Modification of LiF structure by irradiation with swift heavy ions under oblique incidence

Ilze Manika, Janis Maniks, R. Zabels, K. Schwartz, Rolands Grants, Alma K. Dauletbekova, A Rusakova, Maxim Vladimirovich Zdorovets

2013

Full text Open access: Gold Metadata (CSL-JSON)

DOI 10.1088/1757-899x/49/1/012011

Data confidence 70 medium

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Abstract

The structural modifications of LiF irradiated with swift heavy ions under oblique angles have been investigated using AFM, SEM, chemical etching, nanoindentation and optical absorption spectroscopy. LiF crystals were irradiated under incidence angles of 30 and 70 degrees with 2.2 GeV Au (fluence 57×l011 ions-cm2) and 150 MeV Kr ions (fluence 1012–1014 ions·cm−2). Structural study on sample cross-sections shows that two damage regions – (1) nanostructured zone and (2) dislocation – rich zone, which are typical for irradiations at normal incidence, appear also in samples irradiated under oblique angles. However in the latter case a more complex structure is formed that leads to stronger ion-induced hardening.