arXiv:nucl-th/0002065·v2·Nuclear Theory
Effect of Cluster Formation on Isospin Asymmetry in the Liquid-Gas Phase Transition Region
L. Shi🇺🇸 · P. Danielewicz (National Superconducting Cyclotron Laboratory and Department of Physics and Astronomy, Michigan State University,USA)🇺🇸
Abstract
Nuclear matter within the liquid-gas phase transition region is investigated in a mean-field two-component Fermi-gas model. Following largely analytic considerations, it is shown that: (1) Due to density dependence of asymmetry energy, some of the neutron excess from the high-density phase could be expelled into the low-density region. (2) Formation of clusters in the gas phase tends to counteract this trend, making the gas phase more liquid-like and reducing the asymmetry in the gas phase. Flow of asymmetry between the spectator and midrapidity region in reactions is discussed and a possible inversion of the flow direction is indicated.
Comments: 9 pages,3 figures, RevTex