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Density dependence of the 'symmetry energy' in the lattice gas model
- Source :
- Chin. Phys. Lett. 25 (2008) 2000
- Publication Year :
- 2007
-
Abstract
- Isoscaling behavior of the statistical emission fragments from the equilibrated sources with $Z$ = 30 and $N$ = 30, 33, 36 and 39, resepectively, is investigated in the framework of isospin dependent lattice gas model. The dependences of isoscaling parameters $\alpha$ on source isospin asymmetry, temperature and freeze-out density are studied and the "symmetry energy" is deduced from isoscaling parameters. Results show that "symmetry energy" $C_{sym}$ is insensitive to the change of temperature but follows the power-law dependence on the freeze-out density $\rho$. The later gives $C_{sym}$ = 30$(\rho/\rho_0)^{0.62}$ if the suitable asymmetric nucleon-nucleon potential is taken. The effect of strength of asymmetry of nucleon-nucleon interaction potential on the density dependence of the "symmetry energy" is dicussed.<br />Comment: 5 pages, 4 pages
- Subjects :
- Nuclear Theory
Subjects
Details
- Database :
- arXiv
- Journal :
- Chin. Phys. Lett. 25 (2008) 2000
- Publication Type :
- Report
- Accession number :
- edsarx.0711.0118
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/0256-307X/25/6/021