Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 10: Precision spectroscopy of atoms and ions II (with A)
Q 10.6: Vortrag
Montag, 17. März 2014, 15:15–15:30, BEBEL E42
Laser spectroscopy of the heaviest elements at SHIPTRAP — •Felix Lautenschläger1, Mustapha Laatiaoui2, Premaditya Chhetri1, Michael Block2,3, Werner Lauth4, Hartmut Backe4, Thomas Walther1, Peter Kunz5, and Fritz-Peter Hessberger2,3 — 1Institut für Angewandte Physik, TU Darmstadt, D-64289 Darmstadt — 2Helmholtzinstitut Mainz, D-55128 Mainz — 3Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt — 4Institut für Kernphysik, JGU Mainz, D-55128 Mainz — 5TRIUMF, Vancouver, Canada
The Radiation Detected Resonance Ionization Spectroscopy is a powerful tool for the investigation of the atomic properties of heavy and superheavy elements. For our on-line experiments, we exploit a two-step photoionization process in a buffer-gas filled stopping cell. In the first stage, the 1P1- level of 254No, which can be produced in the complete fusion reaction 208Pb(48Ca,2n)254No, will be sought for using 4 dye lasers delivering the first excitation step and an excimer laser providing the second non-resonant excitation step. Due to the lower ionization efficiency of the non-resonant excitation step, the impact of the excimer laser pulse energy on the ionization efficiency was studied in off-line experiments, using nat. Yb. These results and a general overview of the experimental setup will be presented.