Hannover 2016 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 11: Accelerator Mass Spectrometry and Applications III
MS 11.4: Vortrag
Freitag, 4. März 2016, 12:00–12:15, f128
A dedicated AMS setup for 53Mn and 60Fe at the Cologne FN Tandem Accelerator — •Markus Schiffer, Alfred Dewald, Richard Altenkirch, Claus Feuerstein, Claus Müller-Gatermann, Stefan Heinze, Prachanda Bhandari, Gereon Hackenberg, Alexander Stolz, and Gregor Zitzer — University of Cologne, Institute for Nuclear Physics, Germany
Following demands for AMS measurements of medium mass isotopes, especially for 53Mn and 60Fe, we started to build a dedicated AMS setup at the Cologne FN Tandem accelerator. This accelerator with a maximum terminal voltage of 10 MV can be reliably operated at a terminal voltage of 9.5 MV which corresponds to energies of 95-100 MeV for 60Fe or 53Mn beams using the 9+ or 10+ charge state. These charge states can be obtained by foil stripping with efficiencies of 30% and 20%, respectively. With second foil stripping we can increase the energy to 130 MeV.
The suppression of the stable isobars 60Ni and 53Cr will be done by (dE/dx) techniques using combinations of energy degrader foils and dispersive elements like an electrostatic analyzer and a time of flight (TOF) system in combination with a gas filled magnet and a focal plane detector.
In this contribution we will report on details of the setup and the expected features of the new AMS system. Especially the first results of efficiency, transmission and background will be presented.
Supported by the DFG and the Excellence Initiative of the University Cologne, Emerging Group ULDETIS.