INVESTIGATION OF THE RECOIL IMPLANTATION FOR THIN-LAYER ACTIVATION AND WEAR MEASUREMENTS

In order to activate very thin layers (several micrometers or less) of the surfaces of different materials and to introduce activity into no nactivatable materials, this paper describes the introduction of recoi l activation by using heavy radioactive products from nuclear reaction s. The most commonly used isotopes for recoil implantation are Co-56 a nd Be-7. The nuclear reactions leading to the above isotopes have been studied previously. A special irradiation equipment was developed to avoid damage of the sample from the direct beam, The optimal geometry, energy and angular profiles of the implantation were also calculated and measured. The list of available reaction and their most important nuclear data are also listed. Special application fields are suggested . (C) 1998 Elsevier Science S.A. All rights reserved.