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

N. Paar, P. Ring, T. Nikšić, and D. Vretenar
Phys. Rev. C 67, 034312 – Published 24 March 2003
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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.

  • Received 2 December 2002

DOI:https://doi.org/10.1103/PhysRevC.67.034312

©2003 American Physical Society

Authors & Affiliations

N. Paar and P. Ring

  • Physik-Department der Technischen Universität München, D-85748 Garching, Germany

T. Nikšić and D. Vretenar

  • Physics Department, Faculty of Science, University of Zagreb, Croatia
  • Physik-Department der Technischen Universität München, D-85748 Garching, Germany

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Vol. 67, Iss. 3 — March 2003

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