Relativistic Hartree-Bogoliubov and QRPA description of exotic nuclear structure
Physics Department, Faculty of Science, University of Zagreb, 10 000, Zagreb, Croatia
2 Physik-Department der Technischen Universität München, D-85748, Garching, Germany
3 Department of Theoretical Physics, Aristotle University of Thessaloniki, GR-54124, Thessaloniki, Greece
4 Dipartimento di Fisica, Universitá di Bologna, and INFN-Bologna, I-40126, Bologna, Italy
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The relativistic Hartree-Bogoliubov (RHB) model is extended to include density-dependent meson-nucleon vertex functions. Compared with standard relativistic mean-field effective interactions with non-linear meson-exchange terms, the density-dependent meson-nucleon couplings provide an improved description of asymmetric nuclear matter, neutron matter and nuclei far from stability. The relativistic quasiparticle random-phase approximation (RQRPA) is formulated in the canonical single-nucleon basis of the relativistic Hartree-Bogoliubov (RHB) model. 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 is employed in the analysis of multipole excitations of neutron-rich oxygen isotopes.
© Società Italiana di Fisica and Springer-Verlag, 2003