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HK: Fachverband Physik der Hadronen und Kerne

HK 7: Theorie

HK 7.6: Vortrag

Montag, 10. März 2008, 15:30–15:45, 2F

Relativistic Quasiparticle Random Phase Approximation in Exotice Nuclei — •Daniel Pena¹, John Daoutidis¹, George A. Lalazissis², and Peter Ring¹ — ¹Physikdepartment TU München, James Franck Str. 1, 85748 Garching — ²Aristotle University of Thessaloniki, Thessaloniki, Greece

Covariant density functional theory is used to study the influence of electromagnetic radiation on nuclei far from stability. The relativistic Hartree-Bogoliubov equations and the resulting equations for the quasiparticle random phase approximation are solved for spherical as well as for axially symmetric systems in a fully self-consistent way. Three different kinds of high precision energy functionals are investigated and special care is taken for the decoupling of the Goldstone modes. This allows the microscopic investigation of the giant dipole mode and giant monopole modes in spherical and deformed nuclei. We also investigate low-lying modes such as the pygmy modes in deformed neutron rich Ne- and Mo-isotopes as well as scissor like resonances in deformed nuclei. Excellent agreement with recent experiments is found and new types of modes are predicted for deformed systems with large neutron excess.