Mainz 2012 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 20: Struktur und Dynamik von Kernen

HK 20.3: Talk

Tuesday, March 20, 2012, 17:15–17:30, P 4

Isospin symmetry in the sd shell — •Andreas Wendt¹, Peter Reiter¹, and Jan Taprogge² — ¹Institut für Kernphysik, Universität zu Köln — ²CSIC Madrid, Spain

Very neutron deficient sd-shell nuclei may exhibit large distortions of the isospin symmetry. Differences in transition matrix elements between mirror nuclei provide access to changing collective behavior, expected by recent theoretical calculations. For the T=−3/2 isotope ³³Ar matrix elements were deduced from relativistic Coulomb excitation using the PRESPEC setup at GSI. The ³³Ar ions were produced by fragmentation of a high-energy ³⁶Ar beam impinged on a secondary Au target at an energy of ≈150 AMeV. Gamma-rays were observed by the Ge Cluster detectors of the PRESPEC setup and recorded together with particle information obtained with LYCCA. The B(E2) values of ^33,36Ar will be compared to results of new shell model calculations.

Supported by the German BMBF (06KY9136 TP7+TP1) and by the "Helmholtz Graduate School for Hadron and Ion Research (HGS-HIRe)".