Nucleon-nucleon cross sections in neutron-rich matter and isospin transport in heavy-ion reactions at intermediate energies
| dc.creator | Li, Bao-An | |
| dc.creator | Chen, Lie-Wen | |
| dc.date | 2005-08-11 | |
| dc.date.accessioned | 2026-07-07T11:28:19Z | |
| dc.date.available | 2026-07-07T11:28:19Z | |
| dc.description | Nucleon-nucleon (NN) cross sections are evaluated in neutron-rich matter using a scaling model according to nucleon effective masses. It is found that the in-medium NN cross sections are not only reduced but also have a different isospin dependence compared with the free-space ones. Because of the neutron-proton effective mass splitting the difference between nn and pp scattering cross sections increases with the increasing isospin asymmetry of the medium. Within the transport model IBUU04, the in-medium NN cross sections are found to influence significantly the isospin transport in heavy-ion reactions. With the in-medium NN cross sections, a symmetry energy of $E_{sym}(ρ)\approx 31.6(ρ/ρ_{0})^{0.69}$ was found most acceptable compared with both the MSU isospin diffusion data and the presently acceptable neutron-skin thickness in $^{208}$Pb. The isospin dependent part $K_{asy}(ρ_{0})$ of isobaric nuclear incompressibility was further narrowed down to $-500\pm 50$ MeV. The possibility of determining simultaneously the in-medium NN cross sections and the symmetry energy was also studied. The proton transverse flow, or even better the combined transverse flow of neutrons and protons, can be used as a probe of the in-medium NN cross sections without much hindrance from the uncertainties of the symmetry energy. | |
| dc.description | 32 pages including 14 figures. Submitted to Phys. Rev. C | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0508024 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0508024 | |
| dc.identifier | Phys.Rev.C72:064611,2005 | |
| dc.identifier | doi:10.1103/PhysRevC.72.064611 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/196403 | |
| dc.subject | Nuclear Theory | |
| dc.subject | Astrophysics | |
| dc.subject | Nuclear Experiment | |
| dc.title | Nucleon-nucleon cross sections in neutron-rich matter and isospin transport in heavy-ion reactions at intermediate energies | |
| dc.type | text |