Atomistic simulation of point defects behavior in ceria

Aurore Guglielmetti, Alain Chartier, Laurent van Brutzel, Jean Paul Crocombette, Kazuhiro Yasuda, Constantin Meis, Syo Matsumura

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The cerium and oxygen threshold displacement energies and the Frenkel pair recombination in CeO2 have been investigated with empirical potential molecular dynamics simulations. The oxygen and cerium threshold displacement energies have been evaluated to be 27 and 56 eV, respectively, in agreement with experimental results. The short-range cerium and oxygen Frenkel pair recombination processes are found to be strongly dependent on the local topology and the pathways. The oxygen Frenkel pair recombinations are either spontaneous or thermally activated unlike the standard recombination usually defined in rate equations. The lifetime of Frenkel pair recombination is in general found to be much shorter than the characteristic time for single defect diffusion.

元の言語英語
ページ(範囲)5120-5125
ページ数6
ジャーナルNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
266
発行部数24
DOI
出版物ステータス出版済み - 12 1 2008

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Instrumentation

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