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Effective Nucleon Masses from Heavy Ion Collisions

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arxiv 1406.4546 v1 pith:U7H2W4HE submitted 2014-06-17 nucl-ex

Effective Nucleon Masses from Heavy Ion Collisions

classification nucl-ex
keywords collisionseffectiveexperimentalmassesmean-fieldmomentumpotentialachieve
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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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.

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