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HK: Fachverband Physik der Hadronen und Kerne
HK 49: Poster
HK 49.18: Poster
Thursday, March 15, 2007, 16:00–17:00, P
Microscopic Theory of Collective Motion – Effects of Dynamical Response — •Peter Klüpfel1, Niels Schindzielorz1, Paul-Gerhard Reinhard1, Thomas Bürvenich2, and Joachim Maruhn3 — 1Inst. f. Theor. Physik, Univ. Erlangen, Erlangen/Germany — 2Frankfurt Inst. f. Advanced Studies, Frankfurt/Germany — 3Inst. f. Theor. Physik, Univ. Frankfurt, Frankfurt/Germany
Self-consistent mean-field models provide an excellent description of nuclear bulk properties over the whole table of isotopes. Going to a description beyond the pure mean-field it is even possible to deal with collective phenomena like low energy excitations or fission. The generator coordinate method (GCM) is the appropriate tool to provide a microscopic description of these low-energy collective phenomena.
The GCM relies on a coherent superposition of mean-field states and the success depends on the choice of the basis. Collective motion breaks time-reversal symmetry and it is plausible that a good basis should embrace also the dynamical response of the mean field. This is the "cranking" method.
We studied the effects of different cranking models (static GCM, Inglis- and ATDHF-cranking) on collective observables as separation energies, isotope shifts, low-ying excitations and fission.