Static fission properties of actinide nuclei

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

doi:10.1103/physrevc.101.014311

“…Presently, many other theoretical predictions performed within these two approaches exist (see Refs. [87][88][89][90] and references therein) and their results are equally valid as those selected in this paper and will not affect the quality of the discussion.…”

Section: Discussionsupporting

confidence: 69%

Search for elements 119 and 120

Khuyagbaatar¹,

Yakushev²,

Düllmann³

et al. 2020

View full text Add to dashboard Cite

“…The fission barrier parameters were deduced to be E A = 6.05 ± 0.15 MeV, E B = 5.35 ± 0.15 MeV, hω A = 0.65 MeV and [36]. On the other hand, the present barrier parameters are inconsistent with the PES obtained in the most recent Woods-Saxon microscopic-macroscopic calculations [8]. Other evaluated theoretical results [9,10] show better agreement with our experimental data.…”

Section: On the Fission Barrier Of 238 Npcontrasting

confidence: 56%

“…In recent years, large efforts have been devoted to calculate the potential energy surfaces of the actinides, and to provide a comprehensive set of fission barrier heights and excitation energies of potential minima. These calculations employed a variety of theoretical approaches, such as microscopicmacroscopic models with different parametrization [7][8][9][10][11] as well as relativistic mean-field calculations [12,13]. Most of these calculations resulted in a significant deviation with 0.5-1.5 MeV, furthermore they were inconsistent with the experimental values as well.…”

Section: Introductionmentioning

confidence: 99%

Fission resonances observed in the $$^{237}$$Np(d,pf) reaction and the fission barrier topology of $$^{238}$$Np

Csige

¹

,

Csatlós

²

,

Habs

³

et al. 2022

Eur. Phys. J. A

3

0

View full text Add to dashboard Cite

The fission probability of $$^{238}$$ 238 Np was measured as a function of the excitation energy in the energy range of E$$^* = 5.4 - 6.2$$ ∗ = 5.4 - 6.2 MeV in order to search for transmission fission resonances. A radioactive $$^{237}$$ 237 Np target was bombarded with deuterons of E$$_d$$ d = 12 MeV, whereas the energy of the protons was analyzed with a superior resolution of $$\varDelta $$ Δ E = 8 keV. The experiment was performed at the Tandem accelerator of the Maier-Leibnitz Laboratory in Garching employing the $$^{237}$$ 237 Np(d,pf) reaction. A group of fission resonances has been observed at excitation energies between E$$^* = 5.5 - 5.8$$ ∗ = 5.5 - 5.8 MeV, which could be ordered into three (superdeformed) rotational bands with a rotational parameter of $$\hbar ^2/2\varTheta = 3.507$$ ħ 2 / 2 Θ = 3.507 keV, and identified as the first direct observation of transition states composing rotational bands in an odd-odd nucleus as they appear above the top of the outer fission barrier. Nuclear reaction code (talys1.95) calculations were also performed to extract the multi-humped fission barrier parameters of $$^{238}$$ 238 Np by fitting them to the experimental data of the present (d,pf) and previous (n,f) experiments. The extracted barrier parameters also support the above interpretation of the observed resonances.

show abstract

“…. 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%

“…As such, they are still indispensable tools for heavy and superheavy nuclei research, including not only bulk properties but also dynamical processes like fusion and fission reactions. The nuclear ground-state masses and deformations, actinide fission-barrier heights, spontaneous fission half-lives, fission-fragment charge yields, electron capture (EC) delayed fission and some prompt neutron-capture data were successfully described within the Mic-Mac approach [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

Adamian

¹

,

Antonenko

²

,

Lenske

³

et al. 2021

View full text Add to dashboard Cite

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

show abstract

Static fission properties of actinide nuclei

Cited by 38 publications

References 51 publications

Search for elements 119 and 120

Search for elements 119 and 120

Fission resonances observed in the $$^{237}$$Np(d,pf) reaction and the fission barrier topology of $$^{238}$$Np

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

Contact Info

Product

Resources

About