.…”

Section: Introductionmentioning

confidence: 99%

Adiabatic fission barriers in superheavy nuclei

2017

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Using the microscopic-macroscopic model based on the deformed Woods-Saxon single-particle potential and the Yukawa-plus-exponential macroscopic energy we calculated static fission barriers B f for 1305 heavy and superheavy nuclei 98 ≤ Z ≤ 126, including even -even, odd -even, evenodd and odd -odd systems. For odd and odd-odd nuclei, adiabatic potential energy surfaces were calculated by a minimization over configurations with one blocked neutron or/and proton on a level from the 10-th below to the 10-th above the Fermi level. The parameters of the model that have been fixed previously by a fit to masses of even-even heavy nuclei were kept unchanged. A search for saddle points has been performed by the "Imaginary Water Flow" method on a basic five-dimensional deformation grid, including triaxiality. Two auxiliary grids were used for checking the effects of the mass asymmetry and hexadecapole non-axiallity. The ground states were found by energy minimization over configurations and deformations. We find that the non-axiallity significantly changes first and second fission barrier in many nuclei. The effect of the mass -asymmetry, known to lower the second, very deformed barriers in actinides, in the heaviest nuclei appears at the less deformed saddles in more than 100 nuclei. It happens for those saddles in which the triaxiallity does not play any role, what suggests a decoupling between effects of the mass-asymmetry and triaxiality. We studied also the influence of the pairing interaction strength on the staggering of B f for oddand even-particle numbers. Finally, we provide a comparison of our results with other theoretical fission barrier evaluations and with available experimental estimates.

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Section: Introductionmentioning

confidence: 99%

Adiabatic fission barriers in superheavy nuclei

2017

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“…This was done in Ref. [34]. An α-decay hindrance of high-K configuration is expected when the same configuration in daughter has a sizable excitation.…”

Section: K-isomerism and Possible Stability Enhancementmentioning

confidence: 95%

Fusion-fission probabilities, cross sections, and structure notes of superheavy nuclei

et al. 2016

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Abstract. Fusion -fission probabilities in the synthesis of heaviest elements are discussed in the context of the latest experimental reports. Cross sections for superheavy nuclei are evaluated using the "Fusion by Diffusion" (FBD) model. Predictive power of this approach is shown for experimentally known Lv and Og isotopes and predictions given for Z = 119, 120. Ground state and saddle point properties as masses, shell corrections, pairing energies, and deformations necessary for cross-section estimations are calculated systematically within the multidimensional microscopicmacroscopic method based on the deformed Woods-Saxon single-particle potential. In the frame of the FBD approach predictions for production of elements heavier than Z = 118 are not too optimistic. For this reason, and because of high instability of superheavy nuclei, we comment on some structure effects, connected with the K-isomerism phenomenon which could lead to a significant increase in the stability of these systems.

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“…[19] for an even-even parent with the atomic number Z beyond the scope of this work to compare the QMCπ predictions for Q α with all the models in the literature. We refer the reader to, for example, [14,[39][40][41] and references therein. The important result, which has not been observed in any of the other models, is that the (weak) effects of the N = 152 and 162 shell closures disappear in nuclei with Z > 108, while the effects are enhanced for N∼180.…”

Section: Q α Valuesmentioning

confidence: 99%

Superheavy Nuclei in the Quark-Meson-Coupling Model

2017

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Abstract. We present a selection of the first results obtained in a comprehensive calculation of ground state properties of even-even superheavy nuclei in the region of 96 < Z < 136 and 118 < N < 320 from the QuarkMeson-Coupling model (QMC). Ground state binding energies, the neutron and proton number dependence of quadrupole deformations and Q α values are reported for even-even nuclei with 100 < Z < 136 and compared with available experimental data and predictions of macro-microscopic models. Predictions of properties of nuclei, including Q α values, relevant for planning future experiments are presented.

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Qαvalues in superheavy nuclei from the deformed Woods-Saxon model

Cited by 45 publications

References 66 publications

Adiabatic fission barriers in superheavy nuclei

Adiabatic fission barriers in superheavy nuclei

Fusion-fission probabilities, cross sections, and structure notes of superheavy nuclei

Superheavy Nuclei in the Quark-Meson-Coupling Model

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