Differential isospin-fractionation in dilute asymmetric nuclear matter

Abstract

The differential isospin-fractionation (IsoF) during the liquid-gas phase transition in dilute asymmetric nuclear matter is studied as a function of nucleon momentum. Within a self-consistent thermal model it is shown that the neutron/proton ratio of the gas phase becomes {\it smaller} than that of the liquid phase for energetic nucleons, although the gas phase is overall more neutron-rich. Clear indications of the differential IsoF consistent with the thermal model predictions are demonstrated within a transport model for heavy-ion reactions. Future comparisons with experimental data will allow us to extract critical information about the momentum dependence of the isovector strong interaction.

Rapid Communication, Phys. Rev. C (2007) in press

References in corpus (3)

• Spinodal decomposition of low-density asymmetric nuclear matter
• Temperature effects on the nuclear symmetry energy and symmetry free energy with an isospin and momentum dependent interaction
• Effects of isospin and momentum dependent interactions on liquid-gas phase transition in hot asymmetric nuclear matter

Cited by in corpus (8)

• Higher-order effects on the incompressibility of isospin asymmetric nuclear matter
• Thermal properties of asymmetric nuclear matter with an improved isospin- and momentum-dependent interaction
• Effects of isospin and momentum dependent interactions on thermal properties of asymmetric nuclear matter
• Chemical and mechanical instability in warm and dense nuclear matter
• Normal or abnormal isospin-fractionation as a qualitative probe of nuclear symmetry energy at supradensities
• Understanding the symmetry energy using data from the ALADIN-2000 Collaboration taken at the GSI Large Neutron Detector
• Nuclear Chemical and Mechanical Instability and the Liquid-Gas Phase Transition in Nuclei
• Isospin and momentum dependence of liquid-gas phase transition in hot asymmetric nuclear matter