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Chemical Physics and Astrophysics● OpenPreview

Collisional Excitation and Reactivity for Astrophysical Applications

Fully funded PhD position to study molecular collisions at ultra-low temperatures for astrophysical applications.

Best for:Best for experimental physicists or physical chemists with a strong background in spectroscopy, lasers, or vacuum systems, eager to contribute to astrophysical research and molecular collision studies.

University of Rennes - CNRS · Rennes, France · R1 · First-stage researcher
More professors at University of Rennes - CNRS
molecular collision dynamicslow-temperature molecular physicsastrophysical chemistryinterstellar molecular processesmolecular spectroscopyCRESU technology applications
Deadline
Until filled
rolling
Funding
Stipend
Fully funded (amount not specified)
Start date
October–December 2026
Full-time
Location
Rennes
France

Overview

This fully funded 3-year PhD position is based at the Institute of Physics of Rennes (IPR), France, under the ANR-funded BRIGHTER programme. The project combines experimental and theoretical approaches to investigate collisional energy transfer and reactivity between molecules at very low temperatures, with direct applications in molecular astrophysics and astrochemistry. The successful candidate will work with state-of-the-art instrumentation, including chirped-pulse millimetre-wave spectrometers and CRESU technology, to study key astrophysically relevant molecules and radicals. Collaboration with experimental and theoretical teams at Rennes and a research stay at RIKEN (Japan) are integral parts of the project. The position offers a unique opportunity to contribute to fundamental research while advancing our understanding of molecular processes in interstellar environments, cometary comae, and planetary atmospheres.

astrophysical molecular collisionsexperimental chemical physicsmillimetre-wave spectroscopylaser-based experimentsmolecular astrochemistryultra-low temperature physicsmolecular reaction kineticsinterstellar medium studies

What you'll do

  • Conduct experimental studies on collisional excitation and reaction kinetics of astrophysically relevant molecules and radicals using advanced instrumentation like chirped-pulse millimetre-wave spectrometers and pulsed lasers.
  • Collaborate closely with experimental and theoretical teams at the Institute of Physics of Rennes to integrate findings from both approaches.
  • Perform research stays at RIKEN (Japan) to conduct complementary spectroscopic experiments and astronomical observations.
  • Analyze and interpret experimental data to advance the understanding of molecular collisions at very low temperatures.
  • Contribute to the development and application of CRESU technology for studying molecular processes in astrophysical environments.
  • Present research findings at international conferences and publish results in peer-reviewed journals.

Requirements

Degree required: Master's degree in physics, physical chemistry, or a related field (or expected to obtain by the start date)

Degree offered: PhD

Language: English proficiency (no specific test mentioned, but implied for international collaboration)

Instruction: English

Required skills
  • Experience with experimental techniques such as lasers, spectroscopy, vacuum systems, or electronics
  • Strong background in chemical physics or physical chemistry
  • Ability to work with advanced instrumentation and data analysis tools
  • Collaborative mindset for interdisciplinary research
Nice to have
Prior experience with millimetre-wave spectroscopy or CRESU technologyFamiliarity with theoretical modeling of molecular collisionsProficiency in programming languages such as Python or MATLAB for data analysis
Eligibility
  • Open to international applicants
  • No specific nationality restrictions mentioned
  • No residency or age limits specified

Funding & terms

Type
Stipend
Amount
Fully funded (amount not specified)
Duration
3 years
Programme
ANR-funded BRIGHTER programme
ANR (Agence Nationale de la Recherche)

How to apply

Deadline: 2026-12-31 (Europe/Paris) · open until filled

Applicants should submit a CV with grades, a cover letter, and details of 2-3 referees by email to Prof. Ian Sims. Applications are reviewed on a rolling basis until the position is filled.

Documents required
  • CV with grades
  • Cover letter
  • Referee details (2-3 references)
✉Apply by email

Contact

Ian Sims· Professor

ian.sims@univ-rennes.fr

+33 2 23 23 69 18

https://ipr.univ-rennes.fr/

IS
Prof.
Ian Sims
IPR - Institute of Physics of Rennes (UMR 6251)
Lab
IPR - Institute of Physics of Rennes
University of Rennes - CNRS
ANR-funded BRIGHTER programmeFrance
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