Quantum aspects of molecular motions in solids : proceedings of an ILL-IFF workshop, Grenoble, France, September 24-26, 1986

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Quantum aspects of molecular motions in solids : proceedings of an ILL-IFF workshop, Grenoble, France, September 24-26, 1986

editors, A. Heidemann ... [et al.]

(Springer proceedings in physics, v. 17)

Springer-Verlag, c1987

  • : us
  • : gw

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Includes bibliographies and index

内容説明・目次

目次

I Rotational Tunneling I - Potentials and Phonon Interaction.- The Temperature Dependence of Rotational Tunneling - Simulation of a Quantum System at Finite Temperatures.- The Rotational Potential of Solid Nitromethane.- The Orientation of the Rotational Potential in the Crystal Frame: (NH4)2PtCl6.- Inelastic Neutron Scattering Study of Methyl Tunnelling in ?-Crystallised Toluene..- Tunnelling Spectroscopy and Dynamics of CH3 in a Homologous Series of Ketones.- NH4+ Motions in NH4MF3 Cubic Perovskites.- Spectroscopic Raman Study of Trifluoroperovskites of Ammonium Under High Pressure.- II Rotational Tunneling II - Coupled Systems.- Rotational Tunneling of Coupled Groups Studied by Inelastic Neutron Scattering..- Study of the Dipolar Proton Spin System in Lithium Acetate with NMR Dispersion Spectroscopy.- Tunnelling of Ammine Ligands in Nickel Hexammine Iodide.- The Free Rotor, NH3, in Metal Hexammine Ions.- Tunnel Spectroscopy by Dipolar-Driven NMR.K..- Zeeman-Tunnel Resonance Line Shapes in NMRRR Investigations of Rotational Tunneling..- Coupled Tunneling of Methyl Groups in Solids as Studied by Proton NMR Method..- Tunneling of CH3 Groups in Molecular Crystals of the X(CH3)n Type..- III Rotational Tunneling III - Surfaces, Isotope Effect, Matrix Isolation.- Hindered Rotation and Tunnelling of Adsorbed Species.- Rotational Tunneling of Matrix-Isolated Tetramethyl Compounds.- Rotational Excitations in (CH4)1?xKrxSolid Mixtures.- Quantum Rotation of Ammonia Molecules in Disordered Ca(NH3)6.- The Methyl Rotational Potentials of Various Isotopic Methyl Iodides and Their Coupling to Phonons.- Partially Deuterated Methyl Groups in Molecular Solids: The System 4-CH2D-C5H4N with an Original Sixfold Symmetric Barrier.- Calorimetric and Dielectric Study of Partly Deuterated Ammonium Hexachlorostannate.- Tunneling to Reorientation Transition Effects in High Field 2H-NMR Spectra of ND4+ Ions..- IV Translational Tunneling.- Influence of Phonons and Electrons on Low-Temperature Translational Tunneling..- Quantum Diffusion of Light Interstitials in Metals.- The Influence of Electrons on the Tunneling State of a Hydrogen Atom in a Metal..- H and D Tunneling in Nb: Dependence on Defect Concentration and Trapping Center..- Sound Velocity Measurements on Hydrogen-Doped Niobium in the Superconducting and Normal States.- Quantitative Theory of the Tunnel Level Splitting for Hydrogen Trapped at Oxygen in Niobium..- Debye-Waller Peculiarity in Phonon-Assisted Tunneling.- Quantum Diffusion Above ?Debye/2..- Hydrogen Diffusion by Tunneling in Metals.- Optical Studies of Proton Tunneling and Relaxation in Benzoic Acid.- V Disordered Systems.- How Universal Is the Spectral Density of Tunneling States in Glasses?.- Very Low Frequency Elastic Loss of PMMA Below 5 K.- Ultrasonic Attenuation Study of Two-Level Systems in Neutron- Irradiated Quartz upon Heat Treatment.- The One-Dimensional Quantum Rotator H2S ~ in Several Alkali Halides..- Relaxation Times of k?0 Rotons in Parahydrogen Crystals at Low Concentrations of Orthohydrogen Impurities.- Index of Contributors.

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