Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2002-12-02
Phys.Rev.C67:034312,2003
Physics
Nuclear Physics
Nuclear Theory
31 pages, RevTeX, 11 ps figures, to be published in Phys. Rev. C
Scientific paper
10.1103/PhysRevC.67.034312
The relativistic quasiparticle random phase approximation (RQRPA) is formulated in the canonical single-nucleon basis of the relativistic Hartree-Bogoliubov (RHB) model. For the interaction in the particle-hole channel effective Lagrangians with nonlinear meson self-interactions are used, and pairing correlations are described by the pairing part of the finite range Gogny interaction. The RQRPA configuration space includes the Dirac sea of negative energy states. Both in the particle-hole and particle-particle channels, the same interactions are used in the RHB calculation of the ground state and in the matrix equations of the RQRPA. The RHB+RQRPA approach is tested in the example of multipole excitations of neutron rich oxygen isotopes. The RQRPA is applied in the analysis of the evolution of the low-lying isovector dipole strength in Sn isotopes and N=82 isotones.
Niksic Tamara
Paar Nils
Ring Peter
Vretenar Dario
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