University of Jyväskylä
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Doctoral Researcher in Optical and Chemical Characterization of Slow Liquid Scintillators for Neutrinoless Double Beta Decay and Rare-Event Searches University of Jyväskylä in Finland
Degree Level
PhD
Field of study
Computer Science
Funding
Fixed-term doctoral researcher position for 3.5 years, expected to lead to completion of the doctoral thesis. Salary starts at approximately 2500 EUR/month gross under the Finnish University Salary System, with revision based on thesis progress and a holiday bonus. The project includes a three-month research stay in Mainz or Padova and participation in campaigns at INFN Legnaro.
Deadline
Sep 30, 2026
Country
Finland
University
University of Jyväskylä

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About this position
Doctoral Researcher opening at the University of Jyväskylä, Department of Physics, in optical and chemical characterization of slow liquid scintillators for neutrinoless double beta decay and rare-event searches.
The position is part of the Academy Research Fellowship project “Bridging Detector and Nuclear Physics for Next-Generation Neutrinoless Double Beta Decay with Slow Liquid Scintillators” led by Dr. Mariia Fedkevych (with Dr. Kai Loo as contact). The work combines particle physics, nuclear physics, optical chemistry, detector R&D, and data analysis.
Main research tasks include synthesis and preparation of slow-LS samples with metal-organic dopants (Mo, Te, Se), measurement of absorption/emission spectra, decay-time constants and attenuation lengths, evaluation of chemical compatibility and long-term stability, and building a validated database of optical parameters for Geant4 simulations and ML-based event reconstruction.
Applicants should have or be close to completing a Master’s degree in physics or a related field. Required skills include hands-on experimental ability, basic programming (Python/C++ or similar), good English, and willingness to collaborate internationally and travel for research stays and beam campaigns. Experience with optical spectroscopy, photon detection, scintillator characterization, chemical handling, detector instrumentation, Geant4, ROOT, or machine learning is an advantage.
The appointment is fixed-term for 3.5 years and is expected to lead to a doctoral thesis. The starting salary is about 2500 EUR/month gross under the Finnish University Salary System, with a holiday bonus and later salary revision based on thesis progress.
Application materials must be submitted in English as PDF files: CV, a short motivation/cover letter (max 2 pages), and the highest degree certificate. The application deadline is 2026-09-30. After selection, the candidate must separately apply for postgraduate study rights at the University of Jyväskylä.
Funding details
Fixed-term doctoral researcher position for 3.5 years, expected to lead to completion of the doctoral thesis. Salary starts at approximately 2500 EUR/month gross under the Finnish University Salary System, with revision based on thesis progress and a holiday bonus. The project includes a three-month research stay in Mainz or Padova and participation in campaigns at INFN Legnaro.
What's required
Applicants should hold or be close to completing a Master’s degree in physics or a related field. Required qualifications include strong experimental hands-on skills and interest in laboratory work, basic scientific programming skills (Python, C++, or similar), good written and spoken English, and willingness to participate in international collaboration and travel for research visits and beam campaigns. Experience in optical spectroscopy, photon detection, scintillator characterization, laboratory chemical handling, detector instrumentation, data analysis, Geant4, ROOT, or machine learning is advantageous. The selected candidate must also obtain permission for postgraduate studies at the University of Jyväskylä.
How to apply
Prepare the application in English as PDF files: CV, a short motivation/cover letter (max 2 pages), and the highest degree certificate. Submit the application through the recruitment system before 2026-09-30. After selection, apply separately for postgraduate study rights at the Faculty of Mathematics and Science.
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