Cluster radioactivity in superheavy nuclei

Warda, M.; Zdeb, A.; Robledo, L. M.

doi:10.1103/physrevc.98.041602

Cited by 73 publications

(52 citation statements)

References 41 publications

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“…It is worth noting that this new effect visible in our macroscopic-microscopic calculations has also been observed in Ref. [8] in the HFB calculation with the Gogny force.…”

Section: Results Of the Calculationsupporting

confidence: 85%

On the Properies of Super-heavy Even--Even Nuclei Around $^{294}$Og

Pomorski¹,

Nerlo-Pomorska²,

Bartel³

et al. 2019

Acta Phys. Pol. B

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The potential-energy surfaces of even-even super-heavy nuclei are evaluated within the LSD macroscopic-microscopic approach with a Yukawafolded mean-field potential using the Fourier shape parametrization. The calculations are performed in a four-dimensional deformation space, defined by quadrupole, octupole, hexadecapole and nonaxiality degrees of freedom. It is shown that the both pear-like and nonaxial deformation modes are important when evaluating fission barrier heights.

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“…It is worth noting that this new effect visible in our macroscopic-microscopic calculations has also been observed in Ref. [8] in the HFB calculation with the Gogny force.…”

Section: Results Of the Calculationsupporting

confidence: 85%

On the Properies of Super-heavy Even--Even Nuclei Around $^{294}$Og

Pomorski¹,

Nerlo-Pomorska²,

Bartel³

et al. 2019

Acta Phys. Pol. B

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“…Similarly, there is a highly asymmetric region just below and at Z ≈ 114 corresponding to division into a 208 Pb-like heavy fragment and the corresponding partner. In the superheavy region, a 208 Pb-like fission fragment is compatible with recent results based on density functional theory [18,19,20], whereas recent calculations using a prescission point model predicts divisions into a 132 Sn-like light fragment and the corresponding partner [21].…”

Section: Total Kinetic Energiessupporting

confidence: 86%

Calculated fission-fragment mass yields and average total kinetic energies of heavy and superheavy nuclei

et al. 2020

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Fission-fragment mass and total-kinetic-energy (TKE) distributions following fission of eveneven nuclides in the region 74 ≤ Z ≤ 126 and 92 ≤ N ≤ 230, comprising 896 nuclides have been calculated using the Brownian shape motion method. The emphasis is the region of superheavy nuclei. To show compatibility with earlier results the calculations are extended to include earlier studied regions. An island of asymmetric fission is obtained in the superheavy region, 106 ≤ Z ≤ 114 and 162 ≤ N ≤ 176, where the heavy fragment is found to be close to 208 Pb and the light fragment adjusts accordingly. Most experimentally observed α-decay chains of superheavy nuclei with Z > 113 terminate by spontaneous fission in our predicted region of asymmetric fission. In these cases, the pronounced large asymmetry is accompanied by a low TKE value compatible with measurements.

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“…Similar effects being present in actinide fission, we therefore conclude that the mechanisms driving mass-asymmetric fission are the same in both regions. It would be interesting to investigate the impact of octupole correlations in fission of superheavy elements (SHE), in which shell effects in 208 Pb could induce superasymmetric fission [76][77][78][79][80]. Similar effects have also been predicted [81][82][83][84][85] and observed [81,86] in quasifission.…”

mentioning

confidence: 75%

Effect of shell structure on the fission of sub-lead nuclei

Scamps

Simenel

2019

Phys. Rev. C

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Fission of atomic nuclei often produce mass asymmetric fragments. However, the origin of this asymmetry was believed to be different in actinides and in the sub-lead region [A. Andreyev et al., Phys. Rev. Lett. 105, 252502 (2010)]. It has recently been argued that quantum shell effects stabilising pear shapes of the fission fragments could explain the observed asymmetries in fission of actinides [G. Scamps and C. Simenel, Nature 564, 382 (2018)]. This interpretation is tested in the sub-lead region using microscopic mean-field calculations of fission based on the Hartree-Fock approach with BCS pairing correlations. The evolution of the number of protons and neutrons in asymmetric fragments of mercury isotope fissions is interpreted in terms of deformed shell gaps in the fragments. A new method is proposed to investigate the dominant shell effects in the pre-fragments at scission. We conclude that the mechanisms responsible for asymmetric fissions in the sub-lead region are the same as in the actinide region, which is a strong indication of their universality.

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Cluster radioactivity in superheavy nuclei

Cited by 73 publications

References 41 publications

On the Properies of Super-heavy Even--Even Nuclei Around $^{294}$Og

On the Properies of Super-heavy Even--Even Nuclei Around $^{294}$Og

Calculated fission-fragment mass yields and average total kinetic energies of heavy and superheavy nuclei

Effect of shell structure on the fission of sub-lead nuclei

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