Berlin 2024 – wissenschaftliches Programm

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KFM: Fachverband Kristalline Festkörper und deren Mikrostruktur

KFM 9: KFM Poster Session

KFM 9.17: Poster

Montag, 18. März 2024, 18:00–20:00, Poster E

ASCII: The Ultra-Low Energy Ion Implantation of Radioisotopes for Surface Characterization at ISOLDE-CERN — •Nicole Pereira de Lima^1,2, Hannes Gürlich^2,3, Juliana Schell^2,4, Koen van Stiphout^5,6, Lukas M. Eng³, Magnus Hegelund^2,7, Doru Lupascu⁴, Bruno Correa¹, Levy Scalise¹, Boris Koppitz³, Samuel Seddon³, and Hans Hofsäss^2,6 — ¹University of Sao Paulo, Sao Paulo, Brazil — ²European Organization for Nuclear Research (CERN) — ³Technische Universität Dresden (TUD) — ⁴University Duisburg-Essen — ⁵KU Leuven — ⁶University of Göttingen — ⁷Aalborg University

In solid-state physics, radioactive isotopes have been used for a long time to study the crystallographic, electric, and magnetic characteristics of nanostructures. The favored technique for introducing radioactive nuclei into the crystal structure is ion implantation at energies between 1 and 100 keV. However, the increased scientific interest in 2D materials, multiferroics, and especially their interfaces demands different approaches to isotope implantation.

Thus, the ASCII chamber's purpose is to decelerate and then implant radioactive ions (usually PAC-isotopes) at various energies, including ultra-low energies (> 20 eV). When implanting with these low energies, as in the initial ASPIC chamber, an extremely high vacuum of up to p < 10-9 mbaris required. All these improvements will allow us to study hyperfine techniques on multiple systems. ASCII is therefore an innovative instrument system that promises to contribute to surface and interface research in solid-state physics.

Keywords: ion implantation; radioactive; perturbed-angular correlations; surface science; ultra-low energy