SOLUTION OF THE KINETIC-EQUATION FOR THE DEPOSITED MOMENTUM DISTRIBUTION .2. TRESHOLD ENERGY EFFECT

The paper continues an investigation of the depth distribution of mome ntum deposited in solids by ion bombardment, finite-threshold-energy e ffects being discussed. It is shown that, for a wide set of system par ameters, existing semianalytical techniques lead to a qualitatively in correct description of momentum deposition, especially in the target s urface region. The most important qualitative features of the deposite d momentum distribution are considered, which cannot be ignored when f inding solutions of the kinetic equation by analytically based methods or interpreting numerical simulation data. Corresponding analytical a nd numerical results are presented.