Continuum random-phase approximation for relativistic point coupling models

Journal Article · Sat Aug 15 00:00:00 EDT 2009 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.80.024309· OSTI ID:21290047

Daoutidis, J; Ring, P ^[1]

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1. Physik-Department der Technischen Universitaet Muenchen, D-85748 Garching (Germany)

Continuum relativistic random-phase approximation (CRPA) is used to investigate collective excitation phenomena in several spherical nuclei along the periodic table. We start from relativistic mean-field calculations based on a covariant density functional with density-dependent zero-range forces. From the same functional an effective interaction is obtained as the second derivative with respect to the density. This interaction is used in relativistic CRPA calculations for the investigation of isoscalar monopole, isovector dipole, and isoscalar quadrupole resonances of spherical nuclei. In particular we study the low-lying E1 strength in the vicinity of the neutron evaporation threshold. The properties of the resonances, such as centroid energies and strengths distributions are compared with results of discrete RPA calculations for the same model as well as with experimental data.

• OSTI ID: 21290047
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 80, Issue 2; Other Information: DOI: 10.1103/PhysRevC.80.024309; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLLECTIVE EXCITATIONS
COMPUTERIZED SIMULATION
COUPLING
DENSITY
DENSITY FUNCTIONAL METHOD
DIPOLES
DISTRIBUTION
INTERACTIONS
ISOVECTORS
MEAN-FIELD THEORY
MONOPOLES
NEUTRON EMISSION
NUCLEI
RANDOM PHASE APPROXIMATION
RELATIVISTIC RANGE
RESONANCE
SPHERICAL CONFIGURATION