Secondary Electron Emission from Thin Metal Foils Produced by 30-MeV Electrons

Secondary electron emission from thin metal foils is measured for incident 30-MeV electrons as a function of foil thickness from 0.02 to 3 g/cm2. The emission is divided into high-energy and low-energy components with the magnitude of the high-energy emission ranging from 3 to 12 percent and the low-energy emission from 3 to 6 percent. This experimental data can be described satisfactorily by two theoretical models.