Hannover 2013 – wissenschaftliches Programm
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MS: Fachverband Massenspektrometrie
MS 2: Precision Mass Spectrometry and Fundamental Applications II
MS 2.3: Vortrag
Montag, 18. März 2013, 14:45–15:00, F 442
Precision mass measurements of exotic Calcium isotopes using ISOLTRAP’s multi-reflection time-of-flight (MR-ToF) mass spectrometer — •Frank Wienholtz1, Dietrich Beck2, Klaus Blaum3, Christopher Borgmann3, Martin Breitenfeldt4, R. Burcu Cakirli3,5, Sebastian George1, Frank Herfurth2, Jason D. Holt6,7, Magdalena Kowalska8, Susanne Kreim3,8, David Lunney9, Vladimir Manea9, Javier Menendez7,6, Denis Neidherr2, Marco Rosenbusch1, Lutz Schweikhard1, Achim Schwenk7,6, Johannes Simonis6,7, Juliane Stanja10, Robert Wolf1, and Kai Zuber10 — 1Ernst-Moritz-Arndt-Universität, Institut für Physik, 17487 Greifswald, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 3Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 4Katholieke Universiteit,3000 Leuven, Belgium — 5University of Istanbul, Istanbul, Turkey — 6Institut für Kernphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany — 7ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 8CERN, CH-1211 Geneva, Switzerland — 9CSNSM-IN2P3-CNRS, Université Paris-Sud, Orsay, France — 10Institut für Kern- und Teilchenphysik, Technische Universität Dresden, 01069 Dresden, Germany
State-of-the-art precision measurements on radioactive ions have been performed with the Penning-trap mass spectrometer ISOLTRAP at CERN. Minute production rates often accompanied by huge isobaric background and millisecond half-lives pose enormous challenges on the experimental setup and often require new experimental techniques. The ISOLTRAP setup has recently been enhanced with an electrostatic mirror ion trap acting as a multi-reflection time-of-flight mass separator (MR-ToF MS) for beam purification. It can likewise be used as a spectrometer in combination with a suitable detector increasing the mass-measurement capability of ISOLTRAP considerably. The measurements on the calcium isotopic chain will be presented together with the nuclear structure they reveal. The measurements up to 54Ca are compared with predictions from models that utilize three-body nuclear forces.