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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.