1986/01/01 by Deschkowskaja, Alla
Engineering · Materials Science · #Energetic Materials and Combustion #Polymer Nanocomposite Synthesis and Irradiation #Ion-surface interactions and analysis
paper · doi:10.34657/14353
The paper deals with the modification of glass structure by bombardment with high energy projectile ions. High energy atomic projectiles can be inserted into a surface layer of a glass by mass transfer interaction with atoms of the constituents of the glass. Elastic impact interaction (by nuclear collisions) displaces atoms, deforms bonding complexes and breaks bonds. Inelastic interaction (involving electron shells) chiefly produces ionization of the atoms in the glass. The interaction of these two effects determines the chemical activities of the atoms of the glass and the implanted projectile. The radiation damage caused by deceleration of the projectile ions is not itself sufficient to produce chemical reactions. Chemical reactions between implanted ions with displaced target atoms or ionic complexes through secondary collision cascades require that both reaction partners are sufficiently ionized, that is to say that a minimum ionization density must be attained in the target during deceleration. However, this can only be produced by very high projectile energies; the ratio of cross-sections for nuclear collisions and for eletron collisions of the particular projectile ions in the target glass need to be known to determine the most suitable experimental parameters for chemical interactions between the projectile ions and the glass.