Secondary electron emission from solid surfaces by bombardment with charged particles

Based on the power potential law between incident ions and lattice electrons, the universal range curve of positive ions penetrating into solid targets due to electronic collisions is derived as a function of the reduced energy. By the assumption that the secondary electrons released in the material are proportional to the energy loss and follow the absorption law of Lenard type after their dislogement, the energy dependence of the secondary electron yield can consistently be obtained as a function of the reduced energy. The maximum yield of the secondary electrons at the characteristic energy is derived depending on the range due to electronic energy losses and the most probable escape distance, which are governed by the number of the power potential. It is found that these modifications for the kinetic-emission give considerably improved agreement between the theoretical and experimental universal reduced yield-energy curves. (auth.)