May 15 – 20, 2022
Casino Conference Centre
Europe/Prague timezone

Off-line single-atom gas chromatographic adsorption studies of bismuth

May 19, 2022, 2:06 PM
18m
Marble Hall

Marble Hall

Verbal Chemistry of Actinide and Trans-actinide Elements Actinoids and Transactinoids

Speaker

Mr Dominik Dietzel (JGU Mainz/GSI)

Description

In preparation of gas phase chemical experiments with element 115, we studied the chemical behavior of single short-lived bismuth atoms in rare gases (helium and argon) and in oxygen atmosphere. For that purpose, we performed off-line isothermal gas chromatography experiments at room temperature. The short-lived volatile Rn-219 precursor, provided from an Ac-227-source, was transported into the miniCOMPACT setup (mini Cryo-Online Multi detector for Physics And Chemistry of Transactinides) with different carrier gases. Chromatograms of Bi-211 were recorded as a function of various parameters like carrier gas type and gas flow rate, thus characterizing the novel miniCOMPACT detector array. This aids to optimize the conditions for future experiments with superheavy elements. All measured species deposited on the SiO2 surface of the miniCOMPACT via diffusion-controlled deposition. Furthermore, we performed adapted Monte Carlo simulations, which account for the precursor effect, and compared them to experimental results to determine the lowest limit value of the adsorption enthalpy of bismuth on silicon dioxide.

Primary author

Mr Dominik Dietzel (JGU Mainz/GSI)

Co-authors

Dr Alexander Yakushev (GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt) Prof. Christoph E. Düllmann (Johannes Gutenberg-University Mainz, GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt, Helmholtz-Institut Mainz) Mr Jörg Krier (GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt) Dr Jadambaa Khuyagbaatar (GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt, Helmholtz-Institut Mainz) Mr Egon Jäger (GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt)

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