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MS: Fachverband Massenspektrometrie
MS 4: New Methods, Technical Development
MS 4.7: Vortrag
Mittwoch, 4. März 2026, 16:15–16:30, N 6
UniCell - A new fast buffer-gas stopping cell for superheavy elements — •Felix Sprunk1,2, Christoph E. Düllmann1,2,3, Jochen Ballof2, Alexander Yakushev2, Marco Biljan2, Meyhar Dudeja2, Jörg Krier2, Jan Kulawik4, Sven Löchner2, Yeqiang Wei2,3, and Frederik Zielke2 — 1JGU Mainz, Germany — 2GSI Darmstadt, Germany — 3HI Mainz, Germany — 4Łukasiewicz - IMiF Cracow, Poland
A new universal fast buffer gas stopping cell (UniCell) has been built at GSI Darmstadt. It is optimized for the fast thermalization and efficient transfer of single atoms of these elements after their separation in the TASCA separator. It is designed to overcome the limitations of existing setups used for chemical studies of elements up to moscovium (element 115). The existing setup allows extracting separated and thermalized radioisotopes within a few hundred milliseconds, which is too slow, given that no isotopes with half-lives >60 ms are known for the heavier elements. UniCell will stop ions in helium at atmospheric pressure and extract them through a funnel using a DC gradient supported by an RF field, enabling fast and efficient ion extraction. Simulations yielded extraction times as short as 2 ms at nearly 100% efficiency. A prototype has been built and is now being commissioned. The current status of UniCell will be presented. Commissioning UniCell is a crucial step toward forthcoming investigations of the chemical behavior of livermorium and heavier elements.
Keywords: Superheavy elements; Buffer-gas stopping cell; Ion extraction