Dresden 2013 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 76: Struktur und Dynamik von Kernen

HK 76.5: Vortrag

Donnerstag, 7. März 2013, 18:00–18:15, HSZ-301

Spectroscopy of Open-Shell Nuclei with Normal-Ordered 3N Interactions — •Eskendr Gebrerufael, Robert Roth, Joachim Langhammer, and Angelo Calci — Institut für Kernphysik, Technische Universität Darmstadt

The inclusion of three-nucleon (3N) interactions, that are important to understand the structure of nuclei, is still a challenging task in ab-initio nuclear-structure calculations, because of the tremendous computational cost.

We have shown that normal ordering with respect to a single-reference state provides a helpful tool to derive an approximate lower-particle-rank form of any 3N interaction. This approximation, however, is limited to closed-shell nuclei. We now extend the normal-ordering approximation to open-shell systems using a multi-determinantal reference state, i.e. a linear combination of single Slater determinants.

For the first time, we present spectra for p-shell nuclei, e.g. ⁶ Li and ¹⁰B, calculated in importance-truncated no-core shell model using chiral 3N interactions in normal-order approximation with respect to a multi-determinantal reference state. We compare them to calculations using full 3N interactions, and go beyond model-space sizes that can be handled with full 3N interactions.

Supported by DFG (SFB 634), HIC for FAIR, and BMBF 06DA7047I