Heidelberg 2015 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Invited Talks 3

HK 39.3: Hauptvortrag

Mittwoch, 25. März 2015, 12:20–13:00, T/HS1

Precision Experiments with Slowed-down and Thermalized Projectile and Fission Fragments — •Wolfgang Plaß — II. Physikalisches Institut, Justus-Liebig-Universität Gießen — GSI Helmholtzzentrum für Schwerionenforschung GmbH

Novel precision experiments with exotic nuclei will be enabled using the combination of the in-flight separation method with modern techniques for efficiently slowing-down, thermalizing and manipulating projectile and fission fragments produced at relativistic energies. Two key devices for this approach have been developed for the Low Energy Branch of the Super-FRS at FAIR: A cryogenic stopping cell and a multiple-reflection time-of-flight mass spectrometer. They have recently been commissioned as part of the FRS Ion Catcher experiment at GSI and first measurements have been performed. The reach to rare (few ions per hour) and very short-lived (half-lives of a few milliseconds) nuclides produced at the FRS at 1000 MeV/u has been demonstrated. The potential of the mass spectrometer as a versatile and efficient tool for the study of isomers and the production of isobarically and isomerically pure beams has been shown. Envisaged applications include the direct mass measurements of very rare nuclides and the decay spectroscopy of pure ion samples. In addition, application of these developments in analytical mass spectrometry opens up completely new possibilities for in-situ studies e.g. in climate or environmental research, medicine and safety.