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HK: Physik der Hadronen und Kerne

HK 9: Poster Session: Theory

HK 9.18: Poster

Dienstag, 12. März 2002, 10:30–12:45, Foyer Chemie

Collective dynamics in selfconsistent Mean-Field-Models — •Patrick Fleischer and Paul-Gerhard Reinhard — Institut fuer theoretische Physik II, Universitaet Erlangen-Nuernberg, Staudtstr. 7, 91058 Erlangen, Germany

The low-energy dynamics of nuclei are dominated by rotations and surfacevibrations. Exotic nuclei often show very soft potential-energy-surfaces (PEF) for these vibration-modes. The low energy spectra provide important information about the underlying PEF.

We present results of theoretical low energy spectra calculations. The basis of the description is the selfconistent Skyrme-Hartree-Fock-Method. The PEF are unfolded by using a quadrupole constraint. The collective masses (and zero point energies corrections) are calculated with selfconsistent cranking. Using the PEF together with the masses one can calculate the excitation spectra with a collective Bohr Hamiltonian.

We consider the trends of quadrupol excitations in light exotic nuclei (S, Mg). We investigate heavy neutrondeficient nuclei having strong formisomers which lead to dense monopole states. Further on we calculate the two nucleon gaps of magic nuclei (Sn, Pb). We compare results of different available Skyrme-Forces. The trends of these forces are quite similar but they show big differences in quantitative details.