XUV Pump-Probe Experiments on Diatomic Molecules: Tracing the Dynamics of Electron Rearrangement and Interatomic Coulombic Decay (Springer Theses)

This book explores the relaxation dynamics of inner-valence-ionized diatomic molecules on the basis of extreme-ultraviolet pump-probe experiments performed at the free-electron laser (FEL) in Hamburg. Firstly, the electron rearrangement dynamics in dissociating multiply charged iodine molecules is studied in an experiment that made it possible to access charge transfer in a thus far unexplored quasimolecular regime relevant for plasma and chemistry applications of the FEL. Secondly the lifetime of an efficient non-radiative relaxation process that occurs in weakly bound systems is measured directly for the first time in a neon dimer (Ne 2 ). Interatomic Coulombic decay (ICD) has been identified as the dominant decay mechanism in inner-valence-ionized or excited van-der-Waals and hydrogen bonded systems, the latter being ubiquitous in all biomolecules. The role of ICD in DNA damage thus demands further investigation, e.g. with regard to applications like radiation therapy. Front Matter....Pages i-xi Introduction....Pages 1-8 Photoionization and Interatomic Coulombic Decay....Pages 9-44 Free-Electron Lasers....Pages 45-55 Experimental Setup....Pages 57-81 Data Analysis....Pages 83-97 Ionization Dynamics of $$\text {I}_{2}$$ I 2 in XUV and IR Laser Pulses....Pages 99-148 ICD Lifetime in $$\text {Ne}_{\mathbf {2}}$$ Ne 2 ....Pages 149-179 Conclusions and Outlook....Pages 181-188 Back Matter....Pages 189-191