Ion tracks in CaF2: old questions, new answers (CROSBI ID 652071)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
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