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Swift heavy ion track formation in SrTiO_3 and TiO_2

Detailed investigations of ion track morphologies attracted a lot of interest recently [1-4] because valuable information related to the ion track formation can be obtained in this way. For example, chainlike morphology of swift heavy ion tracks in SrTiO3 was related to the oscillating electronic stopping power when the swift heavy ion passes through the crystal under near channelling conditions [1]. In other study, core-shell track structure was attributed to the appearance of melt and vapor phase in a-SiO2 [4]. However, to test the predictions of the thermal spike models which are commonly used to describe ion tracks [5], [6], [7] it is of interest to obtain experimental data on continuous ion tracks. Therefore, in the present contribution, we present results of RBS/c measurements on SrTiO3 and TiO2 single crystals irradiated with 28 MeV I and 90 MeV Xe ions. Experimental results are compared to the predictions of analytical and inelastic thermal spike models. [1] E. Akcöltekin, T. Peters, R.Meyer, A. Duvenbeck, M. Klusmann, I.Monnet, H. Lebius and M. Schleberger, Nature Nanotechnology 2 (2007) 290. [2] M. Karlušić, S. Akcöltekin, O. Osmani, I. Monnet, H. Lebius, M. Jakšić, M. Schleberger, Energy threshold for the creation of nanodots on SrTiO3 by swift heavy ions, New J. Phys. 12 (2010) 043009. [3] S. Akcöltekin, H. Bukowska, T. Peters, O. Osmani, I. Monnet, I. Alzaher, B. Ban d’Etat, H. Lebius and M. Schleberger, Appl. Phys. Lett. 98 (2011) 103103. [4] P. Kluth, C. S. Schnohr, O. H. Pakarinen, F. Djurabekova, D. J. Sprouster, R. Giulian, M. C. Ridgway, A. P. Byrne, C. Trautmann, D. J. Cookson, K. Nordlund and M. Toulemonde, Phys. Rev. Lett. 101 (2008) 175503. [5] G. Szenes, Nucl. Instrum. Methods Phys. Res. B 269 (2011) 174. [6] M. Toulemonde, W. Assmann, C. Dufour, A. Meftah, C. Trautmann, Nucl. Instrum. Methods Phys. Res. B 277 (2012) 28. [7] M. Karlušić, M. Jakšić, Nucl. Instrum. Methods Phys. Res. B 280 (2012) 103.

swift heavy ion; highly charged ion; SrTiO_3; TiO_2

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