| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1686024 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms | 2008 | 6 Pages |
Irradiation with ions and electrons provides accelerated study of radiation damage in nuclear materials, such as those proposed for immobilization of actinides and long-lived fission products. The effects of ion irradiation in SrTiO3, Sm2Ti2O7 and Sr2Nd8(SiO4)6O2, as representative materials, are studied using 1 MeV Au+ ions. The irradiation-induced disorder, due to atomic collisions processes, increases nonlinearly with irradiation dose and is well described by a disorder accumulation model that includes contributions from amorphous domains, point defects and defect clusters. Ionization from 200 keV electrons induces recrystallization at the amorphous/crystalline (a/c) interface that exhibits several distinct stages associated with residual defect annihilation near the interface, epitaxial regrowth at the interface and a surface-stabilized amorphous state. Understanding ionization effects and the coupled effects of electronic and atomic dynamics on material behavior is a challenging area for scientific research.
