Inert Gases

1. Argon and Its Companions..- 1.1 Prologue: Inert, Rare or Noble?.- 1.2 Research with Inert Gases.- 1.3 Outline of the Present Book.- References.- 2. Interatomic Potentials for Rare-Gases: Pure and Mixed Interactions.- 2.1 Background.- 2.2 What Probes What?.- 2.3 Review of Recent Research on Pure Interactions.- 2.4 Review of Recent Research on Unlike Interactions.- 2.5 Combining Rules.- 2.6 Conclusions.- Appendix: 2.A Interatomic Potential Functions.- 2.B Interatomic Potential Parameters.- 2.C Predictions of Collisons Cross-Sections by Potentials.- References.- 3. Dynamics of Impure Rare-Gas Crystals.- 3.1 Background.- 3.2 Lattice Dynamics of Impure Crystals.- 3.3 Theoretical Studies.- a) Potentials.- b) Relaxation Effects.- c) Three-Body Forces.- d) Phonon Density of States.- 3.4 Experimental Studies.- a) Argon Doped with Krypton.- b) Argon Doped with Neon.- c) Argon Doped with Helium.- d) Argon Doped with Xenon.- e) Krypton Doped with Argon.- f) Krypton Doped with Xenon.- 3.4.2 Molecules in RGS.- a) Homonuclear Diatomics.- b) Heteronuclear Diatomics.- c) RGS Doped with Methane.- a) Molecular Ions.- b) Molecules.- c) Atoms.- 3.5 Summary.- References.- 4. Spectroscopy of Vibrational and Rotational Levels of Diatomic Molecules in Rare-Gas Crystals.- 4.1 Background.- 4.2 Experimental Techniques and Results.- a) Sample Preparation.- b) Spectroscopy (Conventional Versus Laser).- c) Saturation Spectroscopy or Hole Burning.- d) Time-Resolved Spectroscopy.- a) Vibrational Transitions.- b) Rotational Transitions.- c) Phonon Sidebands.- a) Infrared Spectroscopy.- b) Visible Spectroscopy.- 4.3 Intermolecular Interaction in Rare-Gas Crystals Containing Molecular Defects.- a) Atom-Atom Potential.- b) Multiparameter Potential Functions.- c) Ab Initio Potential Surfaces.- d) ChargeTransfer and Hydrogen Bonding.- a) Energy Levels.- b) Relaxation Processes.- 4.4 Perturbation of Energy Levels.- a) Effect of Isotropic Terms.- b) Effect of Internal Molecular Motions.- c) Description of Lattice Vibrations Through Molecular Dynamics.- d) Phonon Sidebands in IR Spectra of the Guest Molecule.- a) Vibrational Matrix Shift.- b) Rotational Matrix Shift.- 4.5 Population Relaxation Processes.- a) Microscopic Processes Among Molecules in Rare-Gas Crystals.- b) Microscopic Probabilities for Vibrational Energy Transfer.- c) Macroscopic Kinetics for Vibrational Energy Transfer.- d) Comparison Between Theory and Experiment.- a) The Direct Process.- b) Raman and Orbach Processes.- 4.6 Spectral Line Shapes and Dephasing Processes.- a) Isolated Vibrational Levels with a Large Spacing.- b) Additional Low-Energy Levels in the Molecule.- 4.7 Concluding Remarks.- References.- Additional References with Titles.