Frankfurt 2006 – scientific programme
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MS: Massenspektrometrie
MS 9: Posterbeiträge
MS 9.13: Poster
Thursday, March 16, 2006, 16:30–18:30, Labsaal
Mass measurements of rare-earth radionuclides at SHIPTRAP — •Christian Rauth1, Michael Block1, Ankur Chaudhuri1,2, Sergey Eliseev1,3, Frank Herfurth1, Hans-Jürgen Kluge1, Ana Martin1, Gleb Vorobjev1,3, and the SHIPTRAP collaboration1 — 1GSI, Planckstr. 1, 64291 Darmstadt, Germany — 2Institut für Physik, Ernst-Moritz-Arndt-Universität , 17489 Greifswald, Germany — 3St. Petersburg Nuclear Physics Institute, Gatchina 188300, Russia
The SHIPTRAP experiment at GSI Darmstadt was set up to study different properties of heavy elements produced in fusion-evaporation reactions at SHIP. The physics program ranges from laser spectroscopy to in-trap decay spectroscopy. First experiments focus on precision mass measurements with a Penning trap mass spectrometer. The accurate knowledge of mass values of exotic nuclei is an important basis for different fields in nuclear physics, such as test of nuclear models, investigations on shell structure effects and the determination of the proton dripline.
During on-line runs in autumn 2005 a primary beam of 58Ni with a beam energy of 4.35 MeV/u and a intensity of up to 4 eµA was used to produce radionuclides around 147Ho in the reaction 92Mo(58Ni,xpxn). The masses of eight isotopes were measured, four of them for the first time. From the mass values the proton separation energy can be determined for investigations of the proton dripline, while the two neutron separation energy along an isotopic chain allows for studies of the N=82 shell closure.
The talk will give an overview of the SHIPTRAP set-up and the present status. The second part will focus on the on-line measurements, their analysis procedure and the final results.