Mass yields of fission fragments of Pt to Ra isotopes

Pomorski, K.; Dobrowolski, A.; Han, R.; Nerlo-Pomorska, B.; Warda, M.; Zhang, Xiao; Chen, Yongjing; Liu, Lilie; Tian, Junlong

doi:10.1103/physrevc.101.064602

Cited by 20 publications

(19 citation statements)

References 29 publications

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“…Relatively good estimates of the FMY's obtained in our previous works [8,9] for Pu and Pt to Ra isotopes encourage us to apply our model to describe and predict the mass yield for the low-energy fission of actinide nuclei from Th to Rf. Our main goal is to show that the innovatory Fourier shape parametrization [13] and the mac-mic model based on the LSD macroscopic energy [10] with the microscopic energy correction evaluated using the Yukawa-folded potential [11,12] describes well the existing fission valleys in the broad region of nuclei.…”

Section: Fission Fragment Mass-yieldsmentioning

confidence: 61%

“…The present research is a continuation and extension of our previous works [7,8,9], where more detailed description of the collective fission model was given. The fundamental idea of this approach is the use of the Born-Oppenheimer approximation (BOA) to separate the relatively slow motion towards fission, mainly in q 2 direction, from the fast vibrations in the "perpendicular" q 3 and q 4 collective coordinates.…”

Section: Simple Collective Model For Fissionmentioning

confidence: 76%

“…Here presented model is described in details in Refs. [7,8,9]. The potential energy surfaces (PES) of fissioning nuclei obtained by the macroscopic-microscopic (mac-mic) method in which the Lublin-Strasbourg Drop (LSD) model [10] has been used for the macroscopic part of the energy, while the microscopic shell and pairing corrections are evaluated using single-particle levels of the Yukawa-folded (YF) meanfield potential [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Fission fragment mass yields of Th to Rf even-even nuclei

Pomorski

Blanco

Kostryukov

et al. 2021

Preprint

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Fission properties of the actinide nuclei are deduced from theoretical analysis. We investigate potential energy surfaces and fission barriers and predict the fission fragment mass-yields of actinide isotopes. The results are compared with experimental data where available. The calculations were performed in the macroscopic-microscopic approximation with the Lublin-Strasbourg Drop (LSD) for the macroscopic part and the microscopic energy corrections were evaluated in the Yukawa-folded potential. The Fourier nuclear shape parametrization is used to describe the nuclear shape, including the non-axial degree of freedom. The fission fragment mass-yields of considered nuclei are evaluated within a 3D collective model using the Born-Oppenheimer approximation.

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Section: Fission Fragment Mass-yieldsmentioning

confidence: 61%

Section: Simple Collective Model For Fissionmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

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Fission fragment mass yields of Th to Rf even-even nuclei

Pomorski

Blanco

Kostryukov

et al. 2021

Preprint

Self Cite

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“…The present paper is a continuation of our work on fission fragment mass yields of even-even Ra-Th and actinide nuclei [21,22,23]. We have shown there the macroscopic-microscopic (mac-mic) model based on the LSD formula [24] and the Yukawa-folded single-particle potential [25] describes well both fission barrier heights and the fission fragment mass yields (FMY).…”

Section: Introductionmentioning

confidence: 63%

Potential energy surfaces and fission fragment mass yields of even-even superheavy nuclei

Kostryukov,

Dobrowolski,

Nerlo-Pomorska

et al. 2021

Preprint

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Potential energy surfaces and fission barriers of superheavy nuclei are analyzed in the macroscopicmicroscopic model. The Lublin-Strasbourg Drop (LSD) is used to obtain the macroscopic part of the energy, whereas the shell and pairing energy corrections are evaluated using the Yukawa-folded potential. A standard flooding technique has been used to determine the barrier heights. It was shown the Fourier shape parametrization containing only three deformation parameters reproduces well the nuclear shapes of nuclei on their way to fission. In addition, the non-axial degree of freedom is taken into account to describe better the form of nuclei around the ground state and in the saddles region. Apart from the symmetric fission valley, a new very asymmetric fission mode is predicted in most superheavy nuclei. The fission fragment mass distributions of considered nuclei are obtained by solving the 3D Langevin equations.

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“…For completeness, we mention the very recent results obtained using PES based on Lublin-Strasbourg drop (LSD) macroscopic energy and Yukawa-folded single-particle potential, where an extended region between platinum and radium was calculated [50]. This approach suggests a coexistence of two fission modes for the even-even isotopes [182][183][184][185][186][187][188][189][190][191][192] Pb (Fig.…”

Section: B Ffmd Calculationsmentioning

confidence: 99%

β -delayed fission of isomers in Bi188

Andel¹,

Andreyev²,

Antalic³

et al. 2020

Phys. Rev. C

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β-delayed fission (βDF) decay of a low-spin (ls) and a high-spin (hs) isomer in 188 Bi was studied at the ISOLDE facility at CERN. Isomer-selective laser ionization and time gating were employed to investigate each isomer separately and their βDF partial half-lives were determined: T 1/2p,βDF (188 Bi hs) = 5.6(8) × 10 3 s and T 1/2p,βDF (188 Bi ls) = 1.7(6) × 10 3 s. This work is the first βDF study of two states in one isotope and allows the spin dependence of low-energy fission to be explored. The fission fragment mass distribution of a daughter nuclide 188 Pb, following the β decay of the high-spin isomer, was deduced and indicates a mixture of symmetric and asymmetric fission modes. Experimental results were compared with self-consistent mean-field calculations based on the finite-range Gogny D1M interaction. To reproduce the measured T 1/2p,βDF (188 Bi hs), the calculated fission barrier of 188 Pb had to be reduced by ≈30%. After this reduction, the measured T 1/2p,βDF (188 Bi ls) was in agreement with calculations for a few possible configurations for 188 Bi ls. Theoretical βDF probabilities for these configurations were found to be lower by a factor of 4-9 than the βDF probability of 188 Bi hs. The fission fragment mass distribution of 188 Pb was compared to the scission-point model SPY and the calculations based on the finite-range liquid-drop model. The first observation of βDF for 190 Bi is also reported.

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Mass yields of fission fragments of Pt to Ra isotopes

Cited by 20 publications

References 29 publications

Fission fragment mass yields of Th to Rf even-even nuclei

Fission fragment mass yields of Th to Rf even-even nuclei

Potential energy surfaces and fission fragment mass yields of even-even superheavy nuclei

β -delayed fission of isomers in Bi188

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