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MS: Fachverband Massenspektrometrie

MS 6: Poster

MS 6.4: Poster

Dienstag, 13. März 2012, 16:30–19:00, Poster.IV

MR-ToF Isobar Separation for Mass and Life-Time Measurements of Neutron-Rich Zinc at ISOLTRAP — Georges Audi¹, Dietrich Beck², Klaus Blaum³, Christine Böhm³, Christopher Borgmann³, Martin Breitenfeldt⁴, R. Burcu Cakirli³, Thomas Elias Cocolios⁵, Sergey Eliseev³, Sebastian George⁶, Frank Herfurth², Alexander Herlert⁷, Jürgen Kluge², Magdalena Kowalska⁵, Susanne Kreim^3,5, David Lunney¹, Enrique Minaya Ramirez², Sarah Naimi⁸, Dennis Neidherr², •Marco Rosenbusch⁹, Stefan Schwarz⁶, Lutz Schweikhard⁹, Juliane Stanja¹⁰, Meng Wang¹, Frank Wienholtz⁹, Robert N. Wolf⁹, and Kai Zuber¹⁰ — ¹CSNSMIN2P3-CNRS, Université de Paris Sud, Orsay, France — ²GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany — ³Max-Planck-Institut für Kernphysik, Heidelberg, Germany — ⁴Instituut voor Kernen Strahlingsfysica, Leuven, Belgium — ⁵CERN, Geneva, Switzerland — ⁶NSCL, Michigan State University, East Lansing, USA — ⁷FAIR GmbH, Darmstadt, Germany — ⁸RIKEN Research Facility, Japan — ⁹Ernst-Moritz-Arndt-Universität, Greifswald, Germany — ¹⁰Technische Universität, Dresden, Germany

High-precision Penning-trap mass measurements of short-lived nuclei are performed with ISOLTRAP at the on-line isotope separator ISOLDE/CERN. An important prerequisite to achieve relative uncertainties of δ m/m=10⁻⁸ is the availability of purely isobaric ion ensembles. To enhance the purity of radioactive ion beams, a multi-reflection time-of-flight mass separator developed at the University of Greifswald [1,2] has recently been implemented at the ISOLTRAP setup. A mass resolving power of R=2·10⁵ and a contaminant reduction of four orders of magnitude by use of a Bradbury-Nielsen ion gate have been achieved. The performance of the combined setup (including an RFQ ion buncher, the MR-ToF MS and the two Penning traps) in both offline tests as well as in first applications with radioactive ion beams will be presented. Furthermore, the physics case and recent results of mass measurements of neutron-rich Zinc will be shown.

[1] R. N. Wolf et al., Hyperfine Interact. 199, 115 (2011)

[2] R. N. Wolf et al., Int. J. Mass Spectrom., accepted