Berlin 2014 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 3: Precision Mass Spectrometry 2

MS 3.1: Hauptvortrag

Montag, 17. März 2014, 16:30–17:00, DO24 1.205

Precision Measurements with the Multi-Reflection Time-of-Flight Mass Spectrometer of ISOLTRAP at ISOLDE/CERNDinko Atanasov1, Pauline Ascher1, Dietrich Beck2, Christopher Borgmann1, Martin Breitenfeldt3, Christine Böhm1, Burcu Cakirli4, Thomas Elias Cocolios5, Sergey Eliseev1, Tommi Eronen1, Sebastian George1, Frank Herfurth2, Alexander Josef Herlert6, Dmitry Kisler1, Magdalena Kowalska7, Susanne Kreim1,7, Yuri Litvinov2, David Lunney8, Vladimir Manea8, Enrique Minaya Ramirez2, Sarah Naimi1, Dennis Neidherr2, Marco Rosenbusch9, Lutz Schweikhard9, Juliane Stanja10, •Frank Wienholtz9, Robert Wolf9, and Kai Zuber101Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstr. 1, 64291 Darmstadt, Germany — 3Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200d - bus 2418, 3001 Heverlee, Belgium — 4University of Istanbul, Department of Physics, 34134 Istanbul, Turkey — 5University of Manchester, Manchester, United Kingdom — 6FAIR GmbH, Planckstr. 1 , D-64291 Darmstadt, Germany — 7CERN, Geneva 23, 1211 Geneva Switzerland; — 8CSNSM-IN2P3-CNRS, 91405 Orsay Campus, bât. 104, 108, France — 9Ernst-Moritz-Arndt-Universität, Institut für Physik, Felix-Hausdorff-Str. 6, 17487 Greifswald, Germany — 10Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Zellescher Weg 19, 01069 Dresden, Germany

The masses of exotic nuclides are among the most important input parameters for modern nuclear theory and astrophysical models. At the high-precision Penning-trap mass spectrometer ISOLTRAP at ISOLDE/CERN, a multi-reflection time-of-flight mass spectrometer (MR-ToF-MS) in combination with a Bradbury-Nielsen gate (BNG) can be used to achieve high-resolution isobar purification with mass-resolving powers of 105 in a few tens of milliseconds [1, 2]. Furthermore, the MR-ToF device can be used as a spectrometer to determine the masses of nuclides with very low yields and short half-lives, where a Penning-trap mass measurement becomes impractical due to the lower transport efficiency and decay losses during the purification and measurement cycles. Recent cross-check experiments show that the MR-ToF MS allows mass measurements with uncertainties in the sub-ppm range. In a first application the mass measurements of the nuclides 53,54Ca was performed [3], delivered with production rates as low as 10/s and half-lives of only 90(6) ms [4]. The nuclides serve as important benchmarks for testing modern chiral effective theory with realistic 3-body forces.

The contribution will present the on-line mass spectrometer ISOLTRAP focusing on the new applications, which became possible after the implementation of the MR-ToF MS into the current setup. In particular, the mass measurements of the neutron-rich calcium isotopes up to A=54 will be discussed. In addition, measurements of the isotonic potassium isotopes will be reported.

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