Spinodal decomposition of expanding nuclear matter and multifragmentation

Details Spinodal decomposition of expanding nuclear matter and multifragmentation Spinodal decomposition of expanding nuclear matter and multifragmentation

2003-02-07

arxiv.org/abs/nucl-th/0302015v1

Phys.Rev. C67 (2003) 034608

Physics

Nuclear Physics

Nuclear Theory

19 RevTex4 pages, 6 eps figures, to appear in Phys. Rev. C

Scientific paper

10.1103/PhysRevC.67.034608

Density fluctuations of expanding nuclear matter are studied within a mean-field model in which fluctuations are generated by an external stochastic field. Fluctuations develop about a mean one-body phase-space density corresponding to a hydrodinamic motion that describes a slow expansion of the system. A fluctuation-dissipation relation suitable for a uniformly expanding medium is obtained and used to constrain the strength of the stochastic field. The distribution of the liquid domains in the spinodal decomposition is derived. Comparison of the related distribution of the fragment size with experimental data on the nuclear multifragmentation is quite satisfactory.

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