Naslov
Ion tracks on MgO, Al2O3 and MgAl2O4 surfaces

Autori
Karlušić, Marko ; Heller, Rene ; Brockers, Lara ; Siketić, Zdravko ; Tomić, Kristina ; Jakšić, Milko ; Schleberger, Marika

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Proceedings of 22nd International Workshop on Inelastic Ion-Surface Collisions / Facsko, Stefan - Dresden : HZDR, 2017, 63-63

Skup
22nd International Workshop on Inelastic Ion-Surface Collisions

Mjesto i datum
Dresden, Njemačka, 17.09.2017. - 22.09.2017

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
swift heavy ion ; ion track

Sažetak
Passage of the swift heavy ion (SHI) through the material can form an ion track, i.e. permanent damage along its trajectory. On the material surface, nanostructures can be found on the place of the SHI impact by means of atomic force microscopy. Materials investigated in this study (MgO, Al2O3 and MgAl2O4) are known to be highly resistant to SHI track formation, and threshold for nanostructure formation on their surfaces is very high, around 10-15 keV/nm [1]. The aim of the present work is twofold. First, we present new experimental results showing that SHI track formation on these materials surfaces can be produced already at 8 keV/nm if the grazing incidence irradiation geometry is applied [2]. Detailed investigations also show that in case of MgO, surface SHI tracks have rift-like morphology, while ion tracks on Al2O3 and MgAl2O4 surfaces have familiar hillock-like structure. In addition, results of the in situ ERDA measurements indicate unchanged surface stoichiometry during SHI irradiation. Second, we explore if these materials are also highly resistant to surface nanostructuring after highly charged ion (HCI) irradiation. Underlying mechanism of HCI track formation is driven by dense electronic excitations, similar to SHI track formation. Therefore, high values of HCI track formation thresholds are expected and offer good opportunity for testing models that describe HCI track formation [2-4]. [1] V.A. Skuratov, A.E. Efimov, K. Havancsak, Nucl. Instr. Meth. B 250 (2006) 245 [2] M. Karlušić et al., J. Phys. D: Appl. Phys. 48 (2015) 325304 [3] M. Karlušić, M. Jakšić, Nucl. Instr. Meth. B 280 (2012) 103 [4] C. Dufour et al., J. Phys.: Cond. Matter 29 (2017) 095001

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA