Darmstadt 2008 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 50: Kernphysik / Spektroskopie II
HK 50.1: Gruppenbericht
Freitag, 14. März 2008, 14:00–14:30, 2G
Structure and reactions of light nuclei in the Fermionic Molecular Dynamics approach — •Thomas Neff1, Hans Feldmeier1, Sonia Bacca1, Robert Cussons1, Ramin Torabi1, Benjamin Hellwig1, and Robert Roth2 — 1GSI, Darmstadt — 2Institut für Kernphysik, TU Darmstadt
Light nuclei show a wealth of exotic phenomena like clustering and halos. We aim at a consistent description of light nuclei in the Fermionic Molecular Dynamics (FMD) approach, a microscopic many-body model that uses Slater determinants built with Gaussian wave packets as basis states. We employ an effective interaction derived from the realistic Argonne V18 interaction by explicitly implementing short-range central and tensor correlations using the Unitary Correlation Operator Method.
We will show results for nuclei in the p- and sd-shell, looking at binding energies, spectra, charge and matter radii, electromagnetic and weak transitions. The FMD wave functions can be analyzed with respect to clustering and shell model occupations. The structure of 12C will be analyzed in detail with a special emphasis on the Hoyle and other cluster states. The implementation of resonance and scattering boundary conditions also allow us to study low-energy nuclear reactions like the radiative capture reaction 3He(α,γ)7Be.