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Title: Effects of energy conservation on equilibrium properties of hot asymmetric nuclear matter

Authors:
;
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1417690
Grant/Contract Number:
SC0015266
Resource Type:
Journal Article: Publisher's Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 97; Journal Issue: 1; Related Information: CHORUS Timestamp: 2018-01-22 10:14:02; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society
Country of Publication:
United States
Language:
English

Citation Formats

Zhang, Zhen, and Ko, Che Ming. Effects of energy conservation on equilibrium properties of hot asymmetric nuclear matter. United States: N. p., 2018. Web. doi:10.1103/PhysRevC.97.014610.
Zhang, Zhen, & Ko, Che Ming. Effects of energy conservation on equilibrium properties of hot asymmetric nuclear matter. United States. doi:10.1103/PhysRevC.97.014610.
Zhang, Zhen, and Ko, Che Ming. Mon . "Effects of energy conservation on equilibrium properties of hot asymmetric nuclear matter". United States. doi:10.1103/PhysRevC.97.014610.
@article{osti_1417690,
title = {Effects of energy conservation on equilibrium properties of hot asymmetric nuclear matter},
author = {Zhang, Zhen and Ko, Che Ming},
abstractNote = {},
doi = {10.1103/PhysRevC.97.014610},
journal = {Physical Review C},
number = 1,
volume = 97,
place = {United States},
year = {Mon Jan 22 00:00:00 EST 2018},
month = {Mon Jan 22 00:00:00 EST 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on January 22, 2019
Publisher's Accepted Manuscript

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  • The liquid-gas phase transition in hot asymmetric nuclear matter is investigated within the relativistic mean-field model using the density dependence of nuclear symmetry energy constrained from the measured neutron skin thickness of finite nuclei. We find symmetry energy has a significant influence on several features of liquid-gas phase transition: the boundary and area of the liquid-gas coexistence region, the maximal isospin asymmetry, and the critical values of pressure and isospin asymmetry, all of which systematically increase with increasing softness in the density dependence of symmetry energy. The critical temperature below which the liquid-gas mixed phase exists is found higher formore » a softer symmetry energy.« less
  • We have studied the effects of momentum-dependent interactions on the single-particle properties of hot asymmetric nuclear matter. In particular, the single-particle potential of protons and neutrons as well as the symmetry potential have been studied within a self-consistent model using a momentum-dependent effective interaction. In addition, the isospin splitting of the effective mass has been derived from the above model. In each case temperature effects have been included and analyzed. The role of the specific parametrization of the effective interaction used in the present work has been investigated. It has been concluded that the behavior of the symmetry potential dependsmore » strongly on the parametrization of the interaction part of the energy density and the momentum dependence of the regulator function. The effects of the parametrization have been found to be less pronounced on the isospin mass splitting.« less
  • Thermal properties of asymmetric nuclear matter are studied within a self-consistent thermal model using an isospin and momentum-dependent interaction (MDI) constrained by the isospin diffusion data in heavy-ion collisions, a momentum-independent interaction (MID), and an isoscalar momentum-dependent interaction (eMDYI). In particular, we study the temperature dependence of the isospin-dependent bulk and single-particle properties, the mechanical and chemical instabilities, and liquid-gas phase transition in hot asymmetric nuclear matter. Our results indicate that the temperature dependence of the equation of state and the symmetry energy are not so sensitive to the momentum dependence of the interaction. The symmetry energy at fixed densitymore » is found to generally decrease with temperature and for the MDI interaction the decrement is essentially due to the potential part. It is further shown that only the low momentum part of the single-particle potential and the nucleon effective mass increases significantly with temperature for the momentum-dependent interactions. For the MDI interaction, the low momentum part of the symmetry potential is significantly reduced with increasing temperature. For the mechanical and chemical instabilities as well as the liquid-gas phase transition in hot asymmetric nuclear matter, our results indicate that the boundaries of these instabilities and the phase-coexistence region generally shrink with increasing temperature and are sensitive to the density dependence of the symmetry energy and the isospin and momentum dependence of the nuclear interaction, especially at higher temperatures.« less
  • The temperature dependence of different thermodynamic quantities such as the free energy, chemical potential, symmetry energy, single particle potential, equation of state, etc., is studied for asymmetric nuclear matter within a fully self-consistent model with an effective interaction. The equation of state is found to be quite soft in agreement with supernova calculations. The critical temperature for the occurrence of a liquid gas phase transition is found to decrease with the proton to neutron ratio [gamma] and finally vanishes for pure neutron matter. The possibility of [pi][sup [minus]] condensation has also been studied.
  • The dynamics of embryonic bubbles in overheated, viscous, and non-Markovian nuclear matter is studied. We show that the memory and the Fermi surface distortions significantly affect the hindrance of bubble collapse and determine characteristic oscillations of the bubble radius. These oscillations occur due to the additional elastic force induced by the memory integral.