Abstract
The behavior of helium produced by the disintegration of actinides is a very important issue in the management of radioactive waste arising from nuclear reactors. The experimental techniques generally used to determine He profiles, based on standard nuclear reaction analysis, are either time consuming or lacking in accuracy. Elastic recoil detection analysis (ERDA) with high-energy heavy ions offers the possibility to extract helium profiles in a simpler way. This paper presents results obtained in the case of spinel single crystals implanted with He ions at several fluences (2 × 10 16 and 5 × 10 16 cm −2), providing different He concentrations (∼2 and 5 at.%, respectively). Helium depth profiles were measured by ERDA using high-energy Cu ions, whereas the damage induced by implantation was analyzed by classical Rutherford backscattering and channeling (RBS/C). Good He profiles were recorded, even at the smallest fluence used. Moreover, the combination of ERDA and RBS/C allows one to correlate He profiles and damage distributions.
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