Instabilities in asymmetric nuclear matter
- Departamento de Fisica, CFM, Universidade Federal de Santa Catarina, Florianopolis, SC-CP. 476-CEP 88.040-900 (Brazil)
- Centro de Fisica Teorica, Departamento de Fisica, Universidade de Coimbra, Coimbra 3000-516 (Portugal)
The existence of phase transitions from liquid to gas phases in asymmetric nuclear matter (ANM) is related with the instability regions which are limited by the spinodals. In this work we investigate the instabilities in ANM described within relativistic mean field hadron models, both with constant and density dependent couplings at zero and finite temperatures. In calculating the proton and neutron chemical potentials we have used an expansion in terms of Bessel functions that is convenient at low densities. The role of the isovector scalar {delta}-meson is also investigated in the framework of relativistic mean field models and density dependent hadronic models. It is shown that the main differences occur at finite temperature and large isospin asymmetry close to the boundary of the instability regions.
- OSTI ID:
- 20695610
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 70, Issue 1; Other Information: DOI: 10.1103/PhysRevC.70.015203; (c) 2004 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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