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MS: Fachverband Massenspektrometrie

MS 7: Massenspektrometrische Verfahren, neue Entwicklungen und Anwendungen

MS 7.4: Talk

Tuesday, March 11, 2008, 17:15–17:30, 3E

Design and Setup of a Time-of-Flight Isobar Separator and Mass Spectrometer for Exotic Nuclei — •Timo Dickel¹, Wolfgang Plaß¹, Ulrich Czok¹, Hans Geissel², Martin Petrick¹, Katrin Reinheimer¹, Christoph Scheidenberger², and Mikhail I. Yavor³ — ¹II. Physikalisches Institut, Justus-Liebig-Universität Gießen, 35392 Gießen — ²Gesellschaft für Schwerionenforschung, 64291 Darmstadt — ³Institute of Analytical Instrument Making, Russian Academy of Sciences, 190103 St. Petersburg

Mass measurements of nuclei far-off stability deliver important input in astrophysics (nucleosynthesis pathways) and nuclear physics. The duration of measurements of exotic nuclei is limited by their lifetime, and a prerequisite for a successful measurement is the ability to separate the nuclei of interest from isobaric contamination, which is usually produced with much higher rates than the nuclide of interest.

The present MR-TOF-MS is an ideal tool to solve these problems at low-energy radioactive ion beam facilities. It allows isobaric separation and measurement of nuclides with half-lives > 1 ms at a resolving power >= 10⁵ and up to 10⁷ ions/s. A setup for online measurements has been designed and is currently under construction. A dedicated cooler and buncher RF-trap assembly has been built as front-end for the MR-TOF-MS and successfully tested offline. First online experiments are planned for 2008.