Nuclear collective excitations in a two-phase coexistence region

Journal Article · Fri Apr 15 00:00:00 EDT 2011 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.83.044325· OSTI ID:21499576

Aguirre, R M; De Paoli, A L ^[1]

---

1. Departamento de Fisica, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, and IFLP, CCT-La Plata, CONICET. Argentina (Argentina)

The relation between collective modes and phase transitions in nuclear matter is examined. The dispersion relations for the low-lying excitations in a linear approach are evaluated within a Landau-Fermi liquid scheme by assuming coexisting phases in thermodynamical equilibrium. Temperature and isospin composition are used as relevant parameters. The in-medium nuclear interaction is provided by a recently proposed density functional model. The low density liquid-gas phase transition is taken as a typical situation for examination. We found significative modifications in the energy spectrum, within a certain range of temperatures and isospin asymmetry, due to the separation of matter into independent phases. The influence of the electromagnetic interaction over the dispersion relation of these collective excitations is also examined.

• OSTI ID: 21499576
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 83, Issue 4; Other Information: DOI: 10.1103/PhysRevC.83.044325; (c) 2011 American Institute of Physics; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ASYMMETRY
COLLECTIVE EXCITATIONS
DENSITY
DENSITY FUNCTIONAL METHOD
DISPERSION RELATIONS
ELECTROMAGNETIC INTERACTIONS
ENERGY SPECTRA
EQUILIBRIUM
FERMI GAS
ISOSPIN
LIQUIDS
NUCLEAR MATTER
PHASE TRANSFORMATIONS
THERMODYNAMICS
BASIC INTERACTIONS
CALCULATION METHODS
ENERGY-LEVEL TRANSITIONS
EXCITATION
FLUIDS
INTERACTIONS
MATTER
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
SPECTRA
VARIATIONAL METHODS