Investigations of spinodal dynamics in asymmetric nuclear matter within a stochastic relativistic model

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YILMAZ O., Ayik S., ACAR F. P., Saatci S., GÖKALP A.

EUROPEAN PHYSICAL JOURNAL A, vol.49, no.3, 2013 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 49 Issue: 3
  • Publication Date: 2013
  • Doi Number: 10.1140/epja/i2013-13033-8
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Middle East Technical University Affiliated: Yes


Early development of spinodal instabilities and density correlation functions in asymmetric nuclear matter are investigated in the stochastic extension of the Walecka-type relativistic mean field including coupling with rho meson. Calculations are performed under typical conditions encountered in heavy-ion collisions and in the crusts of neutron stars. In general, growth of instabilities occur relatively slower for increasing charge asymmetry of matter. At higher densities around rho = 0.4 rho(0) fluctuations grow relatively faster in the quantal description than those found in the semi-classical limit. Typical sizes of early condensation regions extracted from density correlation functions are consistent with those found from dispersion relations of the unstable collective modes.