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Coherent quasi-elastic neutron scattering from lattice gases and its relationship to fick’s law of diffusion

  • D. K. Ross
  • M. Kemali
  • D. J. Bull
Conference paper
Part of the Lecture Notes in Physics book series (LNP, volume 519)

Abstract

Quasi-Elastic Neutron Scattering provides a direct way of investigating diffusive mechanisms where the incoherent form is related to tracer diffusion and the coherent form to Fick’s Law diffusion. This paper is concerned with the different information provided by these distinct measurements for the particular case of a lattice gas. The extension of the Chudley-Elliott Model to CQENS from interacting lattice gases is described. The form of QENS for anomalous scattering is also described. These ideas are applied to the case of oxygen diffusion in YBCO at high temperatures where there are some indications of anomalous diffusion associated with the formation of Cu-O chains

Keywords

Oxygen Diffusion Anomalous Diffusion Tracer Diffusion Palladium Hydride Recoil Peak 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1999

Authors and Affiliations

  • D. K. Ross
    • 1
  • M. Kemali
    • 1
  • D. J. Bull
    • 1
  1. 1.Joule Physics LaboratoryUniversity of SalfordSalfordUK

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