Article ID Journal Published Year Pages File Type
1681076 Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2014 4 Pages PDF
Abstract

Formation of prismatic dislocation loops and evolution of dislocation structure in LiF crystals irradiated with swift 238U and 36S ions of specific energy 11 MeV/u at fluences up to 1013 ions cm−2 has been investigated using chemical etching and AFM. It has been shown that prismatic dislocations are formed in the stage of track overlapping above threshold fluences Φ ≈ 109 U cm−2 and Φ ≈ 1010 S cm−2. The diameter of dislocation loops reaches 600–1000 nm for 238U ions and 200 nm for 36S ions. The dislocations created by 238U ions are arranged in rows along the direction of ion beam, whereas 36S ions create freely distributed dislocation loops each of them being oriented along the ion beam. The role of dislocations in ion-induced nanostructuring and hardening is discussed.

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Physical Sciences and Engineering Materials Science Surfaces, Coatings and Films
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