Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 9: Precision spectroscopy of atoms and ions II (with Q)

A 9.6: 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 Block^2,3, Werner Lauth⁴, Hartmut Backe⁴, Thomas Walther¹, Peter Kunz⁵, and Fritz-Peter Hessberger^2,3 — 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.