Explanipedia

Probing Cold Supersonic Jets with Optical Frequency Combs Open

Romain Dubroeucq, Quentin Le Mignon, Julien Lecomte, Nicolas Suas-David, Robert Georges , et al. · 2025

We report high-resolution, cavity-enhanced direct frequency comb Fourier transform spectroscopy of cold acetylene (C2H2) molecules in a planar supersonic jet expansion. The experiment is based on a near-infrared frequency comb with a 300 M…

Analysis of a non-LTE hypersonic spectrum of methane between 5880 and 6220 cm−1 Open

Lyam Rolland, Eszter Dudás, Nicolas Suas-David, M. Rey, S. Kassi , et al. · 2025

The dynamics of champagne cork popping revisited through high-speed schlieren imaging and computational fluid dynamics simulations Open

Joffrey Fréreux, Benjamin Tomasetti, Abdessamad Bénidar, Gérard Liger‐Belair, A Balaji Himakar , et al. · 2024

Cork popping represents a rich and complex fluid dynamics process, involving up to three phases (liquid, gas, and solid), three main chemical compounds (ethanol, water, CO2), and a moving cork gradually opening the bottle and blocking the …

Jet-Cooled Ethylene Cavity Ring-Down Spectroscopy between 5880 and 6200 Cm-1 Open

Solène Perot, Julien Lecomte, Nicolas Suas-David, Lucile Rutkowski, M. Rey , et al. · 2024

Laboratory investigation of shock-induced dissociation of buckminsterfullerene and astrophysical insights Open

Shubhadip Chakraborty, S. N. Yurchenko, Robert Georges, Aude Simon, Ozan Lacinbala , et al. · 2024

Fullerene C 60 is one of the most iconic forms of carbon found in the interstellar medium (ISM). The interstellar chemistry of carbon-rich components, including fullerenes, is driven by a variety of energetic processes including UV and X-r…

SPECTROSCOPY OF HYDROCARBONS RELEVANT TO THE ATMOSPHERES OF HOT JUPITER EXOPLANETS IN THE 1.6-1.7 Î¼m RANGE: UNAMBIGUOUS ASSIGNMENT OF ETHYLENE TRANSITIONS Open

Solène Perot, M. Rey, Vladimir G. Tyuterev, Nicolas Suas-David, Julien Lecomte , et al. · 2023

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NEAR-INFRARED SPECTROSCOPY OF DISSOCIATED NAPHTHALENE IN A RADIOFREQUENCY PLASMA Open

Julien Lecomte, Nicolas Suas-David, Christine Charles, Rod Boswell, Eszter Dudás , et al. · 2023

International audience

High resolution Mid-Infrared spectroscopy of Volatile Organic Compounds from Fourier Transform and Quantum Cascade Laser measurements: case of 2-furfural Open

Pierre Asselin, Sathapana Chawananon, Manuel Goubet, Robert Georges, Anthony Roucou , et al. · 2023

International audience

Rovibrational Spectroscopy of Trans and Cis Conformers of 2-Furfural from High-Resolution Fourier Transform and QCL Infrared Measurements Open

Sathapana Chawananon, Pierre Asselin, Jordan A. Claus, Manuel Goubet, Anthony Roucou , et al. · 2023

The ortho-isomer 2-furfural (2-FF), which is a primary atmospheric pollutant produced from biomass combustion, is also involved in oxidation processes leading to the formation of secondary organic aerosols. Its contribution to radiative fo…

The Water Vapor Self-Continuum Absorption at 8.45 Μm by Optical Feedback Cavity Ring Down Spectroscopy Open

Quentin Fournier, S. Kassi, D. Mondelain, Hélène Fleurbaey, Robert Georges , et al. · 2023

NON-LTE INFRARED SPECTRUM OF JET-COOLED NAPHTHALENE Open

Shubhadip Chakraborty, Robert Georges, Ludovic Biennier, Manuel Goubet, Pierre Asselin , et al. · 2022

A GLOBAL RAM METHOD FOR FITTING INFRARED AND FAR-INFRARED DATA FOR SMALL VOLATILE ORGANIC COUMPOUNDS: APPLICATION TO TOLUENE Open

V. V. Ilyushin, Isabelle Kleiner, Pasquale Sellitto, F. Kwabia Tchana, Pierre Asselin , et al. · 2022

International audience

IN SITU SPECTROSCOPIC DIAGNOSTIC OF SHOCK INDUCED DECOMPOSITION OF C60 Open

Shubhadip Chakraborty, Ludovic Biennier, E. Arunan, V Jayaram, Vijayanand Chandrasekaran , et al. · 2022

Computational Fluid Dynamic simulation of the supersonic CO2 expansion during champagne cork popping Open

Abdessamad Bénidar, Robert Georges, Daniel Cordier, Gérard Liger‐Belair · 2022

Behind the iconic “pop!" accompanying the uncorking of a champagne bottle hides a gas flow of surprising complexity. Its modeling is made delicate by its supersonic nature, its interaction with the cork stopper, the eminently unsteady char…

HIGH-TEMPERATURE SPECTROSCOPIC DATA FOR EXO-PLANETARY STUDIES: THE e-PYTHEAS PROJECT Open

Vincent Boudon, Vladimir G. Tyuterev, Robert Georges, A. Campargue, A. Coustenis · 2021

The e-PYTHEAS project combines theoretical and experimental work with exoplanet modelling applications. Our approach is to use theoretical research validated by laboratory experiments and to then inject it into models of the atmospheres of…

HIGH-TEMPERATURE HYPERSONIC LAVAL NOZZLE FOR NON-LTE CAVITY RINGDOWN SPECTROSCOPY Open

Eszter DUDÁS, Nicolas Suas-David, Christine Charles, S. Kassi, Vinayak Kulkarni , et al. · 2021

