Abstract
We predict by first-principles calculations that Au is strongly bound to He in bcc Fe. Therefore, a segregated Au layer may form at the He bubble surface. The electron density in between Au–Au is found to be remarkably higher than in between Fe–Fe and Au–Fe atoms. As a result, the Au layer could serve as an effective barrier to approaching He atoms and hence slow down the bubble growth.
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More From: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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