Microscopic relativistic description of proton-nucleus scattering

Murdock, D. P.; Horowitz, C. J.

doi:10.1103/physrevc.35.1442

Cited by 152 publications

(142 citation statements)

References 25 publications

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“…The parameter a i (E kin ) denotes the Pauli blocking factor for a nucleon with kinetic energy E kin , and its value is given in Table II of Ref. [249]. Although there are still many open questions on the role of medium modification in the Dirac optical potential [249], the ρ 2/3 B density dependence of the Pauli blocking factor is consistent with the phase-space consideration for isotropic scattering [250].…”

Section: The Relativistic Impulse Approximation To the Dirac Optical supporting

confidence: 49%

“…[249]. Although there are still many open questions on the role of medium modification in the Dirac optical potential [249], the ρ 2/3 B density dependence of the Pauli blocking factor is consistent with the phase-space consideration for isotropic scattering [250]. For nucleon scattering in isospin asymmetric nuclear matter, the Pauli blocking effect becomes different for protons and neutrons.…”

Section: The Relativistic Impulse Approximation To the Dirac Optical mentioning

confidence: 61%

“…As described in detail in Ref. [249], the Dirac optical potential including the Pauli blocking effect can be written as…”

Section: The Relativistic Impulse Approximation To the Dirac Optical mentioning

confidence: 99%

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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: The Relativistic Impulse Approximation To the Dirac Optical supporting

confidence: 49%

Section: The Relativistic Impulse Approximation To the Dirac Optical mentioning

confidence: 61%

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

2008

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“…These results provide important constraints on the high energy behavior of the nuclear symmetry potential in asymmetric nuclear matter. Furthermore, with the Love-Franey NN scattering amplitude developed by Murdock and Horowitz [90,91], the intermediate-energy (100 ≤ E kin ≤ 400 MeV) behavior of the nuclear symmetry potential constructed from the Schrödinger-equivalent potential in isospin asymmetric nuclear matter has also been investigated recently [92]. It shows that the nuclear symmetry potential at fixed baryon density decreases with increasing nucleon energy.…”

Section: B Nuclear Symmetry Potentialmentioning

confidence: 99%

Isospin-dependent properties of asymmetric nuclear matter in relativistic mean field models

2007

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Using various relativistic mean-field models, including the nonlinear ones with meson field selfinteractions, those with density-dependent meson-nucleon couplings, and the point-coupling models without meson fields, we have studied the isospin-dependent bulk and single-particle properties of asymmetric nuclear matter. In particular, we have determined the density dependence of nuclear symmetry energy from these different relativistic mean-field models and compare the results with the constraints recently extracted from analyses of experimental data on isospin diffusion and isotopic scaling in intermediate-energy heavy ion collisions as well as from measured isotopic dependence of the giant monopole resonances in even-A Sn isotopes. Among the 23 parameter sets in the relativistic mean-filed model that are commonly used for nuclear structure studies, only a few are found to give symmetry energies that are consistent with the empirical constraints. We have also studied the nuclear symmetry potential and the isospin-splitting of the nucleon effective mass in isospin asymmetric nuclear matter. We find that both the momentum dependence of the nuclear symmetry potential at fixed baryon density and the isospin-splitting of the nucleon effective mass in neutron-rich nuclear matter depend not only on the nuclear interactions but also on the definition of the nucleon optical potential.

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“…Besides the Dirac phenomenology, approaches have been developed in which nucleon-nucleus scattering is described more microscopically. We mention here the relativistic impulse approximation [18][19][20] and calculations based on the Walecka model [21][22][23].…”

Section: Introductionmentioning

confidence: 99%