Isospin splitting of nucleon effective mass and shear viscosity of nuclear matter

Abstract

Based on an improved isospin- and momentum-dependent interaction, we have studied the qualitative effect of isospin splitting of nucleon effective mass on the specific shear viscosity of neutron-rich nuclear matter from a relaxation time approach. It is seen that for $m_n^{\star }>m_p^{\star }$, the relaxation time of neutrons is smaller and the neutron flux between flow layers is weaker, leading to a smaller specific shear viscosity of neutron-rich matter compared to the case for $m_n^{\star }<m_p^{\star }$. The effect is larger in nuclear matter at higher densities, lower temperatures, and larger isospin asymmetries, but it doesn't affect much the behavior of the specific shear viscosity near nuclear liquid-gas phase transition.

5 pages, 5 figures

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Cited by in corpus (5)

• Revisit of the neutron/proton ratio puzzle in intermediate-energy heavy-ion collisions
• Bayesian inference on the isospin splitting of nucleon effective mass from giant resonances in ${}^{208}$Pb
• Shear viscosity of nuclear matter in the spinodal region
• Constraining neutron-proton effective mass splitting through nuclear giant dipole resonance within transport approach
• Transport properties of asymmetric nuclear matter in the spinodal region