Dresden 2013 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

HK: Fachverband Physik der Hadronen und Kerne

HK 76: Struktur und Dynamik von Kernen

HK 76.7: Vortrag

Donnerstag, 7. März 2013, 18:30–18:45, HSZ-301

Importance-Truncated Large-Scale Shell Model — •Christina Stumpf and Robert Roth — Institut für Kernphysik, Technische Universität Darmstadt

The (valence-space) shell model is a successful tool for the spectroscopic description of medium-mass and heavy nuclei. Shell-model calculations require the computation and diagonalization of huge Hamilton matrices for large-scale model spaces. We apply an importance-truncation scheme with an importance measure derived from perturbation theory to the shell model in order to reduce the model spaces to those basis states that are relevant for the description of a few target eigenstates. In this way, we extend the applicability to valence spaces and nuclei beyond the reach of the conventional shell model.

We benchmark ground-state and excitation energies as well as transition strengths of ⁵⁶Ni obtained in the importance-truncated pf-shell model space and compare them to results obtained in standard shell-model calculations. Furthermore, we present results for ⁶⁴Ge in a full pfg_{9−3mu/−2mu2} valence space, which is not accessible in the conventional shell model.

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