TY - JOUR

T1 - Dynamics of Exotic Nuclear Systems

T2 - 2nd International Conference on Collective Motion in Nuclei Under Extreme Conditions

AU - Ring, P.

AU - Litvinova, E.

AU - Nikšić, T.

AU - Paar, N.

AU - Peña Arteaga, D.

AU - Tselyaev, V. I.

AU - Vretenar, D.

N1 - Funding Information: This work has been supported in part by the Bundesministerium für Bildung und Forschung, by the Alexander von Humboldt-Stiftung, by the Deutsche Forschungsgemein-schaft, and by the Russian Foundation for Basic Research. Copyright: Copyright 2007 Elsevier B.V., All rights reserved.

PY - 2007/5/15

Y1 - 2007/5/15

N2 - 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.

AB - 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.

KW - MEAN-FIELD-THEORY

KW - HARTREE-BOGOLIUBOV THEORY

KW - FINITE NUCLEI

KW - EXCITATIONS

UR - http://www.scopus.com/inward/record.url?scp=34247880435&partnerID=8YFLogxK

U2 - 10.1016/j.nuclphysa.2007.01.082

DO - 10.1016/j.nuclphysa.2007.01.082

M3 - Article

VL - 788

SP - 194

EP - 201

JO - Nuclear Physics A

JF - Nuclear Physics A

SN - 0375-9474

IS - 1-4

Y2 - 20 June 2006 through 23 June 2006

ER -