Rostock 2019 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 2: Precision Mass Spectrometry
MS 2.3: Talk
Monday, March 11, 2019, 14:45–15:00, U A-Esch 2
Recent Developments at the FRS Ion Catcher — •Christine Hornung1, Daler Amanbayev1, Samuel Ayet1,2, Sönke Beck1, Julian Bergmann1, Timo Dickel1,2, Hans Geissel1,2, Florian Greiner1, Lizzy Gröf1, Gabriella Kripko-Koncz1, Ivan Miskun1, Wolfgang Plaß1,2, Christoph Scheidenberger1,2, and the FRS Ion Catcher Collaboration1 — 1II. Physikalisches Institut, Justus-Liebig-Universität Gießen, Gießen, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
At the FRS Ion Catcher at GSI/FAIR, projectile and fission fragments are produced at relativistic energies at the FRS, separated in-flight, range-focused, slowed-down and thermalized in a cryogenic stopping cell (CSC) and transmitted to a multiple-reflection time-of-flight mass spectrometer (MR-TOF-MS). With the MR-TOF-MS direct mass measurements of more than 30 exotic nuclei were performed, achieving mass accuracies down to 6E-8. These precision measurements show the need to improve current mass models for nuclei in the vicinity of the doubly magic nucleus 208Pb.
The FRS Ion Catcher was also used to measure half-lives and branching ratios with a novel technique. This has been tested with the short-lived α-emitting nuclide 216Po and for the second excited state of 119Sb. These results and recent technical upgrades of the RFQ beamline, connecting the CSC with the MR-TOF-MS, (an RFQ switch yard, a calibration source and a dedicated RFQ mass filter) will be presented.