A5012506840- Advanced Chemical Physics Studies
- Molecular Spectroscopy and Structure
- Astrophysics and Star Formation Studies
- Spectroscopy and Laser Applications
- Laser Design and Applications
- Diamond and Carbon-based Materials Research
- Mass Spectrometry Techniques and Applications
- Electrohydrodynamics and Fluid Dynamics
- Fluid Dynamics and Heat Transfer
- Quantum, superfluid, helium dynamics
- Plant Surface Properties and Treatments
- Atomic and Molecular Physics
UCLouvain
2024-2025
Université Paris-Saclay
2017-2023
Institut des Sciences Moléculaires d'Orsay
2022-2023
We describe a simple gas expansion ion source based on static discharge voltages and commercially available pulsed valve. The is initiated by the pulse itself between two high voltage electrodes, without need for fast switches or complex timing schemes. very reliably produces intense bursts of molecular ions (with currents exceeding 100 μA during pulse-on phase) with only minor pulse-to-pulse variations in intensity shape. have characterized internal energy H3+ N2O+ produced source, using...
Cork popping represents a rich and complex fluid dynamics process, involving up to three phases (liquid, gas, solid), main chemical compounds (ethanol, water, CO2), moving cork gradually opening the bottle blocking fast progression of expanding gas. In this work, we used high-speed, high-sensitivity schlieren imaging setups provide fresh perspective on dynamical phenomenon. Our experimental results are systematically compared interpreted basis new computational simulations. combined...
Context. The rate of sputtering and release condensed species is an important aspect interstellar chemistry, as photodesorption for the most volatile species, because in absence such mechanisms whole gas phase would have to condense times often shorter than lifetime considered medium, particular dense clouds. recent detection cyclic aromatic molecules by radioastronomy requires understanding potential supporting rather high abundances observed. Aims. We perform experiments advance our yield...
We present a series of improvements the FANTASIO experimental set-up that couples supersonic expansion to cavity ring-down spectrometer originally reported by M. Herman, et al., Mol. Phys. 105, 815 (2007). In particular, implementation new pulsed slit valve 80 mm in length is detailed. The design based on powerful piezo stack actuator. Schlieren imaging used verify homogeneity molecular beam and quality performance. ability form weakly bound van der Waals complexes assessed using...
Context. The so-called bump spectral signature observable on interstellar extinction curves, peaking at 217.5 nm, is commonly assigned to π * ← transitions from carbonaceous carriers, but the exact nature of carriers remains debated. Aims. To constrain chemical structures associated with we record and compare UV spectra a large variety molecules this feature. Methods. Large molecules, such as polycyclic aromatic hydrocarbons (PAHs), were produced by combustion process stabilized low pressure...