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HK: Fachverband Physik der Hadronen und Kerne

HK 9: Struktur und Dynamik von Kernen II

HK 9.2: Vortrag

Montag, 21. März 2011, 17:00–17:15, O-1

Investigation of Octupole Vibrational States in ¹⁴⁶Sm — •Carolin Küppersbusch, Michael Elvers, Janis Endres, and Andreas Zilges — Institut für Kernphysik, Universität zu Köln

The even-even nucleus ¹⁴⁶Sm has spherical shape because of its proximity to the neutron shell closure at N=82. The lowest energy levels in those nuclei are usually interpreted to be collective vibrational excitations. However, it is still unresolved to what extent energy levels with higher spin can be described as a coupling of vibrational phonons in consideration of multipole-multipole interactions.
The fusion evaporation reaction ¹⁴⁴Nd(α,2nγ)¹⁴⁶Sm was performed at the tandem accelerator of the IFIN HH in Bucharest-Magurele, Rumania. The γ rays were detected using a detector array consisting of 8 high-purity germanium detectors. By means of the coincidence technique and complemented by the data of an early experiment at the tandem accelerator at the IKP in Cologne the level scheme could be extended. Experimental results and their physical interpretation will be presented.
Supported by the DFG (ZI 510/4-1) and by the Bonn-Cologne Graduate School of Physics and Astronomy.