Speaker
Description
Radiation damage on genetic materials is very important field of research. Photoionization studies of small biomolecular building blocks and their analogues can contribute by giving insights into energetics and dynamics of pathways of formation of secondary electrons and cationic dissociation reactions. Here, I present double imaging photoelectron photoion coincidence study of pyridine, pyridine clusters and pyridine water complexes. From our mass selected photoelectron spectra different fragmentation channels can be assigned to the corresponding cationic states. An additional analysis of electron-ion-ion coincidences allows us to obtain similar data for dicationic states of the molecules, revealing metastable decay channels and initial insights into stepwise dissociation pathways. For pyridine water complexes this approach allows to distinguish between different local and non-local double ionization mechanisms like Intermolecular Coulombic Decay (ICD).
