Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2011-11-17
Phys. Rev. C 84, 044620 (2011)
Physics
Nuclear Physics
Nuclear Theory
9 pages, 6 figures
Scientific paper
10.1103/PhysRevC.84.044620
Symmetry energy for asymmetric nuclear matter at subsaturation densitieswas investigated in the framework of an isospin-dependent quantum molecular dynamics model.Asingle ratio of neutrons and protons is comparedwith the experimental data of Famiano et al. [Phys. Rev. Lett. 97, 052701 (2006)]. We have also performed a comparison for the double ratio with experimental as well as different theoretical results of Boltzmann-Uehling-Uhlenbeck in 1997, Isospin-dependent Boltzmann-Uehling-Uhlenbeck in 2004, Boltzmann-Nordeim-Vlasov, and Improved QuantumMolecular Dynamics models. It is found that the double ratio predicts the softness of symmetry energy, which is a little underestimated in the single ratio. Furthermore, the study of the single ratio is extended for different kinds of fragments, while the double ratio is extended for different neutron-rich isotopes of Sn.
Kumar Sanjeev
Ma Yong-Ge
Zhang Guo-Qiang
Zhou C. L.
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