Berlin 2005 – scientific programme

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MS: Massenspektrometrie

MS 2: Posterbeiträge

MS 2.5: Poster

Friday, March 4, 2005, 11:45–12:30, Poster HU

Simulations of a new excitation scheme for mass determination of exotic nuclides at ISOLTRAP — •Sudarshan Baruah¹, Klaus Blaum^2,3, Alexander Herlert^1,4, Gerrit Marx¹, and Lutz Schweikhard¹ — ¹Institut für Physik, Universität Greifswald, 17487 Greifswald, Germany — ²Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany — ³GSI, 64291 Darmstadt, Germany — ⁴CERN, Physics Department, 1211 Geneva 23, Switzerland

Accurate mass measurements on radionuclides are of utmost importance e.g. for nuclear structure studies but also to contribute to tests of the Standard Model. The ISOLTRAP experiment at CERN allows for accurate mass measurements on short-lived radionuclides. They are performed by employing a time-of-flight cyclotron-resonance detection technique by use of a Penning trap, where the ions are excited with a radiofrequency quadrupolar field.

The obtained resolving power is proportional to the time duration for which the quadrupolar excitation is applied. It has been conceived that applying an octupolar excitation instead can improve the resolving power by a factor of 2. The scheme of octupolar excitation is currently being investigated by simulation studies and first results will be presented.