Berlin 2014 – wissenschaftliches Programm
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.