POSTDOC (M/F) – Measurement of beta decay properties of nuclei relevant to nuclear structure and astrophysics, antineutrino spectra, and reactor physics
New
- Researcher in FTC
- 12 month
- Doctorate
This offer is available in English version
This offer is open to people with a document recognizing their status as a disabled worker.
Offer at a glance
The Unit
Laboratoire de physique subatomique et des technologies associées
Contract Type
Researcher in FTC
Working hHours
Full Time
Workplace
44307 NANTES
Contract Duration
12 month
Date of Hire
01/09/2026
Remuneration
between 3071,50 € to 4258,37€, depending on experience
Apply Application Deadline : 27 June 2026 23:59
Job Description
Missions
The Nuclear Structure and Energy group at the SUBATECH laboratory conducts experimental research focused on studying the beta decay properties of nuclei relevant to nuclear structure and astrophysics, antineutrino spectra, and reactor physics, in close collaboration with the IFIC team in Valencia and the University of Surrey. These measurements are performed using two experimental techniques: the TAGS (Total Absorption Gamma-ray Spectroscopy) technique, based on the detection of gamma rays de-exciting the daughter nucleus using a calorimeter, and the direct measurement of the shape of the electron energy spectrum (E-Shape experiment). The TAGS technique provides access to the beta-force distribution, which is directly comparable to theoretical microscopic models. It also helps avoid the Pandemonium effect. The direct measurement of the shape of the electron spectrum is dedicated to the study of forbidden beta transitions. It also helps avoid the Pandemonium effect.
Activity
The candidate's main tasks will involve analyzing one of the two experiments described below and conducting R&D on a new total absorption spectrometer (called (NA)2STARS) using LaBr3 modules. Two TAGS experiments proposed by the SUBATECH team in collaboration with the IFIC teams in Valencia, Madrid, and Warsaw were carried out in 2022 and 2023 at the University of Jyväskylä (Finland) and ISOLDE at CERN.
The candidate's primary objective will be to characterize the detector for the study of neutron-rich nuclei of interest for reactor decay heat, reactor antineutrino spectra, nuclear structure, and astrophysics. In addition, some of the proposed nuclei are delayed neutron emitters and are important for the r-process. The goal will be to study the detection capabilities of LaBr3 for delayed neutrons by time-of-flight technique. After this first objective, the postdoc could be involved in the next R&D works foreseen in the team regarding (NA)2STARS and e-Shape devices.
In addition, the candidate will be required to participate in the preparation and execution of the team's upcoming experiments, notably the commissioning of the STARS detector at GANIL and the upcoming experiment at the University of Jyväskylä in Finland in 2027. In this context, the candidate may also contribute to the development of a new experiment proposal.
Your Profil
Skills
The candidate must hold a Ph.D. in nuclear physics.
Significant experience with experimental nuclear structure and C++ programming, particularly with ROOT and GEANT4, would be an asset.
The candidate must demonstrate the ability to work in a research environment and be a team player.
The candidate must be able to prepare research results for publication and presentation at scientific conferences.
The candidate must be fluent in spoken and written English.
Your Work Environment
Subatech Laboratory, Subatech experimental test bench; the candidate may be required to travel to the experimental sites in Jyväskylä, ISOLDE, and GANIL
Constraints and risks
Work with radioactive sources and high voltage at facilities producing exotic nuclei
Compensation and benefits
Compensation
between 3071,50 € to 4258,37€, depending on experience
Annual leave and RTT
44 jours
Remote Working practice and compensation
Pratique et indemnisation du TT
Transport
Prise en charge à 75% du coût et forfait mobilité durable jusqu’à 300€
About the offer
| Offer reference | UMR6457-SOPDEP-069 |
|---|---|
| CN Section(s) / Research Area | Atoms and molecules, optics and lasers, hot plasmas |
| Relevant experience | 1 to 4 years |
About the CNRS
The CNRS is a major player in fundamental research on a global scale. The CNRS is the only French organization active in all scientific fields. Its unique position as a multi-specialist allows it to bring together different disciplines to address the most important challenges of the contemporary world, in connection with the actors of change.
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