Thèse Photophysique de Systèmes Carbonés dans les Conditions du Milieu Interstellaire H/F

Doctorat.Gouv.Fr

Établissement : Université Paris-Saclay GS Physique
École doctorale : Ondes et Matière
Laboratoire de recherche : Institut des Sciences Moléculaires d'Orsay
Direction de la thèse : Thomas PINO ORCID 0000000216467866
Début de la thèse : 2026-10-01
Date limite de candidature : 2026-04-30T23:59:59

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Up to now, analogues of the interstellar species from a few tens to few hundreds carbon atoms have been scarcely explored in the laboratory although they may contain up to several tens of % of the available interstellar carbon and they are suspected to play a crucial role in the physics and chemistry of the interstellar medium.

The goal of the project is to tune original flames and efficiently produce such systems of similar size and structures as those suspected in space, and study their photophysics in conditions mimicking those of the interstellar medium.

the project will combine several online laser diagnostics of laboratory flames laser induced fluorescence, laser induced incandescence and resonant multiphoton ionization. These online experiments will be performed on cooled sampled species to drastically reduce the spectral congestion and clean up the flame background (target T=50K, a unique setup), completed by highly sensitive time-of-flight mass spectrometry (TOFMS) using various photoionization (PI) schemes from resonant 2 colour to direct VUV processes.