In the interstellar medium polycyclic aromatic hydrocarbon molecules (PAH) are exposed to strong ionizing radation leading to complex organic photochemistry. We investigated these ultrafast fragmentation reac-tions after ionization of the PAHs phenanthrene, fluorene and pyrene at a wavelength of 30.3 nm using pump probe spectroscopy at a free electron laser. We observe double ionization and afterwards hydrogen abstraction and acetylene loss with characteristic time scales for the reaction processes below one hundred femtoseconds.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 11 Jun 2020|
|Event||31st International Conference on Photonic, Electronic and Atomic Collisions, ICPEAC 2019 - Deauville, France|
Duration: 23 Jul 2019 → 30 Jul 2019