Welcome to the Controlled Chemical Reactions group!
What exactly happens during a chemical reaction? Our aim is to completely understand and, ultimately, fully control chemical reactions on the molecular level. We therefore investigate reactive collisions, in which chemical bonds are broken and new bonds are formed, between individual molecules in the gas phase. We make use of advanced experimental techniques to study these reactions in extremely high detail.
Our group is part of the Spectroscopy of Cold Molecules department within the Institute for Molecules and Materials of the Radboud University.

Latest news
26 June: Dong joined the Quantum Reactive Scattering Workshop in Gdańsk, Poland, and Jolijn attended the Stereodynamics conference in Madrid, Spain, this week. We both presented our work, and are greatful for all inspiring talks, posters, and discussions!
9 June: We have an open postdoctoral position! Get in touch if you’re interested!
26 January: Isabel and Madelief join us for their BSc internships. Welcome!
22 January: We’re hiring! We have open PhD and postdoc positions. Get in touch if you’re interested!
21 January: Yesterday and today, we were at NWO Physics in Veldhoven. Ana gave a talk and Dong presented a poster.
21 November: Our paper ‘Intense and controlled beam of S(1D2) atoms‘ was published in Physical Review A today and it was selected as Editors’ suggestion!
Recent publications
- Intense and controlled beam of S(1D2) atoms
Alexandra Tsoukala, Saskia Bruil, Niek Janssen, Saskia Pieters, Jolijn Onvlee
Phys. Rev. A 112, 053113 (2025), arXiv:2508.02302 - Revisiting the inverse Abel integral for reconstructing velocity-map images
Chris Sparling, Jolijn Onvlee
Phys. Chem. Chem. Phys. 27, 18694 (2025) - Imaging Resonance Effects in C + H2 Collisions using a Zeeman Decelerator
Vikram Plomp, Xu-Dong Wang, Jacek Kłos, Paul J. Dagdigian, François Lique, Jolijn Onvlee, Sebastiaan Y.T. van de Meerakker
J. Phys. Chem. Lett. 15, 4602 (2024), arXiv:2312.00203