Analysis of the structure factor of dense krypton gas: Bridge contributions and many-body effects

Download
  1. Get@NRC: Analysis of the structure factor of dense krypton gas: Bridge contributions and many-body effects (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1103/PhysRevA.29.2734
AuthorSearch for: ; Search for:
TypeArticle
Journal titlePhysical Review A
ISSN0556-2791
Volume29
Issue5
Pages27342740; # of pages: 7
AbstractThe pair-correlation function g(r) of the Kr-type model fluid with only pair interactions was calculated using the Rosenfeld-Ashcroft modification of the hypernetted-chain (HNC) equation which includes bridge diagrams, and gave results in excellent agreement with Monte Carlo g(r) data. These bridge functions and the known pair potential were used to analyze the neutron-diffraction structure-factor data of Teitsma and Egelstaff, to determine the effective strength of the three-body potential as a function of the density assuming it to be of the Axilrod-Teller (AT) form. The strength of the effective three-body contribution s=ννtheor, where νtheor is the theoretical value, decreases for higher densities, suggesting that the many-body terms (beyond the Axilrod-Teller form) screen the AT interaction as the density increases. The results are very sensitive to the uncertainties in the structure factor S(k) for small k if parameter optimization is used to determine the effective pair potential. However, prediction of the compressibility using s=1 allows us to conclude that νtheor is consistent with the experimental data for low densities, to within the uncertainties in the presently available pair potentials and in the structure-factor data.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada
Peer reviewedYes
NRC number23119
NPARC number21274657
Export citationExport as RIS
Report a correctionReport a correction
Record identifier5e2da1a9-e411-4890-9988-079daf21d605
Record created2015-03-19
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)