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A Theoretical Investigation of the Effect of Intermolecular Correlations upon Properties of Simple Liquids from X-Ray Diffraction

Citation

Piliavin, Michael Aron (1973) A Theoretical Investigation of the Effect of Intermolecular Correlations upon Properties of Simple Liquids from X-Ray Diffraction. Dissertation (Ph.D.), California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:08272018-085905047

Abstract

This work reports a theoretical study on the effect of including intermolecular correlations in x-ray scattering data from simple liquids.

An instantaneous configuration-dependent scattering factor is defined for a molecule in a liquid. Using statistical mechanics and physical principles, an expression is derived that corrects the usual scattering equations, for both coherent and incoherent radiation.

Computations, using the new result, were done on liquid helium and argon. Comparison of correlated scattering factors and isolated molecule scattering factors show significant deviations, especially for larger angles of scattering. Incorporating correlation effects into scattering data for these liquids, the resultant radial distribution function peak is depressed an average of 1% and the potential energy is lowered by 5%. Treatment of data in this manner leads to better agreement with theoretical predictions.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:Engineering Science and Physics
Degree Grantor:California Institute of Technology
Division:Engineering and Applied Science
Major Option:Engineering
Minor Option:Physics
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Pings, Cornelius J.
Thesis Committee:
  • Unknown, Unknown
Defense Date:3 November 1972
Record Number:CaltechTHESIS:08272018-085905047
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:08272018-085905047
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:11162
Collection:CaltechTHESIS
Deposited By: Lisa Fischelis
Deposited On:27 Aug 2018 16:42
Last Modified:27 Aug 2018 16:42

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