Influence of the Integration Limits on the Shape of Pair Correlation Functions of Non-Crystalline Materials

Abstract

Influence of the termination effect on the shape of pair correlation functions and values of structural parameters of liquid and amorphous materials has been investigated. It is shown that termination of the diffraction curve at Q(min) > 0 rather strongly affects the region around the first peak of g(r) especially its left flank. On the other hand, presence or absence of a prepeak at low Q-values of the structure factor does not bring any difference to the pair correlation functions. Decreasing of the upper limit of the diffraction vector causes shift, decrease and broadening of the first peak of the pair correlation function. Besides, this yields spurious oscillations in the vicinity of the first and the second maximum of g(r) of the liquid and amorphous materials. Therefore straightforward interpretation of the experimental data may be misleading. Some procedures to solve the problem are considered.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2001
Accession Number
ADP011510

Entities

People

  • I. Kaban
  • T. Halm
  • W. Hoyer

Organizations

  • Institute of Physics

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Advanced Materials
  • Amorphous Materials
  • Coherent Scattering
  • Detectors
  • Diffraction
  • Diffractometers
  • Distribution Functions
  • Experimental Data
  • High Angles
  • Intensity
  • Materials
  • Neutron Diffraction
  • Neutron Scattering
  • Oscillation
  • Scattering
  • X Rays
  • X-Ray Diffraction

Readers

  • Fluid Dynamics.
  • Materials Science and Engineering.
  • Microwave Engineering.