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HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.38: Poster
Thursday, March 19, 2009, 14:00–16:00, Audi-Max
Fission Half-Lifes of Superheavy Elements in a Microscopic-Collective Model — •Jochen Erler, Nils Schindzielorz, and Paul-Gerhard Reinhard — Institut für Theoretische Physik II, Universität Erlangen-Nürnberg
Spontaneous fission is one of the dominant decay modes of superheavy elements (SHE). We present a large scale survey of barrier heights and life-times for spontaneous fission in the regime of SHE, i.e. nuclei with Z=104-122. This is done on the basis of the Skyrme-Hartree-Fock model which yields the input for a microscopic description, the Generator Coordinate Method (GCM), of the collective phenomenon fission. The actual tunneling probability is estimated by the WKB approximation. To calculate the necessary ingredients namely the collective masses and the corrected potential energy surface self-consistent cranking is used. To explore the possible sensitivity of the fission life-times to the parameterization of the Skyrme force, sufficiently different parameterizations are considered.
These fission life-times are compared with the life-times τα of the α-decay which is a competing decay channel for many SHE. The τα are calculated from the Qα reaction energies using an estimate based on the Viola systematics. Finally, we compare with the β-decay rates of the SHE.