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

Autori
Paar, Nils ; Ring, Peter ; Nikšić, Tamara ; Vretenar, Dario

Izvornik
Physical review. C, Nuclear physics (0556-2813) 67 (2003), 3/04312; 1-15

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Forces in hadronic systems and effective interactions; Hartree-Fock and random-phase approximations; Giant resonances

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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