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, cilt.49, sa.3, 2013 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49 Sayı: 3
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1140/epja/i2013-13033-8
  • Dergi Adı: EUROPEAN PHYSICAL JOURNAL A
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

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.