September 15, 2014 to October 10, 2014
Nordita, Stockholm
Europe/Stockholm timezone

Studying the density and momentum dependent symmetry energy in a Boltzmann-Langevin approach

Not scheduled
132:028 (Nordita, Stockholm)

132:028

Nordita, Stockholm

Speaker

Prof. Feng-Shou ZHANG (College of Nuclear Science and Technology, Beijing Normal University)

Description

Constraining the neutron-proton effective mass splitting is important for extracting the momentum dependencies of the symmetry energy. Within the Boltzmann-Langevin transport model, in which the isospin and momentum- dependent potential is incorporated, we investigate the neutron-proton effective mass splitting in central 112;124;132Sn + 112;124;132Sn collisions at 50 MeV/u. It is found that the transverse momentum, rapidity, and kinetic energy distributions of free neutron over proton ratio are sensitive to the neutron-proton effective mass splitting, especially at higher transverse momenta, at higher kinetic energies, and at larger rapidities. By taking the soft density dependent symmetry energy with the neutron effective mass smaller than that of proton, the calculated results on the double neutron over proton ratios of final free nucleons can reproduce the MSU experimental data.

Primary author

Prof. Feng-Shou ZHANG (College of Nuclear Science and Technology, Beijing Normal University)

Co-author

Dr Wenjie Xie (College of Nuclear Science and Technology, Beijing Normal University)

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