High-energy behavior of the nuclear symmetry potential in asymmetric nuclear matter
- Institute of Theoretical Physics, Shanghai Jiao Tong University, Shanghai 200240 (China)
- Cyclotron Institute and Physics Department, Texas A and M University, College Station, Texas 77843-3366 (United States)
- Department of Chemistry and Physics, Arkansas State University, Jonesboro, Arkansas 72467-0419 (United States)
Using the relativistic impulse approximation with empirical NN scattering amplitude and the nuclear scalar and vector densities from the relativistic mean-field theory, we evaluate the Dirac optical potential for neutrons and protons in asymmetric nuclear matter. From the resulting Schroedinger-equivalent potential, the high-energy behavior of the nuclear symmetry potential is studied. We find that the symmetry potential at fixed baryon density is essentially constant once the nucleon kinetic energy is greater than about 500 MeV. Moreover, for such a high-energy nucleon, the symmetry potential is slightly negative below a baryon density of about {rho}=0.22 fm{sup -3} and then increases almost linearly to positive values at high densities. Our results thus provide an important constraint on the energy and density dependence of nuclear symmetry potential in asymmetric nuclear matter.
- OSTI ID:
- 20771115
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 72, Issue 6; Other Information: DOI: 10.1103/PhysRevC.72.064606; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
Similar Records
Isospin-dependent properties of asymmetric nuclear matter in relativistic mean field models
Probing the high-density nuclear symmetry energy with the