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MS: Fachverband Massenspektrometrie

MS 2: Precision Mass Spectrometry 1/ RIMS

MS 2.1: Hauptvortrag

Montag, 17. März 2014, 14:15–14:45, DO24 1.205

A Phase-Imaging Ion-Cyclotron-Resonance Technique for Mass Measurements of short-lived Nuclides — •Sergey Eliseev¹, Klaus Blaum¹, Michael Block², Stanislav Chenmarev³, Andreas Doerr¹, Christian Droese⁴, Tommi Eronen¹, Pavel Filjanin³, Mikhail Goncharov¹, Martin Hoecker¹, Jochen Ketter¹, Enrique Minaya Ramirez¹, Dmitriy Nesterenko³, Yuri Novikov³, Lutz Schweikhard⁴, and Vanessa Simon¹ — ¹Max-Planck Institute for Nuclear Physics, Germany — ²GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Germany — ³Petersburg Nuclear Physics Institute, Russia — ⁴Institute for Physics, Ernst-Moritz-Arndt-University,Germany

A novel approach to mass measurements on the sub-ppb level even for short-lived nuclides with half-lives well below one second is presented. It is based on the projection of the radial ion motion in a Penning trap onto a position sensitive detector. Compared to the presently employed time-of-flight ion-cyclotron-resonance technique, the novel approach is 25-times faster and provides a 40-fold gain in resolving power. With the new technique low-lying isomeric states with excitation energy on the 10-keV level can be separated from the ground state. Moreover, the new technique possesses a substantially higher sensitivity since just two ions are sufficient to determine the ion cyclotron frequency. A measurement of the mass difference of singly charged ions of 132Xe and 131Xe with an uncertainty of 25 eV has demonstrated the great potential of the new approach.