A formula for numerical estimation of the threshold energy Ed of atomic displacement from lattice sites upon the irradiation of solids is proposed for the first time. The Ed structure is determined by analyzing processes accompanying the subthreshold motion of a lattice atom ejected from a site (when the energy W acquired by the atom does not exceed Ed). The relation between Ed and the physical properties of solids and the parameters of their crystal lattice is shown. It is established that the partial contribution of the binding energy to Ed does not exceed 30%, and the dissipative energy losses (intracrystalline friction) during such atomic motion is about 10%. The main part of Ed is determined by the work of the forces of electrostatic (in the case of semiconductors and insulators) and elastic (for metals) interaction between vacancies and interstitial atoms.
- intracrystalline friction
- radiation defect
- radiation resistance of materials
- stable and unstable vacancy–interstitial-atom pair
- threshold displacement energy
ASJC Scopus subject areas
- Surfaces, Coatings and Films