Colloid Centres in AgCl Induced by Heavy Ion Implantation

The effects of ion implantation in AgCl produced mainly by the two types of interaction, electronic energy losses and nucleation energy losses, are essentially in the Ag+ lattice. Defects induced by the first one correspond to the photolysis mechanism and by the second perturbation are identified as Ag clusters. From the Lindhard diagram the conditions are given necessary to realize the two types of defects which are related to the mass and to the ion energy. The ions used are Li+, Na+, K+, Rb+, and Ar+ at RT and LNT. Due to the energy range available (50 to 500 keV) it is possible to produce significant variations of the nuclear energy loss ratio with Na+ ion and to observe seperately or simultaneously ionization defects and collision defects. It is found that the collision defects are colloidal silver connected to the nuclear energy losses. Nous montrons que dans l'implantation d'ions énergétiques dans une matrice d'AgCl, les effets principaux dus aux pertes d'énergie electronique et aux collisions nucléaires sont sur le sousréseau des argents. La première perturbation induit un mécanisme photolytique, les collisions nucléaires induisent des colloides d'argent. Nous définissons la condition nécessaire pour produire les deux types de défauts en comparant l'action de différents ions: Li+, Na+, K+, Rb+ et Ar+ dans des énergies comprises entre 50 et 50 keV.