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Showing 1 to 6 of 6 for “"intermediate scattering function"”.
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Study of slow dynamics in supercooled water by molecular dynamics and quasi-elastic neutron scattering
… the spectrum of test particle fluctuations: intermediate scattering function (ISF). The theoretical models are compared with experimental measurements by quasi-elastic neutron scattering (QENS) and molecular dynamics (MD) simulation results. The dynamics of supercooled water can be decoupled …
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Ab initio modeling of hydrogen pipe diffusion in palladium
… data. Specifically, quasielastic neutron scattering (QENS) experiments, for the first time, directly measured hydrogen pipe diffusion. The diffusivities and energy barriers from ab initio simulations support these findings, but open questions remain, the most concerning of which pertains …
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Analysis of dislocation pipe diffusion in deformed alpha-phase PdHX using a synthesized QENS approach
Using quasielastic neutron scattering results from multiple spectrometers, material considerations are made for annealed and deformed PdH_x with sufficiently low [H] as to encourage the process of dislocation pipe diffusion (DPD) below a critical temperature. The results of this analysis indicate …
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Study of microscopic structure via NMR diffusive scattering
Scattering experiments can be carried out by gradient nuclear magnetic resonance(NMR) methods. Magnetic field gradient pulses are utilized to create linear phase ramps of the spin magnetization across the sample along arbitrary directions. The linear phase ramps are defined as dynamic spin …
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Diffusion of light adsorbates on transition metal surfaces
… In Chapter 3 expressions for the classical intermediate scattering function (ISF) are introduced for open and closed systems. The effects of corrugation and surface-perpendicular motion on the amplitude of different components in the ISF are modelled analytically and compared with …
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Monte-Carlo Simulation of Diffusion as an Aid to Interpreting Quasi-elastic Neutron Scattering from Lattice Gas Systems with Diffusion on Multiple Time-Scales
… systems is provided by quasi-elastic neutron scattering (QENS); the timescales that can be observed are dependent on the energy range and resolution of the instru- mentation. Historical QENS measurements of PdH have been interpreted in terms of single process involving nearest-neighbour jumps …