Selyshchev P. The nonlinear couplings and external fluctuations in self-organization of radiation defect structures.

In the dissertation theoretical investigation for the role of nonlinear couplings between elements of damage structure of irradiated crystal in its self-organization and influence of external fluctuations of defect generation rate on this process is developed. It is shown that nonlinear couplings determine kind and parameters of the arising structure or terminal behavior namely concentration decomposition in alloys, oxygen impurity redistribution and its nongomogeneous precipitation in silicon, breaks on curves of the creep-rate dependence on temperature and dose, creep and swelling rate oscillations. Parameters of the arising structures and conditions of its development is obtained. It is determined the fluctuations of irradiation conditions most strongly apparent in dynamic behavior of system. As a result new unstable regions and new dynamic behavior that do not have determinate analog appear. The cause of it is strong interaction between fluctuations that is accompanied by their essential increase.