Naslov
Relativistic description of nuclear structure: models with density-dependent meson-nucleon couplings

Autori
Nikšić, Tamara

Vrsta, podvrsta i kategorija rada
Ocjenski radovi, doktorska disertacija

Fakultet
Prirodoslovno-matematički fakultet

Mjesto
Zagreb

Datum
02.04

Godina
2004

Stranica
127

Mentor
Vretenar, Dario

Ključne riječi
relativistic mean-field theory; effective Lagrangian; giant resonances; relativistic quasiparticle random phase approximation

Sažetak
The relativistic Hartree-Bogoliubov (RHB) and the relativistic RPA/QRPA models are extended to include effective interactions with density-dependent meson-nucleon coupling functions. The effective Lagrangian is characterized by a phenomenological density dependence for the $\sigma$, $\omega$ and $\rho$ meson-nucleon vertex functions, adjusted to properties of nuclear matter and finite nuclei. Pairing correlations are described by the pairing part of the finite range Gogny interaction. The new density-dependent effective interaction DD-ME1 is tested in the analysis of the equations of state for symmetric and asymmetric nuclear matter, of ground-state properties of the Sn and Pb isotopic chains, and deformed the rare-earth nuclei. Results of self-consistent RHB calculations are compared with experimental data, and with results previously obtained in the RHB model with non-linear meson self-interactions. The matrix equations of the relativistic random phase approximation (RRPA) are derived for an effective Lagrangian characterized by density-dependent meson-nucleon vertex functions. The comparison of the RRPA results on multipole giant resonances with experimental data constrains the parameters that characterize the isoscalar and isovector channel of the density-dependent effective interactions, and restrict the range of values of the nuclear matter compression modulus and nuclear matter symmetry energy at saturation.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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