Abstract
Deuterium trapping in vanadium pre-irradiated by helium ions was experimentally studied. One side of a vanadium sheet was continuously exposed to deuterium plasma and irradiated by 0.8MeV 3He ions with a dose of 1.2×1021m−2 to introduce radiation damages. Deuterium depth profiles in the irradiated region were observed by a nuclear reaction analysis. Many traps were produced by the irradiation and the deuterium concentration at 348K increased to 10 times compare to the concentration before the irradiation. The production rate of the trap to atomic displacement was estimated to be 0.021. The trap was fully annihilated at 523K. These behaviors suggested that the trap was atom vacancies associated with the radiation damages.
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