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.

arXiv commentRapid Communication, Phys. Rev. C (2007) in press

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Cited by in corpus (14)

• Nuclear constraints on properties of neutron star crusts
• 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
• Probing isospin- and momentum-dependent nuclear effective interactions in neutron-rich matter
• Effects of isospin and momentum dependent interactions on thermal properties of asymmetric nuclear matter
• Probing the density dependence of symmetry energy via multifragmentation at sub-saturation densities
• 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
• Sensitivity of neutron to proton ratio toward the high density behavior of symmetry energy in heavy-ion collisions
• 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
• Can the nuclear symmetry potential at supra-saturation densities be negative?
• Isospin and momentum dependence of liquid-gas phase transition in hot asymmetric nuclear matter
• Density functional approach to finite temperature nuclear properties and the role of a momentum dependent isovector interaction