Naslov
Ion tracks in CaF2: old questions, new answers

Autori
Karlušić, Marko ; Ghica, Corneliu ; Negrea, Raluca F. ; Siketić, Zdravko ; Jakšić, Milko ; Schleberger, Marika ; Fazinić, Stjepko

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, 51-51

Skup
22nd International Workshop on Inelastic Ion-Surface Collisions

Mjesto i datum
Dresden, Njemačka, 17.09.2017. - 22.09.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
swift heavy ion ; ion track ; CaF2 ; thermal spike model

Sažetak
There is an ongoing debate regarding the mechanism of swift heavy ion track formation in CaF2 [1-3]. The objective of this study is to shed some light on this important topic using a range of complementary analytical techniques. By presenting new experimental data obtained by Rutherford backscattering spectroscopy in channeling, transmission electron microscopy and atomic force microscopy, we give evidence for ion track formation in CaF2 for electronic stopping power values as low as 3 keV/nm. This surprisingly low value suggests that current interpretations of ion track formation in CaF2 using thermal spike mechanisms are inadequate [4]. We also present a new way of analysing RBS/c data giving clear indications for disordering of the fluorine sublattice at these low stopping powers, even under conditions when the calcium sublattice remains undamaged, probably due to recrystallization. Furthermore, information about the elemental composition within the ion track is obtained using scanning transmission electron microscopy - electron energy loss spectroscopy, and in situ time of flight elastic recoil detection analysis. These advances (both in the use of analytical techniques and in the way of data analysis) pave the way for a better understanding of ion track formation mechanisms. [1] M. Toulemonde et al., Phys. Rev. B 85 (2012) 054112 [2] G. Szenes, Phys. Rev. B 87 (2013) 056101 [3] M. Toulemonde et al., Phys. Rev. B 87 (2013) 056102 [4] M. Karlušić, C. Ghica, R.F. Negrea, Z. Siketić, M. Jakšić, M. Schleberger, S. Fazinić, On the threshold for ion track formation in CaF2, New J. Phys. (2017) accepted, http://dx.doi.org/10.1088/1367-2630/aa5914

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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