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Spinodal instabilities in nuclear matter in a stochastic relativistic mean-field approach

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2009-09-01
Ayik, S.
Yılmaz Tüzün, Özgül
Er, N.
Gokalp, A.
Ring, P.
Spinodal instabilities and early growth of baryon density fluctuations in symmetric nuclear matter are investigated in the basis of the stochastic extension of the relativistic mean-field approach in the semiclassical approximation. Calculations are compared with the results of nonrelativistic calculations based on Skyrme-type effective interactions under similar conditions. A qualitative difference appears in the unstable response of the system: the system exhibits most unstable behavior at higher baryon densities around rho(b) = 0.4 rho(0) in the relativistic approach while most unstable behavior occurs at lower baryon densities around rho(b) = 0.2 rho(0) in the nonrelativistic calculations