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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Structure and Dynamics of Nuclei 9

HK 45.6: Talk

Wednesday, March 25, 2015, 16:15–16:30, T/HS2

Identification of the πp_3/2→πp_1/2 spin-flip transition in ⁸⁵Br at PreSPEC-AGATA — •Christian Stahl¹, Michael Reese¹, Georgi Rainovski², and Norbert Pietralla¹ for the PreSPEC collaboration — ¹Institut für Kernphysik, Technische Universität Darmstadt — ²Faculty of Physics, St. Kliment Ohridski University of Sofia, Bulgaria

We present an experiment performed at GSI’s PreSPEC-AGATA setup aiming at the identification of the πp_3/2→πp_1/2 spin-flip transition in radioactive ⁸⁵Br. A novel experimental technique was employed for the determination of the absolute B(M1) transition strength between the πp_3/2-dominated ground-state and its spin-orbit partner candidate at 1191 keV excitation energy. The technique is based on the comparison of E2 and M1 Coulomb-excitation cross sections at different beam energies by exploiting AGATA’s superb position resolution and the fast beams from GSI’s heavy ion synchrotron. This work was supported by the BMBF under grant No. 06P12RDFN8, the german-bulgarian exchange program under grants No. PPP 50751591 and DNTS/01/2/2011 and by HIC for FAIR.