Symmetry Energy of Dilute Warm Nuclear Matter
Abstract
The symmetry energy of nuclear matter is a fundamental ingredient in the investigation of exotic nuclei, heavyion collisions, and astrophysical phenomena. New data from heavyion collisions can be used to extract the free symmetry energy and the internal symmetry energy at subsaturation densities and temperatures below 10 MeV. Conventional theoretical calculations of the symmetry energy based on meanfield approaches fail to give the correct lowtemperature, lowdensity limit that is governed by correlations, in particular, by the appearance of bound states. A recently developed quantumstatistical approach that takes the formation of clusters into account predicts symmetry energies that are in very good agreement with the experimental data. A consistent description of the symmetry energy is given that joins the correct lowdensity limit with quasiparticle approaches valid near the saturation density.
 Publication:

Physical Review Letters
 Pub Date:
 May 2010
 DOI:
 10.1103/PhysRevLett.104.202501
 arXiv:
 arXiv:1001.1102
 Bibcode:
 2010PhRvL.104t2501N
 Keywords:

 21.65.Ef;
 25.70.Pq;
 26.60.Kp;
 Symmetry energy;
 Multifragment emission and correlations;
 Equations of state of neutronstar matter;
 Nuclear Theory
 EPrint:
 4 pages, 2 figures, 1 table