Sensitivity of the nuclear deformability and fission barriers to the equation of state

Seif, W. M.; Anwer, Hisham

doi:10.1016/j.nuclphysa.2018.04.005

Cited by 10 publications

(2 citation statements)

References 93 publications

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“…A semi-microscopic model based on energy density functional with the Skyrme force, Strutinsky's shell, and pairing correction is used to calculate the total energy surface of the 208 Pb nucleus in a multidimensional space, . The seven variables of the total energy surface in the procedure, used in this study, are based on the d3pF The differential evolution method, proposed by Storn and Price [52], is used to minimize the total energy in the multidimensional space, and then, obtain the ground state binding energy and neutron density distribution parameters. The differential evolution method provides an efficient adaptive scheme for global optimization over con-E(R, a, 0, 0, 0, 0, 0) E(R, a, w, 0, 0, 0, 0) tinuous spaces, and it was used with the semi-microscopic approach to study the nuclear structure of 230 Th [53] and Og isotopes [45].…”

Section: Resultsmentioning

confidence: 99%

Investigation of neutron density distribution of ²⁰⁸Pb nucleus when the proton density is constrained to its experimental distribution

Abdulghany¹

2020

Chinese Phys. C

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In this study, two novel improvements for the theoretical calculation of neutron distributions are presented. First, the available experimental proton distributions are used as a constraint rather than inferred from the calculation. Second, the recently proposed distribution formula, d3pF, is used for the neutron density, which is more detailed than the usual shapes, for the first time in a nuclear structure calculation. A semi-microscopic approach for binding energy calculation is considered in this study. However, the proposed improvements can be introduced to any other approach. The ground state binding energy and neutron density distribution of 208Pb nucleus are calculated by optimizing the binding energy considering three different distribution formulae. The implementation of the proposed improvements leads to qualitative and quantitative improvements in the calculation of the binding energy and neutron density distribution. The calculated binding energy agrees with the experimental value, and the calculated neutron density exhibits fluctuations within the nuclear interior, which corresponds with the predictions of self-consistent approaches.

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Section: Resultsmentioning

confidence: 99%

Investigation of neutron density distribution of ²⁰⁸Pb nucleus when the proton density is constrained to its experimental distribution

Abdulghany¹

2020

Chinese Phys. C

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“…Thus, significant advancements have come from astrophysical observations of NS to probe the EOS at high compact densities. Data of finite nuclei and terrestrial experiments cannot reach such high density, they can be used to probe the EOS for densities less than double the saturation density [23][24][25]. Although the effective-field theory techniques and quantum chromodynamics serve as a solid guide for theoretical work [26,27], we still have uncertainty and unclear answers of a few questions regarding the knowledge of the accurate structure of NS and of their core composition [7].…”

Section: Introductionmentioning

confidence: 99%

Mass–radius relation of neutron stars and massive pulsars with realistic equation of state

Seif,

Hashem,

Abualhamd

2024

J. Phys. G: Nucl. Part. Phys.

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We use up-to-date constraints on the mass and radius of 15 neutron star objects and pulsars, from electromagnetic and gravitational wave observables and different theoretical schemes, to extend the nuclear equation of state (EOS) based on realistic M3Y nucleon-nucleon interaction, which truly accounts for the low-density EOS of nuclear matter, to describe dense nuclear matter. The considered EOSs are employed to map the mass-radius profiles using the Tolman-Oppenheimer-Volkoff equations of hydrostatic equilibrium. We found that the EOSs from CDM3Y-230 to CDM3Y-270, with saturation incompressibility K0=230-270 MeV, successfully reproduce most of the recent constraints on the NS masses and radii. Based on both M3Y-Paris and M3Y-Reid NN interactions, these EOSs indicate radius of 11.67±0.34 km for the NS of 1.4Mʘmass, and the expected maximum NS mass (Mmax) to be 1.93±0.21 Mʘ. The upper limits of constraints indicated stiffer EOSs of K0=300 – 330 MeV, which have estimated 1arger radii of 12.29±0.14 km for NS (1.4Mʘ) and heavier Mmaxof 2.31±0.14 Mʘ. Increasing the stiffness of the employed EOS is found to increase the indicated maximum mass of NS, its radius and maximum compactness, the corecrust transition density, the speed of sound in its interior, and slightly the transition proton-fraction, but to decrease the abundance of the proton, muon, and electron over npeμ core matter of NS, as well as the estimated central density.

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Ground-state and stability properties of Og118288−308 isotopes based on semi-microscopic calculations

2019

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Sensitivity of the nuclear deformability and fission barriers to the equation of state

Cited by 10 publications

References 93 publications

Investigation of neutron density distribution of ²⁰⁸Pb nucleus when the proton density is constrained to its experimental distribution

Investigation of neutron density distribution of ²⁰⁸Pb nucleus when the proton density is constrained to its experimental distribution

Mass–radius relation of neutron stars and massive pulsars with realistic equation of state

Ground-state and stability properties of Og118288−308 isotopes based on semi-microscopic calculations

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Sensitivity of the nuclear deformability and fission barriers to the equation of state

Cited by 10 publications

References 93 publications

Investigation of neutron density distribution of 208Pb nucleus when the proton density is constrained to its experimental distribution

Investigation of neutron density distribution of 208Pb nucleus when the proton density is constrained to its experimental distribution

Mass–radius relation of neutron stars and massive pulsars with realistic equation of state

Ground-state and stability properties of Og118288−308 isotopes based on semi-microscopic calculations

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Investigation of neutron density distribution of ²⁰⁸Pb nucleus when the proton density is constrained to its experimental distribution

Investigation of neutron density distribution of ²⁰⁸Pb nucleus when the proton density is constrained to its experimental distribution