Momentum, density, and isospin dependence of symmetric and asymmetric nuclear matter properties
- Institut fuer Theoretische Physik, Universitaet Tuebingen, Auf der Morgenstelle 14, D-72076 Tuebingen (Germany)
Properties of symmetric and asymmetric nuclear matter have been investigated in the relativistic Dirac-Brueckner-Hartree-Fock approach based on projection techniques using the Bonn A potential. The momentum, density, and isospin dependence of the optical potentials and nucleon effective masses are studied. It turns out that the isovector optical potential depends sensitively on density and momentum, but is almost insensitive to the isospin asymmetry. Furthermore, the Dirac mass m{sub D}* and the nonrelativistic mass m{sub NR}* which parametrizes the energy dependence of the single particle spectrum, are both determined from relativistic Dirac-Brueckner-Hartree-Fock calculations. The nonrelativistic mass shows a characteristic peak structure at momenta slightly above the Fermi momentum k{sub F}. The relativistic Dirac mass shows a proton-neutron mass splitting of m{sub D,n}*<m{sub D,p}* in isospin asymmetric nuclear matter. However, the nonrelativistic mass has a reversed mass splitting m{sub NR,n}*>m{sub NR,p}* which is in agreement with the results from nonrelativistic calculations.
- OSTI ID:
- 20771156
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 72, Issue 6; Other Information: DOI: 10.1103/PhysRevC.72.065803; (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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