The structure of liquid lead: EXAFS and MD studies (Articolo in rivista)

Type
Label
  • The structure of liquid lead: EXAFS and MD studies (Articolo in rivista) (literal)
Anno
  • 2006-01-01T00:00:00+01:00 (literal)
Alternative label
  • Witkowska, A; Rybicki, J; De Panfilis, S; Di Cicco, A (2006)
    The structure of liquid lead: EXAFS and MD studies
    in Journal of non-crystalline solids
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Witkowska, A; Rybicki, J; De Panfilis, S; Di Cicco, A (literal)
Pagina inizio
  • 4351 (literal)
Pagina fine
  • 4355 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 352 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Gdansk Tech Univ, Dept Solid State Phys, PL-80952 Gdansk, Poland; TASK Comp Ctr, PL-80952 Gdansk, Poland; European Synchrotron Radiat Facil, F-38043 Grenoble, France; Univ Camerino, CNISM, CNR, INFM,Dipartimento Fis, I-62032 Camerino, Italy (literal)
Titolo
  • The structure of liquid lead: EXAFS and MD studies (literal)
Abstract
  • Accurate L-edge EXAFS (Extended X-ray Absorption Fine Structure) measurements of liquid Pb have been collected and analyzed using an advanced data-analysis technique (GNXAS) based on exact spherical wave multiple-scattering calculation of the absorption cross-section. Structural models obtained using molecular-dynamics (MD) simulations with an empirical and an embedded-atom potential, as well as structural data on liquid lead obtained from neutron and X-ray diffraction by other authors, have been put to a test using our new experimental results. The empirical two body potential, originally designed for the liquid state, reproduces quite accurately our experimental results. At the same time, the embedded atom potential, originally designed for the solid state, has turned out to inappropriately reproduce the first-neighbor g(r) peak. A comparison with previous XD and ND studies has shown that EXAFS analysis can improve our knowledge of the first-neighbor distribution. Previous observations of an apparent reduction in the coordination number in liquid Pb detected by EXAFS are briefly discussed. (c) 2006 Elsevier B.V. All rights reserved. (literal)
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