Abstract
The channeled and polycrystalline Ar + sputtering yields of the hcp and fcc phases of cobalt have been measured as function of energy (20–100 keV) and temperature (20°C–500°C). Both the polycrystalline yields and the channeled fcc yields are in qualitative agreement with theoretical estimates, whereas the channeled hcp yields display a highly irregular behaviour as function of both temperature and energy. It is shown in this paper and earlier published works [1–3] that parameters such as ion species, ion fluence and cascade properties have a profound influence on the channeled hcp yields. Presumably, the combined effect of these parameters, together with the existence of the hcp → fcc phase transition, results in radiation induced damage, which particularly influences the channeling properties of heavy ions in the hcp phase.
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