Folding model study of the isobaric analog excitation: Isovector density dependence, Lane potential, and nuclear symmetry energy

Khoa, Dao T.; Than, Hoang Sy; Cuong, Do Cong

doi:10.1103/physrevc.76.014603

Cited by 53 publications

(125 citation statements)

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“…115 CDM3Y6 interaction [159]. Khoa also deduced a symmetry energy of about 30 MeV at ρ ≈ ρ 0 from the coupled-channel analysis of the (p,n) charge-exchange reaction [517,518]. This result is consistent with earlier conclusions of several other studies using different approaches.…”

Section: 05supporting

confidence: 81%

Recent progress and new challenges in isospin physics with heavy-ion reactions

2008

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The ultimate goal of studying isospin physics via heavy-ion reactions with neutron-rich, stable and/or radioactive nuclei is to explore the isospin dependence of in-medium nuclear effective interactions and the equation of state of neutron-rich nuclear matter, particularly the isospin-dependent term in the equation of state, i.e., the density dependence of the symmetry energy. Because of its great importance for understanding many phenomena in both nuclear physics and astrophysics, the study of the density dependence of the nuclear symmetry energy has been the main focus of the intermediate-energy heavy-ion physics community during the last decade, and significant progress has been achieved both experimentally and theoretically. In particular, a number of phenomena or observables have been identified as sensitive probes to the density dependence of the nuclear symmetry energy. Experimental studies have confirmed some of these interesting isospin-dependent effects and allowed us to constrain relatively stringently the symmetry energy at sub-saturation densities. The impacts of this constrained density dependence of the symmetry energy on the properties of neutron stars have also been studied, and they were found to be very useful for the astrophysical community. With new opportunities provided by the various radioactive beam facilities being constructed around the world, the study of isospin physics is expected to remain one of the forefront research areas in nuclear physics. In this report, we review the major progress achieved during the last decade in isospin physics with heavy ion reactions and discuss future challenges to the most important issues in this field.Key words: Equation of state of asymmetric nuclear matter, Nuclear symmetry energy, Heavy-ion reactions with neutron-rich nuclei, Neutron skin thickness of heavy nuclei, Neutron stars Constraining the Skyrme effective interactions and the neutron skin thickness of heavy nuclei using terrestrial nuclear laboratory data 216 8

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Section: 05supporting

confidence: 81%

Recent progress and new challenges in isospin physics with heavy-ion reactions

2008

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“…[20]. The density dependence of the interaction (11) is assumed to have the same functional form as that introduced first in Ref.…”

Section: Extended Hf Formalism For the Single-particle Potentialmentioning

confidence: 99%

Extended Hartree-Fock study of the single-particle potential: The nuclear symmetry energy, nucleon effective mass, and folding model of the nucleon optical potential

2015

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The nucleon mean-field potential has been thoroughly investigated in an extended Hartree-Fock (HF) calculation of nuclear matter (NM) using the CDM3Y3 and CDM3Y6 density dependent versions of the M3Y interaction. The single-particle (s/p) energies of nucleons in NM are determined according to the Hugenholtz-van Hove theorem, which gives rise naturally to a rearrangement term (RT) of the s/p potential at the Fermi momentum. Using the RT obtained exactly at the different NM densities and neutron-proton asymmetries, a consistent method is suggested to take into account effectively the momentum dependence of the RT of the s/p potential within the standard HF scheme. To obtain a realistic momentum dependence of the nucleon optical potential (OP), the high-momentum part of the s/p potential was accurately readjusted to reproduce the observed energy dependence of the nucleon OP over a wide range of energies. The impact of the RT and momentum dependence of the s/p potential on the density dependence of the nuclear symmetry energy and nucleon effective mass has been studied in details. The high-momentum tail of the s/p potential was found to have a sizable effect on the slope of the symmetry energy and the neutron-proton effective mass splitting at supranuclear densities of the NM. Based on a local density approximation, the folding model of the nucleon OP of finite nuclei has been extended to take into account consistently the RT and momentum dependence of the nucleon OP in the same mean-field manner, and successfully applied to study the elastic neutron scattering on the lead target at the energies around the Fermi energy.

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“…The blue solid point in the figure correspond to the symmetry energy obtained by constraining the experimental energy of giant dipole resonance (GDR) in 208 Pb by Trippa et al [35]. The square solid point in the figure correspond to the symmetry energy obtained by fitting the experimental differential cross-section data in a charge exchange reaction using the isospin dependent interaction of the optical potential by Khoa et al [36,37]. The green solid curve in the figure is the one obtained from the dynamical AMD model comparison of the experimental isoscaling data assuming the sequential decay effect to be small [3,6].…”

Section: Current Status Of the Density Dependence Of The Symmetry Enementioning

confidence: 99%

“…Trippa et al [35], have studied the symmetry energy from the correlation between the symmetry energy and the experimental centroid energy of the Giant Dipole Resonance (GDR) in 208 Pb nuclei. Khoa et al [36,37], have studied the symmetry energy from the folding model analysis of the charge exchange p( 6 He, 6 Li)n reaction measured at 41.6 MeV/A. Danielewicz [38] have studied the symmetry energy by constraining the binding energy, neutron skin and the isospin analogue state of finite nuclei.…”

Section: Symmetry Energy From Other Studiesmentioning

confidence: 99%