GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt is one of the leading particle-accelerator laboratories for science. Currently, the new FAIR (Facility for Antiproton and Ion Research), one of the world's largest research projects, will be built in international cooperation. GSI and FAIR offer the opportunity to work together in this international environment with a team of employees committed to ensure each day to conduct world-class science.

We are looking for an expert in nuclear-physics experiments, with emphasis on the science with radioactive beams and its related technical developments. We invite applications from

Reference 25.84-1240

The R³B experiment represents a challenging setup in the frame of the FAIR NUSTAR pillar and is carried out in the environment of an international collaboration. R³B provides the capability to pursue a broad physics program with relativistic radioactive beams addressing nuclear structure and nuclear astrophysics questions. During the year 2027, the setup is planned to move to its new experimental hall in the upcoming FAIR facility, where the R³B physics program will start in early 2028. With the intense and clean beams from the Super-FRS, R³B will provide novel and unique opportunities for the research with radioactive beams.

The position

We are looking for an outstanding experimental physicist with a track record in experimental nuclear science and experience in related detection and analysis methods, to support the operation and maintenance of the R3B experiment and the further development of its science program.

The work includes:

• overseeing, maintenance, as well as development of the R3B experiment in collaboration with the local experts and international collaborators,
• participation in the development and operation of specific detectors and DAQ systems,
• taking responsibility for certain devices as a host-lab coordinator
• training and coordination of collaborating local and international partners, and
• the supervision of students.

The applicant is expected to take active part in the experimental program.

Requirements

• PhD or doctoral degree in physics
• Experience in the following areas:
• nuclear-physics experiments and detector systems,
• signal processing and event reconstruction,
• analysis and simulation of complex detection systems,
• data handling and distribution.
• Good spoken and written knowledge in English and at least basis knowledge in German.
• Skills in organization and communication.

We offer

The position is limited to five years with the perspective on permanent employment in case of positive evaluation after three years.

Salary is equivalent to that for public employees as specified in the collective agreement for public employees (TVöD Bund).

GSI supports the vocational development of women. Therefore, women are especially encouraged to apply for the position.

Handicapped persons will be preferentially considered when equally qualified.

Information about FAIR and GSI is available at www.gsi.de and www.fair-center.eu.

If you are interested in this challenging position and would like to work in an exceptional international environment with a strong focus on experimentation, please send your full application documents to the following address by 15 October 2025.

These documents should include a motivation letter, CV, a list of your most important publications with an explanation of your own contribution, and a list of development projects you have completed. Please also provide information on your earliest possible starting date and the reference number above to:

GSI Helmholtzzentrum für Schwerionenforschung GmbH

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