Abstract

The validity of explaining the thermal effects using the chain model approach is investigated. For this purpose a copper (100) surface was bombarded along a 〈100〉 and a 〈110〉 direction, with low energetic noble gas ions. The comparison is troubled by charge exchange effects, which affect strongly the shape of the experimental energy distributions. At highej target temperatures the calculated temperature dependences agree with the experimental observations. At target temperatures below about 400 K discrepancies arise, which can be ascribed satisfactorily to the appearance of surface defects. The angular distributions depend strongly on the occurrence of charge exchange processes. They can be corrected for these effects using a model proposed earlier by the authors.

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