Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 43: Instrumentation XI
HK 43.4: Vortrag
Mittwoch, 16. März 2016, 17:30–17:45, S1/01 A3
Half-life and Mass Measurement of the short-lived 215Po Isotope (1.78ms) at the FRS Ion Catcher — •Ann-Kathrin Rink1, Samuel Ayet San Andres1,2, Julian Bergmann1, Timo Dickel1,2, Jens Ebert1, Hans Geissel2, Christine Hornung1, Ivan Miskun1, Wolfgang R. Plass1,2, Sivaji Purushothaman2, Moritz P. Reiter1, and Christoph Scheidenberger1,2 — 1Justus-Liebig Universität Gießen — 2GSI, Darmstadt
At the Low-Energy Branch (LEB) of the Super-FRS at FAIR, precision experiments with exotic nuclei will be performed using ion traps and lasers. The nuclei will be produced at relativistic energies, slowed down, thermalised in a cryogenic stopping cell (CSC) and made available to various experiments. The thermalisation is a challenging task because of the large energy straggling of the nuclei after production, which requires a stopping cell with large areal densities. Also, the process needs to be performed on a millisecond time scale in order to give access to short-lived nuclides. This method has already been successfully applied at the FRS Ion Catcher at GSI using a prototype CSC. Recently the potential of the method has been demonstrated by the mass and half-life measurement of the 215Po nuclide with a half-life of 1.78 ms only. The multiple-reflection time-of-flight mass spectrometer at the FRS Ion Catcher has been used to determine the mass to a sub-ppm accuracy and to provide a mass-selected beam for alpha spectroscopy. Furthermore, experiments have been performed with the prototype CSC in order to test novel concepts to be used with the final version of the CSC for the LEB.