Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around <sup>270</sup>Hs *

Wang, Xiaoqian; Sun, Xiang-Xiang; Zhou, Shan‐Gui

doi:10.1088/1674-1137/ac3904

Cited by 16 publications

(9 citation statements)

References 89 publications

(107 reference statements)

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“…where Y λ0 (θ) is reduced from the standard spherical harmonics Y λµ (θ, φ) with magnetic quantum number µ = 0. The corresponding deformation parameter β λ,τ is then given by [41,42]…”

Section: A Skyrme-hartree-fock Modelmentioning

confidence: 99%

Free spectator nucleons in ultracentral relativistic heavy-ion collisions as a probe of neutron skin

Liu

Zhang

et al. 2022

Phys. Rev. C

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Besides the yield ratio of free spectator neutrons produced in ultracentral 96 Zr+ 96 Zr to 96 Ru+ 96 Ru collisions [1], we propose that the yield ratio Nn Np of free spectator neutrons to protons in a single collision system at RHIC and LHC can be a more sensitive probe of the neutron-skin thickness ∆rnp and the slope parameter L of the symmetry energy. The idea is demonstrated based on the proton and neutron density distributions of colliding nuclei obtained from Skyrme-Hartree-Fock-Bogolyubov calculations, and a Glauber model that provides information of spectator matter. The final spectator particles are produced from direct emission, clusterization by a minimum spanning tree algorithm or a Wigner function approach, and deexcitation of heavy clusters by GEMINI. A larger ∆rnp associated with a larger L value increases the isospin asymmetry of spectator matter and thus leads to a larger Nn Np, especially in ultracentral collisions where the multiplicity of free nucleons are free from the uncertainties of cluster formation and deexcitation. We have further shown that the double ratio of Nn Np in isobaric collision systems or in collisions by isotopes helps to cancel the detecting efficiency for protons. Effects from nuclear deformation and electromagnetic excitation are studied, and they are found to be subdominant compared to the expected sensitivity to ∆rnp.

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Section: A Skyrme-hartree-fock Modelmentioning

confidence: 99%

Free spectator nucleons in ultracentral relativistic heavy-ion collisions as a probe of neutron skin

Liu

Zhang

et al. 2022

Phys. Rev. C

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“…Furthermore, it is shown in Refs. [114,124] that the effects of higher order deformations such as β 4 and β 6 are very important. The decay rates of multi-neutron radioactivity in Ba and Sm isotopic chains are estimated by using the direct decay model in Ref.…”

Section: B the Limits Of The Nuclear Landscapementioning

confidence: 99%

Nuclear mass table in deformed relativistic Hartree-Bogoliubov theory in continuum: I. even-even nuclei

Collaboration¹,

Zhang²,

Cheoun³

et al. 2022

Preprint

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Ground-state properties of even-even nuclei with 8 ≤ Z ≤ 120 from the proton drip line to the neutron drip line have been investigated using the deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc) with the density functional PC-PK1. With the effects of deformation and continuum included simultaneously, 2583 even-even nuclei are predicted to be bound. The calculated binding energies, two-nucleon separation energies, root-mean-square (rms) radii of neutron, proton, matter, and charge distributions, quadrupole deformations, and neutron and proton Fermi surfaces are tabulated and compared with available experimental data. The rms deviation from the 637 mass data is 1.518 MeV, providing one of the best microscopic descriptions for nuclear masses. The drip lines obtained from DRHBc calculations are compared with other calculations, including the spherical relativistic continuum Hartree-Bogoliubov (RCHB) and triaxial relativistic Hartree-Bogoliubov (TRHB) calculations with PC-PK1. The deformation and continuum effects on the limits of the nuclear landscape are discussed. Possible peninsulas consisting of bound nuclei beyond the two-neutron drip line are predicted. The systematics of the two-nucleon separation energies, two-nucleon gaps, rms radii, quadrupole deformations, potential energy curves, neutron densities, neutron mean-field potentials, and pairing energies in the DRHBc calculations are also discussed. In addition, the α decay energies extracted are in good agreement with available data.

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“…Both macroscopic-microscopic models and self-consistent microscopic models predict proton magic numbers beyond Z = 82, e.g., 114, 120, and 126, and neutron magic number beyond N = 126, i.e., 184; the nuclei with and around these magic numbers have relatively high stability with respect to spontaneous fission, forming an "island of stability" of superheavy nuclei (SHN) beyond the mainland in the chart of nuclides [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. In addition, a shoal of SHN around Z = 108 and N = 162, in between the mainland and the elusive island of stability, has been predicted and studied extensively [31][32][33][34][35][36][37]. Meanwhile, much efforts have been made to study the synthesis mechanism of SHN both theoretically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Examination of promising reactions with $^{241}$Am and $^{244}$Cm targets for the synthesis of new superheavy elements within the dinuclear system model with a dynamical potential energy surface

Deng,

Zhou

2023

Preprint

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Two actinide isotopes, 241 Am and 244 Cm, produced and chemically purified by the HFIR/REDC complex at ORNL are candidates for target materials of heavy-ion fusion reaction experiments for the synthesis of new superheavy elements (SHEs) with Z > 118. In the framework of the dinuclear system model with a dynamical potential energy surface (DNS-DyPES model), we systematically study the 48 Ca-induced reactions that have been applied to synthesize SHEs with Z = 112-118, as well as the hot-fusion reactions with 241 Am and 244 Cm as targets which are promising for synthesizing new SHEs with Z = 119-122. Detailed results including the maximal evaporation residue cross section and the optimal incident energy for each reaction are presented and discussed.

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Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around ²⁷⁰Hs *

Cited by 16 publications

References 89 publications

Free spectator nucleons in ultracentral relativistic heavy-ion collisions as a probe of neutron skin

Free spectator nucleons in ultracentral relativistic heavy-ion collisions as a probe of neutron skin

Nuclear mass table in deformed relativistic Hartree-Bogoliubov theory in continuum: I. even-even nuclei

Examination of promising reactions with $^{241}$Am and $^{244}$Cm targets for the synthesis of new superheavy elements within the dinuclear system model with a dynamical potential energy surface

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Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around 270Hs *

Cited by 16 publications

References 89 publications

Free spectator nucleons in ultracentral relativistic heavy-ion collisions as a probe of neutron skin

Free spectator nucleons in ultracentral relativistic heavy-ion collisions as a probe of neutron skin

Nuclear mass table in deformed relativistic Hartree-Bogoliubov theory in continuum: I. even-even nuclei

Examination of promising reactions with $^{241}$Am and $^{244}$Cm targets for the synthesis of new superheavy elements within the dinuclear system model with a dynamical potential energy surface

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Microscopic study of higher-order deformation effects on the ground states of superheavy nuclei around ²⁷⁰Hs *