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Ion tracks in CaF2: old questions, new answers (CROSBI ID 652071)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Karlušić, Marko ; Ghica, Corneliu ; Negrea, Raluca F. ; Siketić, Zdravko ; Jakšić, Milko ; Schleberger, Marika ; Fazinić, Stjepko Ion tracks in CaF2: old questions, new answers // Proceedings of 22nd International Workshop on Inelastic Ion-Surface Collisions / Facsko, Stefan (ur.). Dresden: HZDR, 2017. str. 51-51

Podaci o odgovornosti

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

engleski

Ion tracks in CaF2: old questions, new answers

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

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

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Podaci o prilogu

51-51.

2017.

objavljeno

Podaci o matičnoj publikaciji

Proceedings of 22nd International Workshop on Inelastic Ion-Surface Collisions

Facsko, Stefan

Dresden: HZDR

Podaci o skupu

22nd International Workshop on Inelastic Ion-Surface Collisions

predavanje

17.09.2017-22.09.2017

Dresden, Njemačka

Povezanost rada

Fizika

Poveznice