Mainz 2017 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 6: Accelerator Mass Spectrometry and Applications I

MS 6.3: Vortrag

Mittwoch, 8. März 2017, 15:15–15:30, RW 2

A dedicated AMS setup for medium mass isotopes at the Cologne FN-Tandem Accelerator — •Markus Schiffer, Richard Altenkirch, Gereon Hackenberg, Claus Müller-Gatermann, Claus Feuerstein, Susan Herb, Alexander Stolz, Marcel Marock, Gregor Zitzer, Stefan Heinze, Mario Cappellazzo, and Alfred Dewald — Institute for Nuclear Physics, University of Cologne, Germany

The new AMS system at the Cologne 10 MV FN accelerator has been finalized in its first stage. The system has been designed for the measurement of medium mass isotopes, especially for ⁵³Mn and ⁶⁰Fe.

In a first test period we have measured the suppression and separation capability of the system with ⁵⁴Cr and ⁵⁴Fe as well as ⁵⁸Fe and ⁵⁸Ni. The achieved suppression is mainly dominated by the energy loss and the energy loss straggling at stacked SiN degrader foils. Further we investigated the performance of the single components, the dispersion of the electrostatic analyzer as well as the resolution of the time of flight system and of the gas ionization detector. It will be shown, that energies of 100 MeV are sufficient for a suppression of ⁶⁰Ni from ⁶⁰Fe down to a ratio of 10⁻¹⁵ nearly without software gates and for the suppression of ⁵³Cr from ⁵³Mn down to a ratio of 10⁻⁸ with a 50% software gate. The final component of our AMS setup, a 135^∘-magnet, designed for gas-filled operation will be installed in spring 2017 and will increase the overall efficiency.

Supported by the DFG and the Excellence Initiative of the University Cologne, Emerging Group ULDETIS.