Research assistant (f/m/d) DM-881

Freie Universität Berlin

Fachbereich Biologie, Chemie, Pharmazie - Institut für Chemie und Biochemie - Anorganische Chemie, AG Radiochemie

The Huittinen research group at the Institute of Chemistry and Biochemistry, Freie Universität Berlin, works in the fields of inorganic solid-state chemistry and radiochemistry. Our research focuses on molecular and solid-state compounds containing f-elements and technetium, with the aim of understanding how composition, oxidation state and local structure determine their chemical and physical properties.

A major focus of our research is on materials for the nuclear fuel cycle and the safe disposal of radioactive waste. By combining the synthesis of novel materials with advanced structural and spectroscopic characterization techniques, we address both fundamental questions in chemistry and application-oriented challenges.

Research assistant (f/m/d) DM-881

with 75%-part-time job

limited to 31.10.2029

salary grade (Entgeltgruppe) E13 TV-L FU

reference code: DM-881

Tasks

The research assistant position (f/m/d) is part of the collaborative project ATLAS – Structural stability and integrity of spent nuclear fuel phases from interim storage to final disposal: Linking atomistic behaviour and technical aspects, funded by the Federal Ministry for the Environment, Climate Action, Nature Conservation and Nuclear Safety (BMUKN) (subject to funding approval).

The project brings together researchers from Forschungszentrum Jülich, Helmholtz-Zentrum Dresden-Rossendorf, Freie Universität Berlin, Goethe University Frankfurt and RWTH Aachen University. The overall aim is to understand how radiation damage affects the long-term stability of spent nuclear fuel during extended interim storage. At Freie Universität Berlin, the project focuses on radiation-induced changes in oxide model materials relevant to spent nuclear fuel.

Your tasks:

Synthesis of cerium-based oxide model materials (polycrystalline CeO2 and CeO2 doped with lanthanides and zirconium) by wet-chemical and solid-state methods, simulating the elevated fission-product inventories of high-burnup nuclear fuel. Preparation of radionuclide-containing model compounds, in particular Pu-based perovskite phases, during research stays at partner institutes. Ion irradiation of model phases with Au and He ions to simulate recoil damage and helium accumulation in the materials, as well as long-term self-irradiation experiments on Pu-doped oxide phases. Structural, spectroscopic and microscopic characterization of pristine and irradiated materials using X-ray diffraction, Raman spectroscopy, electron microscopy, and X-ray absorption spectroscopy. Analysis of radiation-induced structural and chemical changes, including dose-response relationships and helium solubility behaviour. Evaluation and interpretation of experimental data in collaboration with modelling partners, providing input parameters for defect models and SCIANTIX simulations. Presentation of research results at international conferences and publication in peer-reviewed journals. Active participation in project meetings and collaborative research within the ATLAS consortium.