Hannover 2010 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 5: Präzisionsmassenspektrometrie und Anwendungen I

MS 5.2: Hauptvortrag

Mittwoch, 10. März 2010, 14:30–15:00, F 428

Mass measurements on neutron-rich fission products and actinoids at Triga-Trap — •J. Ketelaer1, T. Beyer2,3, M. Block4, K. Eberhardt1, M. Eibach1,3, F. Herfurth4, Sz. Nagy2,4, C. Smorra1,3, W. Nörtershäuser1,4, and K. Blaum2,31Johannes Gutenberg-Universität, 55128 Mainz — 2Max-Planck-Institut für Kernphysik, 69117 Heidelberg — 3Ruprecht-Karls-Universität, 69117 Heidelberg — 4GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt

The double Penning trap mass spectrometer Triga-Trap has been installed at the research reactor Triga Mainz to perform high-precision mass measurements on neutron-rich fission products and actinoids. Masses of these nuclides are important for nuclear structure studies of heavy elements, tests of mass models, and nucleosynthesis calculations of the astrophysical r-process. Ions of many stable isotopes as well as carbon clusters for calibration purposes can be produced by a non-resonant laser ablation ion source, allowing off-line mass measurements independently from the research reactor. Besides the physics program, Triga-Trap serves as a test bench for the development of new ion detection techniques, which will enable mass measurements on single stored singly-charged ions with a half-life in the order of one second. To this end, a unique combination of the commonly used destructive time-of-flight technique and the non-destructive image current detection method is employed here in an on-line mass spectrometer for short-lived nuclides. First time-of-flight mass measurements on rare earth elements and actinoids will be reported.

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