The SMAUG apparatus (Spectroscopy of Molecules Accelerated in Uniform Gas flows) was developed to produce hot spectra of various molecules of interest for hot astrophysical atmospheres, like the one surrounding hot Jupiters, reaching up to…

Absorption Spectroscopy of Solid-Phase Fullerene C60 between 1.65 and 2.78 μm Open

Shubhadip Chakraborty, Karine Demyk, Ludovic Biennier, Robert Georges · 2020

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HIGH-TEMPERATURE HYPERSONIC LAVAL NOZZLE FOR NON-LTE CAVITY RINGDOWN SPECTROSCOPY Open

Eszter Dudás, Robert Georges, Christine Charles, S. Kassi, Abdessamad Bénidar , et al. · 2020

High-temperature hypersonic Laval nozzle for non-LTE cavity ringdown spectroscopy Open

Eszter Dudás, Nicolas Suas-David, Shuvayan Brahmachary, Vinayak Kulkarni, Abdessamad Bénidar , et al. · 2020

A small dimension Laval nozzle connected to a compact high enthalpy source equipped with cavity ringdown spectroscopy (CRDS) is used to produce vibrationally hot and rotationally cold high-resolution infrared spectra of polyatomic molecule…

Synchrotron-Based High Resolution Far-Infrared Spectroscopy of trans-Butadiene Open

Marie‐Aline Martin‐Drumel, Jessica P. Porterfield, Manuel Goubet, Pierre Asselin, Robert Georges , et al. · 2020

The high resolution far-infrared spectrum of trans-butadiene has been reinvestigated by Fourier-transform spectroscopy at two synchrotron radiation facilities, SOLEIL and the Canadian Light Source, at temperatures ranging from 50 to 340 K.…

Jet-cooled rovibrational spectroscopy of methoxyphenols using two complementary FTIR and QCL based spectrometers Open

Pierre Asselin, Jonas Bruckhuisen, Anthony Roucou, Manuel Goubet, Marie‐Aline Martin‐Drumel , et al. · 2019

Methoxyphenols (MPs) are a significant component of biomass burning emissions which mainly exists in our atmosphere in the gas phase where they contribute to the formation of secondary organic aerosols (SOAs). Rovibrational spectroscopy is…

Under-expanded supersonic CO 2 freezing jets during champagne cork popping Open

Gérard Liger‐Belair, Daniel Cordier, Robert Georges · 2019

During champagne cork popping, the gaseous jet expelled from the bottleneck behaves as a rocket plume exhaust.

High enthalpy source dedicated to quantitative infrared emission spectroscopy of gas flows at elevated temperatures Open

Robert Georges, Jonathan Thiévin, Abdessamad Bénidar, Sophie Carles, Badr Amyay , et al. · 2019

The High Enthalpy Source (HES) is a novel high temperature source developed to measure infrared line-by-line integrated absorption cross sections of flowing gases up to 2000 K. The HES relies on a porous graphite furnace designed to unifor…

EXO-PLANETARY HIGH-TEMPERATURE HYDROCARBONS BY EMISSION AND ABSORPTION SPECTROSCOPY (e-PYTHEAS PROJECT) Open

Vincent Boudon, A. Coustenis, A. Campargue, Robert Georges, Vladimir G. Tyuterev · 2019

e-PYTHEAS is a multidisciplinary project which combines theoretical and experimental work with exoplanet modelling applications. It sits on the frontier between molecular physics, theoretical chemistry and astrophysics. It aims at enhancin…

Detecting branching ratios of chemical reactions at astrophysically relevant temperatures using chirped pulse millimeter wave spectroscopy in continuous CRESU flows Open

Brian M. Hays, Théo Guillaume, Thomas Hearne, Omar Abdelkader Khedaoui, Ilsa R. Cooke , et al. · 2019

The reactions of molecules in interstellar space occur over a wide range of temperatures, down to 10 K or colder. The study of gas-phase chemical reactions at these temperatures has been difficult until the development and implementation o…

The Platypus exoplanet project Open

Eszter Dudás, Dimitrios Tsifakis, Christine Charles, Rod Boswell, S. Kassi , et al. · 2019

Out-of-equilibrium hypersonic jet spectroscopy Open

Eszter Dudás, S. Kassi, Vinayak Kulkarni, Christine Charles, Abdessamad Bénidar , et al. · 2018

THE JET-COOLED HIGH-RESOLUTION FAR-IR SPECTRUM OF FORMIC ACID CYCLIC DIMER Open

T. R. Huet, Robert Georges, Pierre Asselin, P. Soulard, Olivier Pirali , et al. · 2018

\\begin{wrapfigure}\n\n{r}{0pt}\n\n\\includegraphics[scale=0.47]{C2VMI355nm.eps}\n\n\\end{wrapfigure}\n\nAt first glance dicarbon, C$_2$, would appear to be a very simple homonuclear diatomic molecule. However the bonding structure of C$_2…

Erratum: “New investigation of the ν3 C–H stretching region of 12CH4 through the analysis of high temperature infrared emission spectra” [J. Chem. Phys. 148, 134306 (2018)] Open

Badr Amyay, Aline Gardez, Robert Georges, Ludovic Biennier, J. Vander Auwera , et al. · 2018

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New investigation of the ν3 C–H stretching region of 12CH4 through the analysis of high temperature infrared emission spectra Open

Badr Amyay, Aline Gardez, Robert Georges, Ludovic Biennier, J. Vander Auwera , et al. · 2018

The ν3 C–H stretching region of methane was reinvestigated in this work using high temperature (620-1715 K) emission spectra recorded in Rennes at Doppler limited resolution. This work follows our recent global analysis of the Dyad system …

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