Effects of In-Medium Nucleon-Nucleon Cross Section and Nuclear Density Distribution on the Proton-Nucleus Total Reaction Cross Section

【摘要】 We present the proton-total reaction cross sectionsσ_R by comparing the experimental data with the Glauber model calculation using four sets of nucleon-nucleon cross sections used in literature(free nucleon-nucleon cross sections(NNCS),phenomenological NNCS,Bruckner-type NNCS and Pauli NNCS)and different nuclear densities for symmetric and asymmetric nuclei.For light symmetric target nuclei,the experimentalσ_R data are well reproduced by the former three NNCS with the ground state density distributions of relativistic mean-field theory.On the other hand,for asymmetry heavier target nuclei,the calculations of theσ_R data depend significantly on the nuclear density distribution at large radius in the low energy region.The experimentalσ_R of these nuclei are well reproduced by the empirical 3pF density distribution and the in-medium NNCS.The neutron surface distributions are also discussed based on the 3 pF nuclear charge distributions.更多还原

【Abstract】 We present the proton-total reaction cross sections σ_R by comparing the experimental data with the Glauber model calculation using four sets of nucleon-nucleon cross sections used in literature(free nucleon-nucleon cross sections(NNCS),phenomenological NNCS,Bruckner-type NNCS and Pauli NNCS)and different nuclear densities for symmetric and asymmetric nuclei.For light symmetric target nuclei,the experimental σ_R data are well reproduced by the former three NNCS with the ground state density distributions of relativistic mean-field theory.On the other hand,for asymmetry heavier target nuclei,the calculations of the σ_R data depend significantly on the nuclear density distribution at large radius in the low energy region.The experimental σ_R of these nuclei are well reproduced by the empirical 3pF density distribution and the in-medium NNCS.The neutron surface distributions are also discussed based on the 3pF nuclear charge distributions.更多还原