Quasiparticle random phase approximation based on the relativistic Hartree-Bogoliubov model

Paar, Nils and Ring, Peter and Nikšić, Tamara and Vretenar, Dario (2003) Quasiparticle random phase approximation based on the relativistic Hartree-Bogoliubov model. Physical Review C, 67 (3). pp. 34312-15. ISSN 0556-2813

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Abstract

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.

Item Type: Article
Keywords: forces in hadronic systems and effective interactions, Hartree-Fock and random-phase approximations, giant resonances
Date: March 2003
Subjects: NATURAL SCIENCES > Physics > Nuclear Physics
Additional Information: Copyright (2003) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 0119250
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 23 May 2014 13:36
Last Modified: 23 May 2014 13:36
URI: http://digre.pmf.unizg.hr/id/eprint/1657

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