6533b861fe1ef96bd12c4e9d
RESEARCH PRODUCT
Creation and thermal annealing of structural defects in neutron-irradiated MgAl 2 O 4 single crystals
E. ShabloninS. DolgovAnatoli I. PopovR. ParejaEduard FeldbachAleksandr LushchikV. Seemansubject
010302 applied physicsNuclear and High Energy PhysicsMaterials scienceAnnealing (metallurgy)Astrophysics::High Energy Astrophysical Phenomenachemistry.chemical_element02 engineering and technologyElectron021001 nanoscience & nanotechnology01 natural sciencesMolecular physicslaw.inventionCondensed Matter::Materials ScienceCrystallographyParamagnetismchemistrylawAluminiumVacancy defect0103 physical sciencesNeutronIrradiation0210 nano-technologyElectron paramagnetic resonanceInstrumentationdescription
Abstract Several novel hole-type defects (a hole localized at a regular oxygen ion near a negatively charged structural defect) have been revealed in fast neutron irradiated MgAl2O4 crystals using the EPR method. The pulse annealing of the EPR signal of these centers was compared to that of radiation induced optical absorption in the same crystals. Taking into account the determined models of V1, V2 and V22 paramagnetic centers, the tentative scenario of the thermal annealing process of neutron-induced defects (hole-type and complementary electron F-type ones) is proposed. In addition, one more paramagnetic hole center consisting of an Al|Mg as-grown antisite defect near an aluminum vacancy is created just by X-ray irradiation at room temperature.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2018-11-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |