Effective Nucleon Masses from Heavy Ion Collisions

Abstract

We probe the momentum dependence of the isovector mean-field potential by comparing the energy spectra of neutrons and protons emitted in ${}^{112}$Sn+${}^{112}$Sn and ${}^{124}$Sn+${}^{124}$Sn collisions at incident energies of E/A=50 and 120 MeV. We achieve experimental precision that discriminates between different momentum dependencies for the symmetry mean-field potential. Comparisons of the experimental results to Improved Quantum Molecular Dynamics model calculations with Skyrme Interactions indicate small differences between the neutron and proton effective masses.

6 pages, 2 figures

References in corpus (8)

• Neutron and Proton Transverse Emission Ratio Measurements and the Density Dependence of the Asymmetry Term of the Nuclear Equation of State
• Symmetry Energy of Nucleonic Matter With Tensor Correlations
• The influence of cluster emission and the symmetry energy on neutron-proton spectral double ratios
• Constraints on symmetry energy and nucleon effective mass splitting with Heavy Ion Collisions
• Nucleon effective masses within the Brueckner-Hartree-Fock theory: Impact on stellar neutrino emission
• Neutron-proton effective mass splitting in neutron-rich matter at normal density from analyzing nucleon-nucleus scattering data within an isospin dependent optical model
• Covariance Analysis of Symmetry Energy Observables from Heavy Ion Collision
• Revisit of the neutron/proton ratio puzzle in intermediate-energy heavy-ion collisions

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