Nuclear matter symmetry energy from generalized polarizabilities: Dependences on momentum, isospin, density, and temperature
- Instituto de Fisica, Universidade de Sao Paulo, C.P. 66.318, CEP 05315-970, Sao Paulo-SP (Brazil)
Symmetry energy terms from macroscopic mass formulas are investigated as generalized polarizabilities of nuclear matter. Besides the neutron-proton (n-p) symmetry energy, the spin-dependent symmetry energies and a scalar one are also defined. They depend on the nuclear densities ({rho}), neutron-proton asymmetry (b), temperature (T), and exchanged energy and momentum (q). Based on a standard expression for the generalized polarizabilities, a differential equation is proposed to constrain the dependence of the symmetry energy on the n-p asymmetry and on the density. Some solutions are discussed. The q dependence (zero frequency) of the symmetry energy coefficients with Skyrme-type forces is investigated in the four channels of the particle-hole interaction. Spin-dependent symmetry energies are also investigated indicating much stronger differences in behavior with q for each Skyrme force than the results for the neutron-proton one.
- OSTI ID:
- 20698731
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 71, Issue 6; Other Information: DOI: 10.1103/PhysRevC.71.064303; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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