Dresden 2011 – scientific programme
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DS: Fachverband Dünne Schichten
DS 49: Ion Interactions with Nano Scale Materials IV (Focused Session -- Organisers: Diesing, Facsko)
DS 49.5: Talk
Thursday, March 17, 2011, 19:00–19:15, GER 37
Temporally resolved track creation in dielectrics after swift heavy ion irradiation. Part II: Two Temperature Model — •Orkhan Osmani1,2, Nikita Medvedev1, Bärbel Rethfeld1, and Marika Schleberger2 — 1University of Duisburg-Essen, Germany — 2Technical University of Kaiserslautern, Germany
The dynamics of structural modfications of dielectrics irradiated with swift heavy ions (E>1MeV/u and masses M>20 proton mass) are investigated theoretically. In part II of this report on our combined Monte Carlo–Two Temperature description we show that the results obtained from the MC calculations determine the conditions at which the TTM can be applied. Out of these results material parameters for the electron system, such as the specific heat capacity and the electron-phonon coupling, can be extracted. These parameters are necessary for the final track radii calculations within the TTM [1] and are often not accessible by experiments. It will be demonstrated how to couple the (kinetic) MC results with the (continuum) TTM simulation. Finally the computed track radius will be compared with experimental observations [2].
[1] O. Osmani, A. Duvenbeck, E. Akcöltekin, R. Meyer, H. Lebius and M. Schleberger, New J. Phys. 10, 053007 (2008)
[2] 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 175503 (2008)