Abstract

Abstract The total yield of secondary electrons emitted from a polycrystalline copper target during bombardment by protons, noble gas ions and copper ions has been studied in the energy range 10–400 keV. Comparison is made with a new theory for secondary electron emission in which the energy dependence of the yield is explained in terms of energyy transferred to the electrons in a surface layer of the target. Both the energy transferred from the ion to the target electrons and the energy transferred from the recoiling target atoms to the electrons are taken into account. Within the validity region of the theory the agreement between the theory and the experiment is good. The experimental equipment and procedure are described.

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