A series of kinetic Monte Carlo computer experiments performed on idealized systems clearly revealed the dramatic effects of 1-dimensional migration of self-interstitial atom crowdion clusters on the stability of void lattices. In the presence of migrating self-interstitial atom, void lattices were shown to be unstable under pure 3-dimensional self-interstitial atoms migration, but they were extremely stable, relative to random arrays of voids, under 1-dimensional self-interstitial atoms migration. Void lattices remain stable even under the condition of fairly frequent changes in the Burgers vectors of the 1-dimensional migrating self-interstitial atoms clusters. Clusters with average 1-dimensional path segments having lengths on the order of the nearest neighbor distance in the void lattice could maintain the stability of void lattices.

The Effects of One-Dimensional Migration of Self-Interstitial Clusters on the Formation of Void Lattices. H.L.Heinisch, B.N.Singh: Journal of Nuclear Materials, 2002, 307-311[2], 876-80