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Title: Density dependence of the symmetry energy and the equation of state of isospin asymmetric nuclear matter

Abstract

The density dependence of the symmetry energy in the equation of state of isospin asymmetric nuclear matter is studied using the isoscaling of the fragment yields and the antisymmetrized molecular dynamic calculation. It is observed that the experimental data at low densities are consistent with the form of symmetry energy, E{sub sym}{approx_equal}31.6({rho}/{rho}{sub circle}){sup 0.69}, in close agreement with those predicted by the results of variational many-body calculation. A comparison of the present result with those reported recently using the NSCL-MSU data suggests that the heavy ion studies favor a dependence of the form, E{sub sym}{approx_equal}31.6({rho}/{rho}{sub circle}){sup {gamma}}, where {gamma}=0.6-1.05. This constrains the form of the density dependence of the symmetry energy at higher densities, ruling out an extremely 'stiff' and 'soft' dependences.

Authors:
; ;  [1]
  1. Cyclotron Institute, Texas A and M University, College Station, Texas 77843 (United States)
Publication Date:
OSTI Identifier:
20995134
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.75.034602; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASYMMETRY; COMPARATIVE EVALUATIONS; DENSITY; EQUATIONS OF STATE; HEAVY IONS; ISOSPIN; MANY-BODY PROBLEM; MOLECULAR DYNAMICS METHOD; NUCLEAR MATTER; SYMMETRY; VARIATIONAL METHODS

Citation Formats

Shetty, D. V., Yennello, S. J., and Souliotis, G. A.. Density dependence of the symmetry energy and the equation of state of isospin asymmetric nuclear matter. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.034602.
Shetty, D. V., Yennello, S. J., & Souliotis, G. A.. Density dependence of the symmetry energy and the equation of state of isospin asymmetric nuclear matter. United States. doi:10.1103/PHYSREVC.75.034602.
Shetty, D. V., Yennello, S. J., and Souliotis, G. A.. Thu . "Density dependence of the symmetry energy and the equation of state of isospin asymmetric nuclear matter". United States. doi:10.1103/PHYSREVC.75.034602.
@article{osti_20995134,
title = {Density dependence of the symmetry energy and the equation of state of isospin asymmetric nuclear matter},
author = {Shetty, D. V. and Yennello, S. J. and Souliotis, G. A.},
abstractNote = {The density dependence of the symmetry energy in the equation of state of isospin asymmetric nuclear matter is studied using the isoscaling of the fragment yields and the antisymmetrized molecular dynamic calculation. It is observed that the experimental data at low densities are consistent with the form of symmetry energy, E{sub sym}{approx_equal}31.6({rho}/{rho}{sub circle}){sup 0.69}, in close agreement with those predicted by the results of variational many-body calculation. A comparison of the present result with those reported recently using the NSCL-MSU data suggests that the heavy ion studies favor a dependence of the form, E{sub sym}{approx_equal}31.6({rho}/{rho}{sub circle}){sup {gamma}}, where {gamma}=0.6-1.05. This constrains the form of the density dependence of the symmetry energy at higher densities, ruling out an extremely 'stiff' and 'soft' dependences.},
doi = {10.1103/PHYSREVC.75.034602},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}