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RESEARCH PRODUCT
Color centers and nanodefects in LiF crystals irradiated with 150MeV Kr ions
A.t. AklibekovR. ZabelsJanis ManiksMaxim V. ZdorovetsI. ManikaY.v. BikhertAlma DauletbekovaK. Schwartzsubject
Nuclear and High Energy PhysicsCrystallographyMaterials scienceAbsorption spectroscopyScanning electron microscopeAnnealing (metallurgy)Ion trackAnalytical chemistryIrradiationNanoindentationSpectroscopyInstrumentationIondescription
Abstract The modifications of structure, optical and nano-mechanical properties of LiF crystals after irradiation with 150-MeV Kr +14 ions at a fluence of 6 × 10 12 ions cm −2 have been studied using optical absorption spectroscopy, scanning electron and atomic force microscopy, and nanoindentation. Optical spectroscopy shows the saturation of F centers and a comparatively high number of F n centers. AFM and SEM imaging reveals a nanostructured region with columnar nanocrystallites (size 30–90 nm). Nanostructuring occurs in depths up to 10 μm, where the ion energy loss surpasses a critical threshold of about 10 keV/nm. At a lower energy loss a zone enriched with dislocations is observed. Structural changes are accompanied by a substantial increase of hardness. The recovery processes of structure and properties under annealing have been studied.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2012-09-01 | Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms |