Backscattering of 35 keV electrons from thick targets

Electron backscattering yields as a function of icident energy (T=5--35 keV) are reported for thick targets of Au, Ag, Cu, Al, and Be. The experimental values are in reasonable agreement with results of Monte Carlo computer simulations. Doubly differential distribution (intensity versus energy and angle) data for Au at T=35 keV, measured with a rotatable solid state detector, confirm that (i) the angular distribution follows a Lambert cosine distribution, and (ii) the most probable backscattered energy decreases (almost linearly) with increasing scattering angle