Darmstadt 2008 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 34: Postersitzung
HK 34.67: Poster
Thursday, March 13, 2008, 14:00–16:00, Poster C3
Systematics of Nuclear Masses and Low-Lying Collective States — •Jochen Erler1, Peter Klüpfel1, Paul-Gerhard Reinhard1, and Joachim Maruhn2 — 1Institut für Theoretischen Physik II, Universität Erlangen-Nürnberg — 2Institut für Theoretische Physik, Universität Frankfurt
Self-consistent nuclear mean-field models (Skyrme-Hartree-Fock (SHF), relativistic mean field, Gogny force) provide a reliable and very efficient tool for computing nuclear ground state properties throughout the whole isotopic table. The enormous success of these models has led to a regime somewhat outside of a pure mean-field picture:
Collective phenomena require a beyond mean-field treatment of collective correlations. The Generator Coordinate Method (GCM) can be applied to map a microscopic hamiltonian into a collective Schrödinger equation to include binding effects from low-energy collective modes.
During the last decades advanced fitting strategies and a proper description of low-energy collective dynamics ("cranking") facilitated a continuous improvement of the quality of the effective nuclear interaction.
Our large scale SHF + GCM calculations with a variety of parametrisations and pairing models illustrate the steady increase of the predictive power of those phenomenologic forces. In contrast to the early parametrisations modern forces in combination with a beyond mean-field model enable a nearly trendless reproduction of nuclear masses and low-lying collective states allover the chart of nuclei.