Research output: Contribution to journal › Article › peer-review
Dynamics of Exotic Nuclear Systems : Covariant QRPA and Extensions. / Ring, P.; Litvinova, E.; Nikšić, T.; Paar, N.; Peña Arteaga, D.; Tselyaev, V. I.; Vretenar, D.
In: Nuclear Physics A, Vol. 788, No. 1-4, 15.05.2007, p. 194-201.Research output: Contribution to journal › Article › peer-review
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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 -
ID: 74234925