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HK: Fachverband Hadronen und Kerne
HK 67: Poster Session
HK 67.37: Poster
Thursday, March 19, 2009, 14:00–16:00, Audi-Max
The two-fermions – four-bosons nucleus 198Hg within the extended supersymmetry description — •Christian Bernards, Christoph Fransen, Stefan Heinze, Jan Jolie, and Désirée Radeck — Institute for Nuclear Physics, University of Cologne
Low-energy excitations of heavy even-even nuclei can be described well using the Interacting Boson Model (IBM) [1]. The supersymmetric extension of the IBM uses a symmetry between fermions and bosons and has already been successfully applied to describe low-energy excitations in the Au-Pt mass region.
Using the Interacting Boson Fermion Fermion Model (IBFFM) predictions for 198Hg have been derived in [2], considering two j = 3/2 proton fermions and four neutron bosons with respect to the 208Pb shell closure. Referring to [3], this IBFFM configuration should describe excited two-quasiparticle and not low-lying 198Hg states. We show that an equivalent description for 198Hg can be achieved within the IBM-2 and that new experimental data shows quite a good matching to the theoretical predictions – also for the low-energy states.
[1] F. Iachello and A. Arima. The Interacting Boson Model. Cambridge University Press, 1987.
[2] J. Jolie. The Interacting Boson-Fermion Model: Bose-Fermi Symmetries and Supersymmetries. PhD thesis, University of Gent, 1986.
[3] F. Iachello and P. Van Isacker The Interacting Boson Fermion Model. Cambridge University Press, 1991.