XUV Pump-Probe Experiments on Diatomic Molecules - Tracing the Dynamics of Electron Rearrangement and Interatomic Coulombic Decay

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.

List of contents

Introduction.- Photoionization and Interatomic Coulombic Decay.- Free-Electron Lasers.- Experimental Setup.- Data Analysis.- Ionization Dynamics of I 2 in XUV and IR Laser Pulses.- ICD Lifetime in Ne 2 .- Conclusions and Outlook.- Appendices.

Summary

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 (Ne₂). 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.

Product details

• Authors: Kirsten Schnorr
• Publisher: Springer, Berlin
• Languages: English
• Product format: Paperback / Softback
• Released: 01.01.2016
• EAN: 9783319365558
• ISBN: 978-3-31-936555-8
• No. of pages: 191
• Dimensions: 155 mm x 11 mm x 235 mm
• Weight: 317 g
• Illustrations: XI, 191 p. 95 illus., 25 illus. in color.
• Series: Springer Theses; Springer Theses
• Subjects: Natural sciences, medicine, IT, technology > Physics, astronomy > Atomic physics, nuclear physics; B, Optics, Radiology, Microscopy, Atoms, Physics, spectroscopy, RADIATION, Spectroscopy and Microscopy, Physics and Astronomy, Classical Electrodynamics, Optical physics, Electricity, electromagnetism & magnetism, Electrodynamics, Spectrum analysis, spectrochemistry, mass spectrometry, Scientific equipment, experiments & techniques, Medical physics, Nuclear chemistry, photochemistry & radiation, Medical and Radiation Physics, Atoms and molecules in external fields