Abstract

Determined are the threshold displacement energies (TDEs) for oxygen and silicon atoms in α-quartz silica, using molecular dynamics (MD) simulations of a system of 4068 atoms. Compared are the results with the BKS–ZBL and Pedone potentials, time step of 0.2fs, total simulation time of 1.0ps, and increased PKA energy, in increments of 1.0eV, up to 150eV. Investigated are the effects of the potential cutoffs on the calculated TDE probability-based statistical averages. TDEs with various probabilities are compared to reported experimental values. The TDE probability distributions, as opposed to a single TDE value, would provide a statistically broad assessment of radiation damage in the bulk material.

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