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HK: Fachverband Physik der Hadronen und Kerne

HK 48: Structure and Dynamics of Nuclei IX

HK 48.3: Talk

Thursday, March 1, 2018, 14:30–14:45, HZO 70

Electromagnetic transition rates in 21O — •Sebastian Heil1, Marina Petri2, and Thomas Aumann1,31TU Darmstadt, Germany — 2University of York, UK — 3GSI Helmholtzzentrum

Experimental studies of electromagnetic transition rates in neutron-rich nuclei are very important for testing NN+3N calculations. The case of 21O is particularly interesting because calculations show that the transition strengths from the first 1/2+ and second 3/2+ excited states to the ground state 5/2+ will discriminate between the NN+3N and USDB interactions.

An experiment at NSCL was performed, producing 21O. The usage of the TRIPLEX plunger allows the determination of the lifetime of the state of interest. The S800 spectrometer and GRETINA were used for the fragment identification and gamma-ray detection. This presentation will report on the experiment as well as the current status of the analysis.

This work was supported by the DFG within the framework of the SFB 1245 and by HIC for FAIR within the framework of the LOEWE program launched by the State of Hesse.

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