Determination of the nucleon-nucleon interaction in the ImQMD model by nuclear reactions at the Fermi energy region

作者：Li Cheng^*; Tian Jun-Long; Qin Yu-Jiao; Li Jing-Jing; Wang Ning

来源：Chinese Physics C, 2013, 37(11): 114101.

DOI：10.1088/1674-1137/37/11/114101

• nucleon-nucleon interaction
• heavy-ion collision
• ImQMD model

The nucleon-nucleon interaction is investigated by using the improved quantum molecular dynamic (ImQMD) model with three sets of parameters IQ1, IQ2 and IQ3, in which the corresponding incompressibility coefficients of nuclear matter are different. The charge distributions of fragments are calculated for various reaction systems at different incident energies. The parameters strongly affect the charge distributions and the fragment multiplicity spectrum below the threshold energy of nuclear multifragmentation. The fragment multiplicity spectrum for U-238+Au-197 at 15 A MeV and the charge distributions for Xe-129+Sn-120 at 32 and 45 A MeV, and Au-197+Au-197 at 35 A MeV are reproduced by the ImQMD model with the set of parameter IQ3. It is found that: 1) The charge distribution of the fragments and the fragment multiplicity spectrum are good observables for testing the model and the parameters. 2) The Fermi energy region is a sensitive energy region for studying nucleon-nucleon interaction.

• 出版日期2013-11
• 单位广西师范大学; 安阳师范学院