Freiburg 2024 – scientific programme
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MS: Fachverband Massenspektrometrie
MS 5: Heavy and Superheavy Nuclei
MS 5.6: Talk
Wednesday, March 13, 2024, 12:30–12:45, HS 3042
Hyperfine structure of a Lawrencium homologue via Laser Resonance Chromatography — •Aayush Arya1, Eunkang Kim1, Michael Block1,2,3, Biswajit Jana1, Sebastian Raeder2,3, Harry Ramanantoanina1, Elisabeth Rickert1, Elisa Romero Romero1, and Mustapha Laatiaoui1,2,3 — 1Johannes Gutenberg-Universität Mainz, D-55128 Mainz — 2Helmholtz-Institut-Mainz, D-55128 Mainz — 3GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt
Atoms of different chemical elements possess absorption lines which serve as their unique fingerprints and provide direct insight into their internal structure. At present, elements up to atomic number 118 have been discovered, but due to their very short lifetimes and extremely low production rates even at the most intense beam facilities, the transfermium elements have thus far evaded direct spectroscopy. Recently, resonance ionization spectroscopy of nobelium was successfully achieved ``one atom at a time". However, pushing beyond nobelium with existing methods is challenging, and may require development of new methods for accessing even a single element. To this end, a technique named Laser Resonance Chromatography was conceived and has been successfully commissioned. Here, we present measurements of hyperfine structure and isotope shifts of lutetium ions using this method.As lutetium is an electronic homologue of lawrencium, our method relying on the ion-mobility based separation of different excited states directly demonstrates its potential for the laser spectroscopy of Lr and opens a new window for studying the superheavy elements.
Keywords: superheavy elements; resonance excitation; laser spectroscopy; hyperfine structure; isotope shifts