Abstract
Effects of atomic hydrogen on chemical sputtering yields of pyrolytic graphite due to bombardment with energetic hydrogen ions have been investigated. Three cases of bombardments were done: bombardment of the virgin target without the atomic hydrogen, bombardment of target with atomic hydrogen and bombardment of target exposed to the atomic hydrogen prior to bombardment. The results show that a difference in yields was not found between them and the effect of the atomic hydrogen was small. The reason is ascribed to the fact that the inactive graphite surface obtained by the atomic hydrogen can be destroyed by the energetic ion impacts.
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