Naslov
Dynamics of Exotic Nuclear Systems: Covariant QRPA and Extensions

Autori
Ring, Peter ; Litvinova, Elena ; Nikšić, Tamara ; Paar, Nils ; Pena Arteaga, D ; Tselyaev, V.I. ; Vretenar, Dario

Izvornik
Nuclear Physics A (0375-9474) 788 (2007), 1-4; 194-201

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

Ključne riječi
relativistic QRPA; giant resonances; beyond the mean field approximation; damping mechanism

Sažetak
Quasiparticle Random Phase Approximation (QRPA) based on covariant density functional theory provides a universal and self- consistent description of collective and noncollective excitations in nuclei. So far is was only possible to investigate spherical nuclei and all the investigations have been restricted to 1p-1h (or two-quasiparticle) configurations. We report on recent progress in this field: (i) we perform fully self-consistent axially deformed QRPA calculations in the framework of relativistic models with nonlinear meson couplings and (ii) we go beyond the mean field approximation and use the collective phonons obtained in relativistic QRPA to construct dressed particle and hole configurations. This leads to an enhancement of the level density in the neighborhood of the Fermi surface and to an increasing fragmentation of the giant resonances. This allows a microscopic description of the corresponding damping mechanism.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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