Dresden 2006 – scientific programme

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DS: Dünne Schichten

DS 16: Ion beam solid interaction I

DS 16.2: Talk

Thursday, March 30, 2006, 10:15–10:30, GER 37

Swift heavy ion irradiation of InP: Thermal spike analysis of ion track formation — •Andrey Kamarou, Werner Wesch, and Elke Wendler — Institut für Festkörperphysik, Universität Jena, Max-Wien-Platz 1, 07743 Jena

Irradiation of single-crystalline InP with swift heavy ions (SHI) in above-threshold electronic stopping regime causes formation of ion tracks for certain irradiation temperatures [1]. With increasing SHI fluence, more and more ion tracks are formed, until at high ion fluences a continuous amorphous layer is produced finally due to the multiple overlapping of the tracks.

Single-crystalline InP samples were irradiated either at liquid nitrogen temperature (LNT) or at room temperature (RT) with Kr, Xe, or Au ions with specific energies ranging within ca. 0.3 to 3.0 MeV/u. Afterwards the samples were investigated by means of the Rutherford backscattering spectrometry (RBS) and the transmission electron microscopy (TEM) in plan-view and cross-section geometries.

The obtained experimental data can be qualitatively and quantitatively explained using the thermal spike model. The results of the thermal spike calculations offer a self-consistent way to explain the influence of various irradiation conditions on the ion track formation and damage accumulation in InP and, therefore, can make a contribution to a better understanding of the underlying mechanisms.

[1] O. Herre, W. Wesch, E. Wendler, P.I. Gaiduk, F.F. Komarov, S. Klaumünzer, and P. Meier, Phys. Rev. B 58, 4832 (1998).