Researcher in Machine Learning for Nuclear Data Development

Uppsala University Department of Physics and Astronomy

Researcher in Machine Learning for Nuclear Data Development

Published: 2021-12-17

Uppsala University is a comprehensive research-intensive university with a strong international standing. Our ultimate goal is to conduct education and research of the highest quality and relevance to make a long-term difference in society. Our most important assets are all the individuals whose curiosity and dedication make Uppsala University one of Sweden’s most exciting workplaces. Uppsala University has over 45,000 students, more than 7,000 employees and a turnover of around SEK 7 billion.

The research conducted at the Department of Physics and Astronomy encompasses a wide range of physics topics, distributed over ten divisions. The department is located in the Ångström laboratory and employs nearly 400 people, 125 of whom are doctoral students. It offers a broad physics curriculum to undergraduate and graduate students, participation in nationally and internationally leading projects for researchers, and opportunities for partnership with industry and various outreach activities.


The Department of Physics and Astronomy at Uppsala University invites applications for one 2 year research position in machine learning for nuclear data development. The candidate is expected to develop and implement advanced methods from the field of machine learning in large-scale nuclear data evaluation algorithms. The work will include the use of nuclear model codes and the handling of experimental databases.  The goal is to develop new nuclear data libraries, with a high relevance for nuclear technology, well based in fundamental nuclear physics, with high predictive capabilities, and well-founded treatment of uncertainties. The work will be connected to the European framework programs SANDA (Solving Challanges in Nuclear Data for the Safety of European Nuclear FAcilities, H2020).  The group collaborates with researchers in Europe and the USA, and part of the placement may be done outside Uppsala. Supervision of undergraduate and PhD-student projects and teaching can be part of the working duties.


A Ph.D. degree in Physics, Mathematics, Data Science, or Nuclear Engineering.  High confidence in programming and statistics. Proficiency in English.

Desired skills

Experiences in methods from the field of machine learning, statistics,  nuclear data development, reactor physics, or nuclear physics are considered to be a strong advantage.

The application should be written in English and include:

  • Letter of motivation, with a short description of your research interests, and why you feel you are a

good match for the project (max two pages, ideally one).

  • CV, including a description of relevant skills and experiences, as well as a full publication list.
  • Copy of degree diploma, other official transcripts.
  • Contact information for references, which can support your application if contacted. Include a short description of how these individuals are professionally related to you.

Placement: Department of Physics and Astronomy

Type of employment: Full time, temporary position  two years.

Number of positions: 1

Working hours: 100%

Salary: Individually negotiated fixed salary.

Starting date: 14th of February, 2022, or as agreed upon.

For further information about the position, please contact: Henrik Sjöstrand, e-mail, phone +46 (0)18 471 3329.

Recent publications at give a good overview of the field. See particularly:

  1. Helgesson and H. Sjöstrand, “Treating model defects by fitting smoothly varying model parameters: Energy dependence in nuclear data evaluation,” Annals of Nuclear Energy, vol. 120, pp. 35–47, Oct. 2018, doi: 10.1016/j.anucene.2018.05.026.
  2. Schnabel, H. Sjöstrand, J. Hansson, D. Rochman, A. Koning, and R. Capote, “Conception and Software Implementation of a Nuclear Data Evaluation Pipeline,” Nuclear Data Sheets, vol. 173, pp. 239–284, Mar. 2021, doi: 10.1016/j.nds.2021.04.007.

Please submit your application by 24th January 2022, UFV-PA 2021/5017.

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Submit your application through Uppsala University's recruitment system.

Placement: Department of Physics and Astronomy

Type of employment: Full time , Temporary position longer than 6 months

Pay: Individual salary

Number of positions: 1

Working hours: 100%

Town: Uppsala

County: Uppsala län

Country: Sweden

Union representative: Seko Universitetsklubben

Number of reference: UFV-PA 2021/5017

Last application date: 2022-01-24