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HK: Fachverband Physik der Hadronen und Kerne

HK 34: Postersitzung

HK 34.70: Poster

Donnerstag, 13. März 2008, 14:00–16:00, Poster C3

Fission Half-Lifes of Superheavy Elements in a Microscopic-Collective Model — •Nils Schindzielorz, Peter Klüpfel, and Paul-Gerhard Reinhard — Institut für Theoretische Physik II, Universität Erlangen-Nürnberg

Spontaneous fission is one of the dominant decay modes of superheavy elements. A first indication for the stability of those elements is given by the barrier heights of the Born-Oppenheimer surface along the axially symmetric shapes which is regarded as the fission path. To obtain this surface the Skyrme-Hartree-Fock (SHF) model is uses which gives a self-consistent description of the nucleus with shell-effects. A more sophisticated model of the fission process including dynamic effects is obtained by combination of the WKB-Method and the Generator Coordinate Method (GCM) that allows a microscopic description of the collective phenomenon fission.
The ingredients of the WKB-Method to calculate half-lifes – namely the potential energy surface and the effective mass – are obtained from SHF calculations including the dynamical response of the mean-field.
We compare our results with experimental fission half-lifes of superheavy elements. The systematics for isotopes in the 104<Z<130, 142<N<190 region is presented. For selected isotopes the influence of different Skyrme forces on fission half-lifes is discussed.