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
27 June: This week, Alexandra presented our work at the International Symposium on Molecular Beams in St. Moritz, Switzerland!
24 April: Jolijn was invited to visit the University in Kassel, Germany, and presented our work there. It was great to see and hear about the research going on at the Institute of Physics!
7 April: Joëlle Schrijer joins us for her MSc internship. Welcome!
14 March: Jolijn attended the DPG Spring Meeting of the Atomic, Molecular, Quantum Optics and Photonics Section (SAMOP) in Bonn and presented our work there.
22 January: Yesterday and today, we were at NWO Physics. Alexandra presented our work in a talk, and Saskia showed it on a poster.
Recent publications
- An intense and controlled beam of S(1D2) atoms
Alexandra Tsoukala, Saskia Bruil, Niek Janssen, Saskia Pieters, Jolijn Onvlee
submitted (2025), arXiv:2508.02302 - Revisiting the inverse Abel integral for reconstructing velocity-map images
Chris Sparling, Jolijn Onvlee
Phys. Chem. Chem. Phys., published online (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