The Role of Rydberg States in Spectroscopy and Photochemistry

The aim of this volume is to offer a balanced overview of molecular Rydberg spectroscopy as it has developed over recent decades. Recent evolution has split Rydberg spectroscopy into two apparently distinct fields: the one concerns the low (n=3-5) Rydberg states, the other the very high (typically n>150) Rydberg states. The former is aimed at spectral levels where Rydberg, valence-shell, and intermediate-type states interact, with a variety of photochemical consequences. The latter considers states extremely close to the ionization limit, from whereionization is possible with a very slight amount of additional energy. Recently developed techniques make it possible to produce ions in well-defined electronic, vibrational and rotational states, including states resulting from spin-orbit or Jahn-Teller splitting. It is then possible to study the structure and reactions of such state-selected ions as well as those of the corresponding neutral molecules. These techniques amount to badly needed high resolution photoelectron spectroscopy.

Zusammenfassung
150) Rydberg states.

Inhalt
Low Rydberg Spectroscopy.- Spectroscopy and Photochemistry of Rydberg States of Small Polyatomic Hydride Molecules.- Ab Initio Configuration Interaction Calculations of Rydberg and Mixed Valence-rydberg States.- Theoretical Study of Circular Dichroism Spectra in the Vacuum-Ultraviolet.- Magnetic Dichroism in the Vacuum Ultraviolet.- Rydberg and Valence States in the Tetra-atomic Molecules B2H2, C2H2 and C2H2+.- The Rydberg Spectrum Of Aldehydes And Ketones: A comparison using formaldehyde as a benchmark.- The Rydberg Photophysics and Photochemistry of Amines.- Preliminaries.- High Rydberg Spectroscopy.- From Rydbergs To Zeke States.- Lifetimes of Rydberg States in Small Molecules: Fluorescence, Predissociation and Autoionization.- Rotation-Electronic Coupling in Diatomic Rydberg States.- The Dynamics of Electron Core Interaction in High Molecular Rydberg States.- Dynamics of a Rydberg Molecule in an External Magnetic Field.- Rydberg Atom-Molecule Charge-Exchange Reactions.- On The High Rydberg States Of The Formyl Radical The Dynamics of Vibrational Autoionization in Triatomic Molecules.- Rydberg State Spectroscopy Of The Sh Radical.- Artifacts in PFI-ZEKE Photoelectron Spectroscopy.