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Published online by Cambridge University Press: 01 February 2011
Simulating radiation damage production and evolution in materials is a problem spanning many orders of magnitude in both time and length scales. Therefore, any one simulation method will be inadequate for studying radiation damage. We apply several modeling techniques to study radiation damage in oxides, specically MgO, Al-doped MgO and MgAl2O4 spinel. We use molecular dynamics to simulate damage production in collision cascades, where energies between 400 eV and 5 keV were investigated. The kinetic behavior of the resulting defects was probed on long time scales using temperature accelerated dynamics. Molecular statics was used to calculate fundamental properties of these defects, and density functional theory calculations support the basic results of the empirical potential studies. Finally, a chemical rate theory model is developed to understand the impact of the atomic scale behavior on dislocation loop size.