Rostock 2019 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 10: Precision Spectroscopy of atoms and ions II (joint session A/Q)
Q 10.2: Vortrag
Montag, 11. März 2019, 14:30–14:45, S HS 2 Physik
High-resolution laser resonance ionization spectroscopy of 143−147Pm — •Dominik Studer1, Reinhard Heinke1, Sebastian Raeder2, Jiri Ulrich3, Rugard Dressler3, Dorothea Schumann3, Nicholas van der Meulen3, Saverio Braccini4, Tommaso Stefano Carzaniga4, and Klaus Wendt1 — 1Johannes Gutenberg-Universität Mainz — 2Helmholtz Institut Mainz — 3Paul Scherrer Institut Villigen — 4AEC-LHEP, University of Bern
Due to its exclusively radioactive nature with a maximum half-life of 17 years, the light lanthanide element promethium (Z=61) is scarcely studied. In order to extract atomic and nuclear properties using the accessible miniscule sample amounts, extensive spectroscopic studies were performed at Mainz University by laser resonance ionization spectroscopy.
In the 2017 campaign we could reveal over 1000 new atomic transitions and determine the first ionization potential experimentally for the first time. Recent results focus on the extraction of isotope shifts and nuclear moments from hyperfine spectra of two different ground state transitions at 452 nm and 468 nm. For these studies the long-lived isotopes 143−147Pm were produced by irradiation of natural neodymium oxide using the external beam line of the 18 MeV medical cyclotron at the Bern University Hospital, followed by chemical separation and purification at PSI Villigen. In this talk we present our dedicated spectroscopy ion source and laser setup as well as the spectroscopic results.