Dissociation of migrating particle from trap with long-range interaction field

Abstract

Some lattice defects, such as dislocations, interact with migrating species, e.g. vacancies, interstitial atoms and their clusters, via long-range strain fields. An equation for the mean dissociation time of a migrating particle from a trap is derived in terms of the potential well function for the interaction energy. The distribution of dissociation times is studied by the Monte Carlo method, and the problem of particle exchange between spatially separated traps is considered.

Keywords:

• lattice defects
• reaction-diffusion theory
• defect complexes
• dissociation

Acknowledgements

A.V.B. acknowledges a research grant from the UK Engineering and Physical Sciences Research Council. Research at ORNL was sponsored by the Division on Materials Sciences and Engineering (R.E.S. and Y.N.O.) and the Office of Fusion Energy Sciences (S.I.G.), US Department of Energy, under contract no. DE-AC05-00OR22 725 with UT-Battelle, LLC.