Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 41: Structure and Dynamics of Nuclei VI

HK 41.1: Group Report

Thursday, March 30, 2017, 14:00–14:30, F 2

Recent Results From the FRS Ion Catcher — •Samuel Ayet San Andrés for the FRS Ion Catcher collaboration — GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany — Justus Liebig Universität, Gießen, Germany

At the Super-FRS, exotic nuclei far from stability will be produced and separated in-flight at relativistic energies. At the Low-Energy-Branch (LEB) of the Super-FRS, the ions will be slowed down, thermalized in a cryogenic stopping cell (CSC), extracted and transferred to the experiments MATS and LASPEC where high precision mass measurement of short-lived nuclei and laser spectroscopy will be performed.

The prototype of the CSC and a multiple-reflection time-of-flight mass spectrometer have been developed and commissioned recently as part of the FRS Ion Catcher experiment with fragments of ²³⁸U and ¹²⁴Xe beams. The masses of more than 30 nuclides have been measured with accuracies down to the low 10^-7 level, 7 of them directly measured for the first time. More than 15 isomers were observed with excitation energies down to few hundreds of keV. An overview of the latest developments, results and an outlook on the near future of the FRS Ion Catcher will be given.