Darmstadt 2008 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 34: Postersitzung
HK 34.79: Poster
Thursday, March 13, 2008, 14:00–16:00, Poster C3
Nuclear Structure with a Finite-Range Three-Body Interaction — •Anneke Zapp, Robert Roth, and Heiko Hergert — Institut für Kernphysik, TU Darmstadt
We perform nuclear structure calculations including a phenomenological finite-range three-body interaction. Starting from the realistic Argonne v18 potential, the Unitary Correlation Operator Method (UCOM) is applied to derive the correlated interaction VUCOM which incorporates the dominant short-range central and tensor correlations. This interaction is applied in various many-body methods like Hartree-Fock and Many-Body Perturbation Theory to calculate nuclei over the whole nuclear chart. The experimental results are well reproduced, but at some points systematic deviations are observed. The charge radii are too small for all calculated nuclei, for example. This phenomenon can be explained by the neglected influence of residual three-body forces. First investigations with a repulsive three-body contact-interaction have already improved the description. Currently, the contact interaction is replaced by a three-body interaction with finite range, which can also be applied in many-body calculations beyond the mean-field level.
Work supported by the DFG (SFB 634).