Determination of the he pressure in bubbles formed during ?-implantation of Ni
- 1 January 1983
- journal article
- research article
- Published by Taylor & Francis in Radiation Effects
- Vol. 78 (1), 385-392
- https://doi.org/10.1080/00337578308207387
Abstract
At T−90°C, Ni single crystals were uniformly implanted to a depth of 10 μm with multi-energy He ions (E≤5.2 MeV), to concentrations from 0.06 to 1.1 at.%. From a small-angle X-ray scattering study, helium was found to be trapped in small bubbles with radii of 5.6 to 12 Å. The average distance between bubbles of about 80 Å was found to be independent of the implantation dose. At the higher concentration, CHc 1.1%, the bubbles were found to be strongly over-pressurized, i.e. the He pressure in the larger bubbles was determined to be as high as 300 kbar with a He atom/vacancy ratio of 2.Keywords
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