Frankfurt 2014 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 29: Hauptvorträge II
HK 29.3: Hauptvortrag
Mittwoch, 19. März 2014, 12:20–13:00, HZ 1+2
Faster and further, masses and more: Latest developments and results from ISOLTRAP — •Robert Wolf — Institut für Physik, Universität Greifswald, Felix-Hausdorff-Str. 6, 17489 Greifswald — Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg
Precision mass measurements of radioactive nuclides give direct insight to one of the most fundamental properties of atomic nuclei, their binding energy. Investigating this property as a function of proton and neutron numbers is crucial for advancing theory in describing and predicting the structure of nuclei. Furthermore, knowledge of masses far from stability is necessary for the understanding of nucleosynthesis in supernovae and neutron stars. Laboratory experiments are often extremely challenging due to the short half-lives and low production rates of the nuclides of interest. At the same time, longer-lived or stable contaminations are produced by orders of magnitude more, demanding a high selectivity and resolving power of the mass spectrometer. ISOLTRAP at ISOLDE/CERN has already investigated over 500 isotopes on an uncertainty level down to δ m/m=1 × 10−8 by use of Penning-trap techniques. To extend the range of accessible nuclides even further, the setup has been upgraded with a multi-reflection time-of-flight mass analyzer. This device can be operated as a mass purifier or a mass spectrometer, which allowed mass measurements for nuclear astrophysics applications and tests of valence-shell calculations based on 3N forces. The talk will give an overview of these recent developments and further applications of the new MR-ToF device.