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

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 calculate...

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Bibliographic Details
Published in:Chinese physics C 2013-11, Vol.37 (11), p.25-29
Main Authors: Li, Cheng, Tian, Jun-Long, Qin, Yu-Jiao, Li, Jing-Jing, Wang, Ning
Format: Article
Language:English
Subjects:
Charge distribution
Dynamical systems
Fermi surfaces
Fragments
Mathematical models
Molecular dynamics
Nuclear reactions
Nucleon-nucleon interactions
QMD模型
核反应
核子相互作用
测定
电荷分布
费米能
量子分子动力学
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Summary: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 238U＋197Au at 15 A MeV and the charge distributions for 129Xe＋12~Sn at 32 and 45 A MeV, and 197Au＋197Au 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.
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/37/11/114101